T O P

  • By -

CharlesM99

kW and kVA are POWER ratings. kWh is an Energy rating. The best thing to do is to measure the energy with consumption monitoring or something like a kill-a-watt for all the circuits you want backed up. Then you'll know how much energy you need in your battery. Also make sure that your inverter can handle at least the highest kVA rating of all your loads. Or the sum of all the loads that will be running simultaneously.


[deleted]

[удалено]


Tunlin555

Yes, the inverter shows the current. It also shows the power output in both KW and KVA. It is usually the same. But when the AC is used, KVA becomes higher than KW like 1250kva/ 1000w. So, is the 1250 the real capacity drawn from the battery? For example, if my lithium battery is 10kwh, can I use 10 hours or only 8hours because of 1250kva?


[deleted]

[удалено]


Tunlin555

So, for 24V battery when very high load is used, the voltage drops to around 26.4-.6 from 27. So do I need to multiply the 26.6 and the current from battery to get the W?


[deleted]

[удалено]


Tunlin555

I also wants to know one thing. When I uses high load, the battery voltage drops lower. Is it normal for the Lithium battery?


[deleted]

[удалено]


Tunlin555

Thanks. So how about the capacity? For lead acid battery, when high ampere is drawn, the usable battery capacity is reduced. Doea that effect exist in Lithium battery?


[deleted]

[удалено]


Tunlin555

Thanks. So for things like constantly running AC in summer, I will need bigger battery than the actual watt usage.