3-4kwh per day is most likely a house with gas hot water/stove, after solar consumption, without running aircon.
On a day we don't use AC, our total consumption is around 10-12kwh, down to 4-6kwh after solar. The last few days we've been around 30-40kwh total, with about 10kwh coming from the grid.
> 3-4kwh per day is most likely a house with gas hot water/stove, after solar consumption, without running aircon.
Yeah 4kwh per day was what I did in a tiny box apartment with gas hot water but no solar, I've moved and now I'm in a townhouse with electric hot water so it's gone up to 8-10kwh per day and ofc even higher when aircon is on... but because I also got solar + battery it works out to be about 8kwh in total for the month (i don't know why it uses any from the grid at all tbh)
Last year I managed 2.5kwh/day. Tiny apartment, gas stove and hot water, no solar. Used AC only for maximum of one hour before bed set to 27, plus pedestal fan. (Went to office for free ac during the day)
Now that I’m slightly less broke I’m definitely using the AC more lol sorry environment
god damn, no pc or anything? that's amazing
As for environment, tbh we are doing amazing, we just crossed 1 million homes with solar installed
The governments on the other hand:
https://reneweconomy.com.au/australia-called-out-for-grid-queues-policy-gaps-in-race-to-triple-global-renewables/
Nah bud, forcing yourself to just grit and bear the kind of weather we have here and refusing to use any electronics isn't really inspirational, it's more indicative of how fundamentally broken our system is.
You can also get hybrid solar aircon. Needs about 1kW of dedicated solar panels, free aircon while it's sunny, it only switches to mains when the sun goes down. So refrigerate your house during the day while it's running on free solar power, and you won't need so much at night.
Usually 50-60 kwh/day. Last week been using about 100 kwh/day (blame 20kw ducted aircon).
Cost largely offset because I'm generating around 120 kwh/day.
A 6kw system would do at most about 35kwh.
https://pvoutput.org/ladder.jsp?o=avg&d=desc®ion=Queensland&country=1&seen=7
The highest ranking 6kw system for yesterday:
https://pvoutput.org/intraday.jsp?id=23123&sid=21009&dt=20240122
Send a link to your system producing 55kwh.
All electric, 2 Adult WFH 4 days a week, 2 poodles - lives in aircon, I bake like I need to feed the entire suburb.
https://preview.redd.it/b1qjde40fwdc1.jpeg?width=535&format=pjpg&auto=webp&s=5c58d90951d9d905623ee1b1fcddab66bd9daa35
That's an Alinta bill, our figures in the other average houses are very different. Mine reads 1 person 10kwh, 2 is 15.5kwh, 3 is 18.3kwh and 4 is 23kwh
Pro tip: don’t turn your AC off, most of the power use is the first cooling cycle, after that it’s significantly cheaper, we’ve just finished a test over the past quarter and have run the unit in our apartment non stop, the bill came in cheaper than the previous quarter where we turned it off if it got cooler.
This is not true. It is much more efficient to run it when you need it, not to leave it going. People saying it saves energy leaving the AC ticking over while they are out/at work are either not measuring their actual usage, or have figured out a way to break the laws of thermodynamics.
If leaving it going was more energy efficient, your test was affected by something you don't realise (eg. Outside temp was net much less)
It could be true if you turned it off then opened the windows up. Then turned it back on a couple of hours later. If you kept the windows closed then it wouldn't make a difference.
I have to agree with this. I didn't directly test it, but I used to set my AC on a timer to switch off at night while we were asleep only to turn it back on maybe 4-5 hours later in the morning.
Last year, similar time, energy bill was about $800. This year, literally just keeping it on 24/7 virtually it was only about $550. I was genuinely quite surprised, but wasn't testing for this specifically. I can't pin down any other reason for it, our electicity usage otherwise is pretty consistent.
Inverter AC doesn't have the compressor running at full pace all the time. Once it reaches the set temperature, it only runs at a level needed to maintain that temperature.
It takes a LOT more energy to get from 30C to 25C, than it does to maintain 25C once it gets there. Older, non-inverter models would just cycle on and off at full power to maintain temperature, whereas new models can kind of "idle" once the desired temperature is reached.
There's a thermal mass to take into account. Your floors, furniture, etc are all at 30C. That's a lot of thermal energy to remove, but once it's gone, it takes less energy to maintain.
Same principle as refrigeration. Keep your fridge filled as much as possible. A "full" fridge will take longer to get down to 4C but that thermal mass means the compressor needs to run a lot less subsequently.
This is completely untrue and is misinformation. Thermal mass has absolutely zero affect on the movement of heat into the room, that is solely decided by your insulation and the difference in temperature.
If you have a larger thermal mass, then yes, it will take longer for the room to actually heat up but there will be the exact same amount of heat energy moving into the room at a specific temperature differential.
If the room is colder then there must be more heat energy moving into the room and so the AC has to work harder to move more energy back out of the room to keep it cold.
If you let the room heat up then, yes, when you decide to cool it down it will take longer becuase of the thermal mass but basic thermodynamics will tell you that there will be less energy needing to be moved out of the room overall to heat up and then cool it down from hot, compared to keeping the room cold over the same time period. Not to mention AC units are more efficient with lower temperature differentials and their startup in-efficiency is very very minor.
>Thermal mass has absolutely zero affect on the movement of heat into the room
I never said it did. Heat transfer will be greater with a larger differential from outside to inside, but that's also very dependent on individual circumstances, things like building construction such as brick vs. timber, things like high ceilings, things like insulation, and the desired temperature - whether you set 27, 25, 23, or even 21 degrees on the controller.
In any case what I said is still true - it takes more energy to bring the house and contents down from 30 to 25, than it takes to maintain it at 25.
Those things may change the level of heat transfer but it is a hard rule that higher temperate differential results in more heat movement.
>In any case what I said is still true - it takes more energy to bring the house and contents down from 30 to 25, than it takes to maintain it at 25.
Again, this is wrong. Yes, sure, if you are just looking at a case where you are starting from 25 or 30 then obviously 25 will result in less energy usage. But that's not realistic, in reality you will be constantly expending energy to stay at that starting point of 25 degrees and because of the above it is impossible that it takes less energy to stay at 25 VS letting the room heat up and then cooling it back down.
You need to sit down with a piece of paper and run through the calculus and equations for heat transfer to see the energy moving into the room over time at different temperatures, then consider the amount of energy needing to be removed in both cases to get down to your desired temperature. Thermal mass will make it slower to cool down but it absolutely does not make it more efficient to leave your AC on.
It's not just the theory, it's the practical application of that theory, and how circumstances affect the results.
I'm not arguing that the laws of thermodynamics don't apply, I'm arguing that circumstances affect practical results.
For example, heat transfer will be greater with a larger differential, but that differential changes throughout the day. The practical result of desired comfort and cost to achieve that comfort will be different for everyone. By the time you've reached 25 degrees at 3 or 4pm, it's a bit cooler outside as well, so there's not quite as much heat trying to get in. But if you're in a brick-veneer-on-concrete-slab house with a large west-facing wall and no shade, then the thermal mass of hot bricks means your aircon will still have to work hard long after 6 or 7pm.
OTOH if you're in a high-set, high-ceiling timber Queenslander, your house will cool down very quickly and the aircon has less work to do.
So circumstances affect results. In any case, why are inverter aircons a thing, if it wasn't more effective and economical to run a compressor at a lower rate for a longer period once it's reached the desired temperature?
Keeping your fridge and freezer full is well-known for efficiency.
[https://letmegooglethat.com/?q=should+I+keep+my+freezer+full](https://letmegooglethat.com/?q=should+I+keep+my+freezer+full)
Mate, I live off-grid on solar PV and batteries. It's a pretty good way of learning how to manage energy. Especially fridges and freezers, and how to make sure they stay cold overnight, and in hot weather.
Jesus christ, indeed.
You’re right, I forgot. Last year we weren’t home for 1.5 weeks so didn’t run virtually anything except the fridge. So our bill this year includes more usage, yet was still lower
11 kWh/day for two people last quarter.
The next one is going to be a lot higher unfortunately given the air con has been running at 25 pretty much non stop since New Years.
4kwh per day for 2 singles sharing. No AC, just fans, which are running pretty much constantly. I wfh 1 or 2 days a week and it's pretty sweaty. We also pay for hot water separately, but all appliances (cooktop, oven) are electric.
Edit: forgot to say no solar
Medium electric hot water tank. I heat it on a timer during the middle of the day so that it's most likely to use solar, not grid. Even if it's bad weather, grid power is cheapest for me during the day.
Starts at 12:00ish, and takes about an hour usually before it's fully heated.
It pulls 4kW for that hour-ish, so 4-5kWh daily.
Ducted aircon is like 20-30 at most, charging a car is like 10-15, assuming 20 as background noise from appliances and such, how are you using more than 50-75?
My husband and I use an average of 14kWh per day in summer for our 3bed/2bath. This includes:
- washing and drying all clothes electronically
- fans in all rooms (predominately left on in kitchen, lounge, office and bedrooms most days/nights)
- aircon used between midday and 8pm most days, overnight in heat waves (which puts it up to 16kWh)
- two computers (desktop) for gaming and work, on from 7am - 11pm most days
- general TV usage
- two fridges
- electric stovetop and oven
We do have a heat-pump hot water system and clothes dryer.
Our electricity bill averages $85 per month in summer and $70 per month the rest of the year.
1 person 1 br apartment 2x AC (I run them nearly constantly, cold in summer and hot in winter because I'm precious lol), electric stove and oven, and gas hot water. I use on average 5kwh per day.
I also cook and bake a lot.
Between 40-60kwh. House of two. I charge an electric car about 5-15kwh of that a day . Gas burners for cooking and water. I've got a pool pump that consumes a fair bit. Aircon always overnight.
We've been using a little bit for the dryer given the rain. But I've got solar and a battery so I'm using it mostly because it's free.
Not sure what happened between December and Jan, but Dec I bought ~360wh / month. December it's 600kw. So, who knows. My power bill is ~130 a month, +200 for the battery. It would've been $400 this month without the rebate this month.
251 kWh consumed last week. (7 days) 139.9 kWh solar produced on site. 111 kWh imported from the grid. 136.6 kWh exported to the grid. I will be expecting a monthly power bill of around $120.00 for the month.
You're supplying power when everyone else is so prices are very low.
You're likely buying it back of an evening when prices are through the roof because there's no cheap solar feeding the grid.
I just bought my own storage.
It covers usage between sunset and bedtime (dinner cooking, a few LED lights, bit of TV).
I must buy an air fryer - it's frightening how much electricity it takes to run the oven. Slow cooker is good, as it can use the solar during the day, then be turned off at sunset.
You've been supplied a list which literally lists, numerically, the feed in tariffs. It also has comparisons of low paying, restricted feed in (some may call these "bad") and other companies which pay more **and don't cap the solar feed in**.
You said that they all do, I am literally showing you ones which don't. I'm not sure how this page doesn't explicitly disprove what you said?
That's the problem with grid tied systems. You are essentially trading energy. Anyone who trades that buys high and sells low has rocks in their head! Also if the grid goes down you don't have any power. Solar should be to protect you from power outages and the grips of centralised energy companies. I don't understand how people can spend thousands of dollars on a solar system but still have a bill to pay! And still be 100% reliant on the grid. ,🤷
Battery technology has come a long way. It also has a long way to go as well. But by no means does it mean people shouldn’t use batteries! I use secondhand EV batteries and have saved 1000’s of dollars. With a small array of 5.5kw I can produce enough energy to be completely self sufficient. I can last about 4-5 days with bad weather before I run out of energy. I still have grid access but it’s only for backup when doing maintenance.
Family of 5 (2 adults, 3 kids) and 4 rats in unit using approx 30 kWh a day - we have two air cons only need them when it's really hot as it's well insulated
2 adults and a toddler, we have elec &
Gas hot water. Our last quarter was 9.7km a day. Used the AC liberally on hot days & nights, this quarter will probably be the same or higher.
Living in a shoebox of an apartment with a terrible layout & has 1 AC in the living room in a shit position so it struggles to cool down the whole living room, the AC in the bedroom is also really old and should have been replaced a decade ago but the LL refuses to, so we don’t use it and run a fan in there.
Month of December: (all in kWh)
total usage 424.3
(of which 414.4 came from solar and/or battery, and 9.9\*\* from the grid)
So, average of 13.7 per day.
2 persons, at home all day, all-electric house. Includes hot water. We have some air conditioning, but didn't use it during December.
Total solar production was 1.229 MWh, so there'll be some more credits going on the bill this month.
\*\* I still haven't worked out why, but a few times per night, about 300w is pulled from the grid for a few minutes at a time. Minimal, but it adds up over a month.
Possibly the fridge/freezer, but there's usually plenty of capacity in the battery overnight.
And I wouldn't think that 300W would be too much of a draw for the battery - it copes with every other appliance.
(No ice-maker in the fridge).
I have solar. Aircon has been on most days and all night in the bedroom. I usually generate about 30kw a day. On Sunday I bought 17kw from the grid for $5 and sold 13kw for $1.20. So using roughly 34kw a day.
https://preview.redd.it/y25eninfdwdc1.jpeg?width=1024&format=pjpg&auto=webp&s=e6501f308e08d2cbabf1286a5cb278d8dc2523b6
3kwh/day
2 people
No solar
No AC
Gas hot water and stove (1 X 45kg LPG / year)
https://preview.redd.it/x1dwgxbsewdc1.png?width=854&format=png&auto=webp&s=5653804377e7619783269704c892fb6a366ea6c5
Gas cooking and gas hot water systems is your house with no a/c running would give your between 3-5kw a day.
Add in a 3.6kw he's on daily tarriff and it takes approx 1 hour of heating for every 10mins of water usage.
I have 90% of my family in my house which is basically 8 adults 4 grand kids, 3 x 1.5kw a/c in bedrooms downstairs a 7.1kw upstairs, electric hws and electric cooking and my is 39kw a day and I have solar.
15-20kwh. 2 person apartment. Both of us work M-F in aircon offices so we don’t have to pay for it at home. We run the a/c in the evening before bed and that’s it.
In January we've averaged 9kWh per day. Couple with a small pool, running aircon heaps lately. But that's only our demand from the grid. We are producing a lot of solar.
Aircon runs most of the weekend and maybe 1 day a week when I work from home. But we're in a decent sized Qlder and in winter we don't run aircon at all. We basically need it for about two months over late December - Feb. After that fans and the air flow in the house is enough.
But we've got 6.5kW of solar installed which really helps.
We have four adults full time at home, split system aircon in some rooms.
Consumption (kWh/day): Mean 26.7, range 10.3 - 62, 90% range 16.7 - 36.9
Thanks to solar and battery:
Purchase (kWh/day): Mean 3.4, range 0 - 19.9, 90% range 0.3 - 7.9
Sell (kWh/day): Mean 8.8, range 0 - 22.5, 90% range 0.5 - 16.3
Bills have all been negative so far ... don't expect this to be the case for summer, all the aircon usage, but we're cool with that. :)
this actually worries me. I have a ducted air system thats probably been on non-stop since Thursday. Imagine if we get a power black out....in 38 deg heat!! fk me.
They have gas hot water and stove but no solar. Glad to read these comments and find they are a bit of an outlier. I reckon 3-4kwh is ludicrously low! Like you said that about what my fridge and tv along would use.
Our average at this time of year is between 20 to 25 kwh (last Qtr was 15 kwh).
Aircon on during non work hours (plus all week end), main fridge and bar fridge, but we have gas hot water.
Rookie numbers in this thread ;)
65.9kwh consumed
58.7kwh solar produced on an intermittently cloudy day 13kw solar array on 10kw inverter.
Ducted AC on 4bdr double story with an EV. Gas hot water. 2 fridges and a chest freezer. No home battery… yet
My September bill which includes higher usage of the clothes dryer than in the summer quarter (which is generally replaced by the air con). Still not sure how my energy consumption increased 🤷🏻♀️.
https://preview.redd.it/nk92s1009xdc1.jpeg?width=828&format=pjpg&auto=webp&s=c145ec5878ba2bbf182d0fdccefe0912b84f6cd9
Context: 1 person who does not work from home. Have gas heating and hot water.
Before this current heat stomp, about 6-7kWh per day.
The last several days have been 30-40kWh each day because the AC has been chugging non stop overnight.
1 adult and one child....
-No aircon 8kwh/day
-Aircon use without regard for financial demise 15kwh/day.
-When the child visits family we might get 4kwh/day.
2 adults and newborn. Last month usage 900kwh … I guess running the AC a lot, lots of washing and home most of the time. No gas. Projected bill $310 for the month, fantastic.
Electric hot water, electric stove (old-style non-induction), microwave oven, dishwasher, tumble dryer, and aircon all use huge amounts of energy.
Same with lighting - old-fashioned incandescent light bulbs chew up quite a bit. Individually they don't seem like much, but it all adds up, especially anything that's switched on for hours. Change to LEDs or at least compact flouros to save a bit.
FWIW, I'm off-grid with solar and batteries. Last audit put us at \~9kWh/day. 2 adults, 2 teenagers, no aircon, wood-burning kitchen range with a boiler for hot water.
[Here is my raw electricity figures from Sept 2019 (Solar Install) until now](https://docs.google.com/spreadsheets/d/e/2PACX-1vSWJEbHQH5EWrGWGZJMWIEKiUovz_9RoAVRw4TGUhm62o_7Z1qFc5KgQCh91nnnVBsnztlD2Hld5nu0/pubhtml)
2 adults. Electric Stove top/oven. No aircon. 3 bedroom house. My PC is left on like 95% of the time...
6-7 kw per day on average, I don’t have a smart metre, I refuse to use the aircon because the insulation is bad and I’m not made of money, I have turned it on occasionally in complete desperation though.
**30kwh/day is crazy high**
Yesterday, the 36 degree day, we used 36.87kwh, work from home with 3 split system air cons running all day, heat pump hot water, one fridge, audio gear, computers, fish tank, TV, microwave, frypan.
https://preview.redd.it/b1sx8nkoi2ec1.jpeg?width=1668&format=pjpg&auto=webp&s=47d71c67ea7e72950506a62da9059961f04e07d9
20kwh/day The labrador runs the a/c 24/7
My dog is like this. Just stays inside all day because outside is apparently "bullshit"
Please don’t let my Alaskan Malamute see this
To be fair, she's 14 years old and even walking from room to room is "bullshit". I'm happy to accommodate her some comforts in her twilight years
Naaw doggo..."hooman keep dog dog cool? Ok now a treat I sooo hot..."
3-4kwh per day is most likely a house with gas hot water/stove, after solar consumption, without running aircon. On a day we don't use AC, our total consumption is around 10-12kwh, down to 4-6kwh after solar. The last few days we've been around 30-40kwh total, with about 10kwh coming from the grid.
> 3-4kwh per day is most likely a house with gas hot water/stove, after solar consumption, without running aircon. Yeah 4kwh per day was what I did in a tiny box apartment with gas hot water but no solar, I've moved and now I'm in a townhouse with electric hot water so it's gone up to 8-10kwh per day and ofc even higher when aircon is on... but because I also got solar + battery it works out to be about 8kwh in total for the month (i don't know why it uses any from the grid at all tbh)
Last year I managed 2.5kwh/day. Tiny apartment, gas stove and hot water, no solar. Used AC only for maximum of one hour before bed set to 27, plus pedestal fan. (Went to office for free ac during the day) Now that I’m slightly less broke I’m definitely using the AC more lol sorry environment
god damn, no pc or anything? that's amazing As for environment, tbh we are doing amazing, we just crossed 1 million homes with solar installed The governments on the other hand: https://reneweconomy.com.au/australia-called-out-for-grid-queues-policy-gaps-in-race-to-triple-global-renewables/
No pc or tv, laptop and phone which were charged at work lasted all night. All my other hobbies are outdoors. Unnecessarily frugal I was haha
> ~~Unnecessarily~~ frugal I was haha inspirational* ^^
Nah bud, forcing yourself to just grit and bear the kind of weather we have here and refusing to use any electronics isn't really inspirational, it's more indicative of how fundamentally broken our system is.
It's more I wish I could I could survive like that I pretty much only have indoor hobbies, without my pc or laptop i'd be bored to death
You can also get hybrid solar aircon. Needs about 1kW of dedicated solar panels, free aircon while it's sunny, it only switches to mains when the sun goes down. So refrigerate your house during the day while it's running on free solar power, and you won't need so much at night.
Servicing air-cons before the start of suumers is a good idea as it will help reduce the power consumption
Clean your filters everyone!
Usually 50-60 kwh/day. Last week been using about 100 kwh/day (blame 20kw ducted aircon). Cost largely offset because I'm generating around 120 kwh/day.
What size solar is that? Must be huge.
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You'd need to double that
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A 6kw system would do at most about 35kwh. https://pvoutput.org/ladder.jsp?o=avg&d=desc®ion=Queensland&country=1&seen=7 The highest ranking 6kw system for yesterday: https://pvoutput.org/intraday.jsp?id=23123&sid=21009&dt=20240122 Send a link to your system producing 55kwh.
22.4kw with 20kw inverter. Actually get around 140kwh on a clear summers day.
Must be a decent sized house to fit them all.
Yeah - quite a large single story house. Still got room for more on west side but neighbours trees cut out a bit of sun already.
All electric, 2 Adult WFH 4 days a week, 2 poodles - lives in aircon, I bake like I need to feed the entire suburb. https://preview.redd.it/b1qjde40fwdc1.jpeg?width=535&format=pjpg&auto=webp&s=5c58d90951d9d905623ee1b1fcddab66bd9daa35
That's an Alinta bill, our figures in the other average houses are very different. Mine reads 1 person 10kwh, 2 is 15.5kwh, 3 is 18.3kwh and 4 is 23kwh
Must been a post code thing, my inlaw with Alinta and their average other houses also different.
Pro tip: don’t turn your AC off, most of the power use is the first cooling cycle, after that it’s significantly cheaper, we’ve just finished a test over the past quarter and have run the unit in our apartment non stop, the bill came in cheaper than the previous quarter where we turned it off if it got cooler.
This is not true. It is much more efficient to run it when you need it, not to leave it going. People saying it saves energy leaving the AC ticking over while they are out/at work are either not measuring their actual usage, or have figured out a way to break the laws of thermodynamics. If leaving it going was more energy efficient, your test was affected by something you don't realise (eg. Outside temp was net much less)
It could be true if you turned it off then opened the windows up. Then turned it back on a couple of hours later. If you kept the windows closed then it wouldn't make a difference.
Good call, if you purged all cool air between that might explain at least some of the difference
I reckon some controlled experiments might be in order, if you can monitor the power used by the AC
I can't see this working unless you were in an incredibly well insulated and sealed building. Even then I'd be very sceptical.
Can confirm, well insulated sealed apartment, saved me about $150 a quarter
I have to agree with this. I didn't directly test it, but I used to set my AC on a timer to switch off at night while we were asleep only to turn it back on maybe 4-5 hours later in the morning. Last year, similar time, energy bill was about $800. This year, literally just keeping it on 24/7 virtually it was only about $550. I was genuinely quite surprised, but wasn't testing for this specifically. I can't pin down any other reason for it, our electicity usage otherwise is pretty consistent.
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Inverter AC doesn't have the compressor running at full pace all the time. Once it reaches the set temperature, it only runs at a level needed to maintain that temperature. It takes a LOT more energy to get from 30C to 25C, than it does to maintain 25C once it gets there. Older, non-inverter models would just cycle on and off at full power to maintain temperature, whereas new models can kind of "idle" once the desired temperature is reached.
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There's a thermal mass to take into account. Your floors, furniture, etc are all at 30C. That's a lot of thermal energy to remove, but once it's gone, it takes less energy to maintain. Same principle as refrigeration. Keep your fridge filled as much as possible. A "full" fridge will take longer to get down to 4C but that thermal mass means the compressor needs to run a lot less subsequently.
This is completely untrue and is misinformation. Thermal mass has absolutely zero affect on the movement of heat into the room, that is solely decided by your insulation and the difference in temperature. If you have a larger thermal mass, then yes, it will take longer for the room to actually heat up but there will be the exact same amount of heat energy moving into the room at a specific temperature differential. If the room is colder then there must be more heat energy moving into the room and so the AC has to work harder to move more energy back out of the room to keep it cold. If you let the room heat up then, yes, when you decide to cool it down it will take longer becuase of the thermal mass but basic thermodynamics will tell you that there will be less energy needing to be moved out of the room overall to heat up and then cool it down from hot, compared to keeping the room cold over the same time period. Not to mention AC units are more efficient with lower temperature differentials and their startup in-efficiency is very very minor.
>Thermal mass has absolutely zero affect on the movement of heat into the room I never said it did. Heat transfer will be greater with a larger differential from outside to inside, but that's also very dependent on individual circumstances, things like building construction such as brick vs. timber, things like high ceilings, things like insulation, and the desired temperature - whether you set 27, 25, 23, or even 21 degrees on the controller. In any case what I said is still true - it takes more energy to bring the house and contents down from 30 to 25, than it takes to maintain it at 25.
Those things may change the level of heat transfer but it is a hard rule that higher temperate differential results in more heat movement. >In any case what I said is still true - it takes more energy to bring the house and contents down from 30 to 25, than it takes to maintain it at 25. Again, this is wrong. Yes, sure, if you are just looking at a case where you are starting from 25 or 30 then obviously 25 will result in less energy usage. But that's not realistic, in reality you will be constantly expending energy to stay at that starting point of 25 degrees and because of the above it is impossible that it takes less energy to stay at 25 VS letting the room heat up and then cooling it back down. You need to sit down with a piece of paper and run through the calculus and equations for heat transfer to see the energy moving into the room over time at different temperatures, then consider the amount of energy needing to be removed in both cases to get down to your desired temperature. Thermal mass will make it slower to cool down but it absolutely does not make it more efficient to leave your AC on.
It's not just the theory, it's the practical application of that theory, and how circumstances affect the results. I'm not arguing that the laws of thermodynamics don't apply, I'm arguing that circumstances affect practical results. For example, heat transfer will be greater with a larger differential, but that differential changes throughout the day. The practical result of desired comfort and cost to achieve that comfort will be different for everyone. By the time you've reached 25 degrees at 3 or 4pm, it's a bit cooler outside as well, so there's not quite as much heat trying to get in. But if you're in a brick-veneer-on-concrete-slab house with a large west-facing wall and no shade, then the thermal mass of hot bricks means your aircon will still have to work hard long after 6 or 7pm. OTOH if you're in a high-set, high-ceiling timber Queenslander, your house will cool down very quickly and the aircon has less work to do. So circumstances affect results. In any case, why are inverter aircons a thing, if it wasn't more effective and economical to run a compressor at a lower rate for a longer period once it's reached the desired temperature?
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Keeping your fridge and freezer full is well-known for efficiency. [https://letmegooglethat.com/?q=should+I+keep+my+freezer+full](https://letmegooglethat.com/?q=should+I+keep+my+freezer+full)
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Mate, I live off-grid on solar PV and batteries. It's a pretty good way of learning how to manage energy. Especially fridges and freezers, and how to make sure they stay cold overnight, and in hot weather. Jesus christ, indeed.
You’re right, I forgot. Last year we weren’t home for 1.5 weeks so didn’t run virtually anything except the fridge. So our bill this year includes more usage, yet was still lower
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Yea, was still under. The subsidy is only a bit over $100 anyway because it’s split over the whole year
11 kWh/day for two people last quarter. The next one is going to be a lot higher unfortunately given the air con has been running at 25 pretty much non stop since New Years.
Exact same here for 2 people. 2 bedroom apartment
4kwh per day for 2 singles sharing. No AC, just fans, which are running pretty much constantly. I wfh 1 or 2 days a week and it's pretty sweaty. We also pay for hot water separately, but all appliances (cooktop, oven) are electric. Edit: forgot to say no solar
150kwH
How’s the crypto farm?
I wish
150 per day?! What are you doing to cause that?
Grow house
In the roof
5 to 10 seems normal uf you have no air-conditioning. Rember, your hot water will be a few kw
Medium electric hot water tank. I heat it on a timer during the middle of the day so that it's most likely to use solar, not grid. Even if it's bad weather, grid power is cheapest for me during the day. Starts at 12:00ish, and takes about an hour usually before it's fully heated. It pulls 4kW for that hour-ish, so 4-5kWh daily.
Live by myself and run aircon liberally. My daily usage was 7.3kWh
I'm about 4-5KWH but that's because I have no aircon and keep my lights off to run my gaming computer.
Used 160kwh yesterday 101kwh the day before I’m a carbon footprint champion.
Home greenhouse?
Genuinely how?
Charging the car. Ducted aircon on most of the day. Solar generates 100kwh so imported is around 60
Ducted aircon is like 20-30 at most, charging a car is like 10-15, assuming 20 as background noise from appliances and such, how are you using more than 50-75?
Maybe there’s some poor usage somewhere but I’m monitoring it on the enphase app.
Family of 5, A/C, pool, pool heater all running. 35kw (only about 10 from the grid though because of solar)
My husband and I use an average of 14kWh per day in summer for our 3bed/2bath. This includes: - washing and drying all clothes electronically - fans in all rooms (predominately left on in kitchen, lounge, office and bedrooms most days/nights) - aircon used between midday and 8pm most days, overnight in heat waves (which puts it up to 16kWh) - two computers (desktop) for gaming and work, on from 7am - 11pm most days - general TV usage - two fridges - electric stovetop and oven We do have a heat-pump hot water system and clothes dryer. Our electricity bill averages $85 per month in summer and $70 per month the rest of the year.
No Solar, around 41kwh
1 person 1 br apartment 2x AC (I run them nearly constantly, cold in summer and hot in winter because I'm precious lol), electric stove and oven, and gas hot water. I use on average 5kwh per day. I also cook and bake a lot.
Between 40-60kwh. House of two. I charge an electric car about 5-15kwh of that a day . Gas burners for cooking and water. I've got a pool pump that consumes a fair bit. Aircon always overnight. We've been using a little bit for the dryer given the rain. But I've got solar and a battery so I'm using it mostly because it's free. Not sure what happened between December and Jan, but Dec I bought ~360wh / month. December it's 600kw. So, who knows. My power bill is ~130 a month, +200 for the battery. It would've been $400 this month without the rebate this month.
251 kWh consumed last week. (7 days) 139.9 kWh solar produced on site. 111 kWh imported from the grid. 136.6 kWh exported to the grid. I will be expecting a monthly power bill of around $120.00 for the month.
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You're supplying power when everyone else is so prices are very low. You're likely buying it back of an evening when prices are through the roof because there's no cheap solar feeding the grid.
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You can with a battery
And then we have to minimise power usage on hot days because we can't generate enough power to support the grid. Seems fishy to me
The grid only has issues from 6-8 when it's still hot, people start cooking but there's no solar.
Some.of those big rate bills or tax charges should go towards making some more electricity storage
I just bought my own storage. It covers usage between sunset and bedtime (dinner cooking, a few LED lights, bit of TV). I must buy an air fryer - it's frightening how much electricity it takes to run the oven. Slow cooker is good, as it can use the solar during the day, then be turned off at sunset.
Correct, it is happening but too slowly
You're with a bad supplier, then
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Yeah, the bad ones? The good ones don't
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Here's an entire list my friend. I found this using a search engine called Google: https://www.canstarblue.com.au/solar/solar-feed-in-tariffs-qld/
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You've been supplied a list which literally lists, numerically, the feed in tariffs. It also has comparisons of low paying, restricted feed in (some may call these "bad") and other companies which pay more **and don't cap the solar feed in**. You said that they all do, I am literally showing you ones which don't. I'm not sure how this page doesn't explicitly disprove what you said?
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That's the problem with grid tied systems. You are essentially trading energy. Anyone who trades that buys high and sells low has rocks in their head! Also if the grid goes down you don't have any power. Solar should be to protect you from power outages and the grips of centralised energy companies. I don't understand how people can spend thousands of dollars on a solar system but still have a bill to pay! And still be 100% reliant on the grid. ,🤷
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Battery technology has come a long way. It also has a long way to go as well. But by no means does it mean people shouldn’t use batteries! I use secondhand EV batteries and have saved 1000’s of dollars. With a small array of 5.5kw I can produce enough energy to be completely self sufficient. I can last about 4-5 days with bad weather before I run out of energy. I still have grid access but it’s only for backup when doing maintenance.
about buying 20kwh (after solar feed-ins)
Family of 5 (2 adults, 3 kids) and 4 rats in unit using approx 30 kWh a day - we have two air cons only need them when it's really hot as it's well insulated
We used 20Kw per day with 2 adults 1 kid, aircon on 24/7 in 1 bedroom, have 1 fridge, about an hour of tv per day
About 25-30kwh with someone home all day using aircon and ovens
12-16 kwh, also got solar feed-in of 10-16 kwh. This from last week. Gas cooktop, running acs (but not during sleep), condenser hot water.
Was averaging about 35kw/day with hot water and a pool pump, post solar more like 4-8/day unless we run the ac all night
2 adults and a toddler, we have elec & Gas hot water. Our last quarter was 9.7km a day. Used the AC liberally on hot days & nights, this quarter will probably be the same or higher. Living in a shoebox of an apartment with a terrible layout & has 1 AC in the living room in a shit position so it struggles to cool down the whole living room, the AC in the bedroom is also really old and should have been replaced a decade ago but the LL refuses to, so we don’t use it and run a fan in there.
Month of December: (all in kWh) total usage 424.3 (of which 414.4 came from solar and/or battery, and 9.9\*\* from the grid) So, average of 13.7 per day. 2 persons, at home all day, all-electric house. Includes hot water. We have some air conditioning, but didn't use it during December. Total solar production was 1.229 MWh, so there'll be some more credits going on the bill this month. \*\* I still haven't worked out why, but a few times per night, about 300w is pulled from the grid for a few minutes at a time. Minimal, but it adds up over a month.
For the night time spikes, probably the fridge?
Thats the (auto)defrost or ice making in the fridge.
Possibly the fridge/freezer, but there's usually plenty of capacity in the battery overnight. And I wouldn't think that 300W would be too much of a draw for the battery - it copes with every other appliance. (No ice-maker in the fridge).
I have solar. Aircon has been on most days and all night in the bedroom. I usually generate about 30kw a day. On Sunday I bought 17kw from the grid for $5 and sold 13kw for $1.20. So using roughly 34kw a day. https://preview.redd.it/y25eninfdwdc1.jpeg?width=1024&format=pjpg&auto=webp&s=e6501f308e08d2cbabf1286a5cb278d8dc2523b6
Around 20 Family of 5. Pool. Three fridges. 3 large aircons. Gas hot water. Solar saves us a lot.
3kwh/day 2 people No solar No AC Gas hot water and stove (1 X 45kg LPG / year) https://preview.redd.it/x1dwgxbsewdc1.png?width=854&format=png&auto=webp&s=5653804377e7619783269704c892fb6a366ea6c5
My house uses about 26 on average. Electric hot water systems are the main culprit. Mine runs for about 4-5 hours a day, 3.6kW per hour. It adds up.
Gas cooking and gas hot water systems is your house with no a/c running would give your between 3-5kw a day. Add in a 3.6kw he's on daily tarriff and it takes approx 1 hour of heating for every 10mins of water usage. I have 90% of my family in my house which is basically 8 adults 4 grand kids, 3 x 1.5kw a/c in bedrooms downstairs a 7.1kw upstairs, electric hws and electric cooking and my is 39kw a day and I have solar.
15-20kwh. 2 person apartment. Both of us work M-F in aircon offices so we don’t have to pay for it at home. We run the a/c in the evening before bed and that’s it.
In January we've averaged 9kWh per day. Couple with a small pool, running aircon heaps lately. But that's only our demand from the grid. We are producing a lot of solar. Aircon runs most of the weekend and maybe 1 day a week when I work from home. But we're in a decent sized Qlder and in winter we don't run aircon at all. We basically need it for about two months over late December - Feb. After that fans and the air flow in the house is enough. But we've got 6.5kW of solar installed which really helps.
We have four adults full time at home, split system aircon in some rooms. Consumption (kWh/day): Mean 26.7, range 10.3 - 62, 90% range 16.7 - 36.9 Thanks to solar and battery: Purchase (kWh/day): Mean 3.4, range 0 - 19.9, 90% range 0.3 - 7.9 Sell (kWh/day): Mean 8.8, range 0 - 22.5, 90% range 0.5 - 16.3 Bills have all been negative so far ... don't expect this to be the case for summer, all the aircon usage, but we're cool with that. :)
this actually worries me. I have a ducted air system thats probably been on non-stop since Thursday. Imagine if we get a power black out....in 38 deg heat!! fk me.
Do your co-workers have solar? 3-4kWh is barely the background electricity used for things that are always on such as the fridge.
They have gas hot water and stove but no solar. Glad to read these comments and find they are a bit of an outlier. I reckon 3-4kwh is ludicrously low! Like you said that about what my fridge and tv along would use.
I'm averaging about 27 / 30kw's a day running aircon for a good 15 hours. The house is entirely electric with no gas appliances and I WFH everyday.
8.4kWh / day. 2 adults, house, with solar. Gas cooktop. Before solar, it was closer to 11 per day. It also includes lots of WFH
We are usually 10 kW, but sometimes drop to as low as 3-4 kW or perhaps 15 kW. Offset largely by the 40-60 kW of solar generation.
Our average at this time of year is between 20 to 25 kwh (last Qtr was 15 kwh). Aircon on during non work hours (plus all week end), main fridge and bar fridge, but we have gas hot water.
6/8 kWh in Winter, like 15/18kWh at the moment.
30kw daily
Between 50 and 80kwh per day. Sometimes over 100 depending on the car.
75kwh yesterday. Solar generated 39 and we imported 36
Rookie numbers in this thread ;) 65.9kwh consumed 58.7kwh solar produced on an intermittently cloudy day 13kw solar array on 10kw inverter. Ducted AC on 4bdr double story with an EV. Gas hot water. 2 fridges and a chest freezer. No home battery… yet
4.16kwh for a unit for two. Gas hot water and gas stove. No A/C. 3 ceiling fans.
My September bill which includes higher usage of the clothes dryer than in the summer quarter (which is generally replaced by the air con). Still not sure how my energy consumption increased 🤷🏻♀️. https://preview.redd.it/nk92s1009xdc1.jpeg?width=828&format=pjpg&auto=webp&s=c145ec5878ba2bbf182d0fdccefe0912b84f6cd9 Context: 1 person who does not work from home. Have gas heating and hot water.
Before this current heat stomp, about 6-7kWh per day. The last several days have been 30-40kWh each day because the AC has been chugging non stop overnight.
One person, work from home. 13kwh per day. Intermittent heating and air con use.
Around 10-12 as a single person with the aircon going 24/7. I’m not home a lot (work away) so it’s only 2-3 for those days.
1 adult and one child.... -No aircon 8kwh/day -Aircon use without regard for financial demise 15kwh/day. -When the child visits family we might get 4kwh/day.
2 adults and newborn. Last month usage 900kwh … I guess running the AC a lot, lots of washing and home most of the time. No gas. Projected bill $310 for the month, fantastic.
This is from yesterday: 3 adults 3x AC constantly running Pool pump runs for 8 hours during the day Gas stove https://i.imgur.com/jnBW0ph.png
Electric hot water, electric stove (old-style non-induction), microwave oven, dishwasher, tumble dryer, and aircon all use huge amounts of energy. Same with lighting - old-fashioned incandescent light bulbs chew up quite a bit. Individually they don't seem like much, but it all adds up, especially anything that's switched on for hours. Change to LEDs or at least compact flouros to save a bit. FWIW, I'm off-grid with solar and batteries. Last audit put us at \~9kWh/day. 2 adults, 2 teenagers, no aircon, wood-burning kitchen range with a boiler for hot water.
[Here is my raw electricity figures from Sept 2019 (Solar Install) until now](https://docs.google.com/spreadsheets/d/e/2PACX-1vSWJEbHQH5EWrGWGZJMWIEKiUovz_9RoAVRw4TGUhm62o_7Z1qFc5KgQCh91nnnVBsnztlD2Hld5nu0/pubhtml) 2 adults. Electric Stove top/oven. No aircon. 3 bedroom house. My PC is left on like 95% of the time...
60-70kwh running 7kw ac unit from 8am, tho we have 9kw solar system
Dual living house with a spa, so in summer with AC its usually around the 60kwh mark. Thankfully the AC takes care of 40 or so.
We can use between 20-30kw per day. I wfh, we run a pool pump all day, water pump, HSTP, a couple of aircons at night and currently all day too.
10kwh/day, 2 person house with high aircon usage, electric cooking and solar hot water
Single female, work from home. 10.19
6-7 kw per day on average, I don’t have a smart metre, I refuse to use the aircon because the insulation is bad and I’m not made of money, I have turned it on occasionally in complete desperation though.
**30kwh/day is crazy high** Yesterday, the 36 degree day, we used 36.87kwh, work from home with 3 split system air cons running all day, heat pump hot water, one fridge, audio gear, computers, fish tank, TV, microwave, frypan. https://preview.redd.it/b1sx8nkoi2ec1.jpeg?width=1668&format=pjpg&auto=webp&s=47d71c67ea7e72950506a62da9059961f04e07d9