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They are all based on battery voltage, for start/stop charging, and for switch between grid and battery. This is a problem because battery voltage fluctuate too much under normal load/charge due to internal resistance. I reported in other thread, that my battery system seems to have around 50...

Hi everyone, I’m wondering what is the reasonable range of Lifepo4 battery internal resistance. I ask because my 48v 100ah battery system has been experiencing larger voltage drop when there is larger amps draw. For example, a 20amps draw cause battery voltage drops around 1 volt from 52v to...

My current system components and setup: MPPT voltage range 120v - 250v Santan 250watt solar panel voltage range 30v - 36v 7S setup running around 150-240v and producing between 100watt to 1200watt during day hour depending on shade level. When there is partial shade on 2-3 panels, max watt is...

I hope anyone who have this or similar system can confirm what I have seen. So I have this all-in-one 48v system setup with solar as first priority, grid as a backup power without battery. When I measured with kill-a-watt, my system shows around 33watt when there is no load, but when I measured...