cho
New Member
- Joined
- Oct 21, 2021
- Messages
- 25
I have a hybrid inverter with two acid batteries (260a) hocked up with 6 x 285w panels. In house I have separated electrical wires; one parallel for grid electric and one parallel for solar electric. Both on 220v. When there is sun I can run everything on solar power without using grid energy. But in place where I live during autumn and winter there can be very long periods without sun (few weeks). In that no sun period my idea was to charge batteries during the night when electric power is 50% cheaper and then using it during the day. What I figure out by measuring output and input power to batteries is that for charging batteries during night inverter is spending 2 x more kWh then that I use during day. I measured ten days input / output and I got about 10 kWh spending during day and 20 kWh for charging battery during night. Does anyone have some advice how can I lower that big difference between spent during day and charging batteries during night? Or how to effectively use solar system in period when there is no sunny days?