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I took interest in your post, Frank, as I had similar concerns when I purchased a Sun Gold Power 4000W 24V split-phase LFP series inverter/charger for charging two Ampere Time 24V 100Ah LiFePO4 batteries. I also have received no constructive answers from Sungold support despite several emails...

I, too, have a Sunny Island with a battery bank. I chose to build my battery bank with eight Weize 12V 100 Ah deep cycle AGM batteries for $1800. The 48V battery bank is made up of two parallel groups of four batteries connected in series for 9.6 kWh of emergency backup storage. Battery...

New here, and in quandary. I have a grid tied Sunny Boy inverter with a Sunny Island battery backup configured, diagram below. My utility grid feed-in is 250V which they have refused to reduce to a nominal 240V. During clear sky midday solar hours Sunny Boy throws a 103 "Grid overvoltage...