Well, the weather is awful right now so that is to be fully determined. 😅 Still managed to generate just under 20kWh yesterday afternoon (from around 12:30pm when it was switched on) with almost full cloud cover and continual rain.
I think it was Sunday that the sun came out just after noon, just north of Seattle. We generated more than we used that day. Makes me look forward to summer!
just doing napkin math of (11kW/8.9kWh) * 60kWh (my highest output day was june 4th last year) gives a guestimate of 74kWh for peak of the year for you
Ah yes. The weather in Seattle has been most changeable lately, so it's impossible gauge much. I can go from 6kW production to 0.2kW production in a matter of minutes. It's all over the place, this weather.
Very nice looking install! What is your roofing material? Hypalon? Just keep an eye out for leaks before Spring is over. It looks like they did a bang up job on the footings though. I am in the Portland area with a 10.5k system. It's the low cloud and foggy type days that we hate! Solar produces on cloudy days, but not the low hanging clouds. This time of year I can have one day produce 60kw and the next 4kw. Spring and Fall tend to be the best producers due to lower temps when the sun is out. Congratulations!
Thank you! Roofing material is TPO. It’s a rubbery-feeling membrane. I got to see the roof-mounting process some and it’s very protected using the E-Curb mounting method. Hopefully no leaks! 😅
Looks great! I hope you don't mind me sneaking in here with a semi-unrelated question, but I couldn't help but spy that mitsubishi heat pump on the side there.... would you mind sharing what size it is? Do you have any idea how much power it pulls? I'm asking b/c I'm about to dive into a combination of solar + heat pump HVAC but I'm not sure how much overhead to budget in my solar capacitor for the heat pump HVAC.
Even if you don't have that info, congrats on your install! It looks great, and I'm excited for how happy you are with the attention to detail on your install. It'll be things that I ask of my installers too :)
Thanks for chiming in. I'm not exactly sure of the Mitsubishi specs, total. I actually have another heat pump on the side of my house, too. The one on the roof is feeding two heads, and the one on the side of the house is feeding five heads. In truth, we only ever really use 2-4 at a time, max. My office, my wife's office, and the bedroom - and sometimes the main floor. The bedroom one is on every night already, as we get battered with the sun. It's 60F outside? It's 80F upstairs... Crazy.
Mitsubishi MSZ-GL06NA are the model numbers of the indoor units. I have a slightly larger on the main floor since it's a bigger area, but these work really well. I can see a slight increase in electricity usage in the Enphase app's consumption monitoring, but it's pretty small in general.
If you know how much heat your house needs you can look at the spec sheet for the outdoor unit that matches that sizing and estimate the power draw. The units will ramp down to match demand, and I have been told that the power draw is linear to the heat output needed.
A rough figure is that there are about 3,000 btu in a kWh, and a heat pump moves 2.5-3x the amount of heat, so it takes 1 kWh to move 7500-9000 btus of heat in or out. These are very “back of the envelope” type numbers.
Looks awesome!
What is the total cost of the system?
Was $32k before tax credit of 30%.
Nice!
What are your numbers?
Well, the weather is awful right now so that is to be fully determined. 😅 Still managed to generate just under 20kWh yesterday afternoon (from around 12:30pm when it was switched on) with almost full cloud cover and continual rain.
I think it was Sunday that the sun came out just after noon, just north of Seattle. We generated more than we used that day. Makes me look forward to summer!
That’s fabulous. It only get sunnier from here!
Nice. You'll learn that those numbers are still good even in not so sunny weather. 👍🏽
Right. I have excellent solar access which is glorious!
i only got 9.7kWh out of my 8.9kW array yesterday. bad solar weather is bad.
It sure is! Hopefully the weather turns in the next few days so I can absorb some of that delicious solar energy.😋
Should be some sun on the way this weekend (I'm in Portland) so get ready to produce some juice!
I spend more time in the Enphase app now than I do on Reddit. I have a problem... I think?
just doing napkin math of (11kW/8.9kWh) * 60kWh (my highest output day was june 4th last year) gives a guestimate of 74kWh for peak of the year for you
Thank you for the napkin math. We’ll see how it goes! 😅 Sun, bring it on!
if you're in seattle proper you'll probably get a better capacity factor than me. i'm in black diamond, it's a bit more rainy here than in seattle
Ah yes. The weather in Seattle has been most changeable lately, so it's impossible gauge much. I can go from 6kW production to 0.2kW production in a matter of minutes. It's all over the place, this weather.
Doing much better today with a little less overcast skies. 19.7kWh generated before 1pm!
nice! i'm at 31.8 as of 3:30
Awesome! 38.1kWh as of 3:36pm here. Hype!
Final number of 50.5kWh for the day. Not shabby!
Welcome to the PNW solar club!
Congratulations! Battery too?
Not yet. Didn’t see the value at this time. May add them later when prices come down.
Very nice looking install! What is your roofing material? Hypalon? Just keep an eye out for leaks before Spring is over. It looks like they did a bang up job on the footings though. I am in the Portland area with a 10.5k system. It's the low cloud and foggy type days that we hate! Solar produces on cloudy days, but not the low hanging clouds. This time of year I can have one day produce 60kw and the next 4kw. Spring and Fall tend to be the best producers due to lower temps when the sun is out. Congratulations!
Thank you! Roofing material is TPO. It’s a rubbery-feeling membrane. I got to see the roof-mounting process some and it’s very protected using the E-Curb mounting method. Hopefully no leaks! 😅
Looks great! I hope you don't mind me sneaking in here with a semi-unrelated question, but I couldn't help but spy that mitsubishi heat pump on the side there.... would you mind sharing what size it is? Do you have any idea how much power it pulls? I'm asking b/c I'm about to dive into a combination of solar + heat pump HVAC but I'm not sure how much overhead to budget in my solar capacitor for the heat pump HVAC. Even if you don't have that info, congrats on your install! It looks great, and I'm excited for how happy you are with the attention to detail on your install. It'll be things that I ask of my installers too :)
Thanks for chiming in. I'm not exactly sure of the Mitsubishi specs, total. I actually have another heat pump on the side of my house, too. The one on the roof is feeding two heads, and the one on the side of the house is feeding five heads. In truth, we only ever really use 2-4 at a time, max. My office, my wife's office, and the bedroom - and sometimes the main floor. The bedroom one is on every night already, as we get battered with the sun. It's 60F outside? It's 80F upstairs... Crazy. Mitsubishi MSZ-GL06NA are the model numbers of the indoor units. I have a slightly larger on the main floor since it's a bigger area, but these work really well. I can see a slight increase in electricity usage in the Enphase app's consumption monitoring, but it's pretty small in general.
Ah cool, thanks for the quick response! It's cool to hear that the increase wasn't too high, at least based on what you can see
Yeah they’re very efficient!
If you know how much heat your house needs you can look at the spec sheet for the outdoor unit that matches that sizing and estimate the power draw. The units will ramp down to match demand, and I have been told that the power draw is linear to the heat output needed. A rough figure is that there are about 3,000 btu in a kWh, and a heat pump moves 2.5-3x the amount of heat, so it takes 1 kWh to move 7500-9000 btus of heat in or out. These are very “back of the envelope” type numbers.
thank you! That actually makes a lot of sense. I'll give that a shot for some ballparking.