I’ve looked at the harbor freight system - seems well thought out and practical. I’ve currently added a 5.28kW solar system for the house and am looking to see how to integate a battery bank since if the utility loses power, my solar system is blocked. There are plans for a modifictation where they will switch automatically to teh battery bank and maintain the charge with the solar panels.
Solar panels won’t do much if a big volcano goes. Just saying.