Today we unloaded Bigbattery.com shipment and remove my dad's old lead acid batteries and installed a much better system from Bigbattery.com Condor Elite 3 battery and 3k Growatt inverter. Big thanks to Bigbattery.com for helping my dad have a solid off grid solar power system.
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https://www.youtube.com/watch?v=B8oKViMSBK0