No worrys, my first off grid system was panels that 15 years old that I scavenged out of the tip, a mix of old front end loader and truck batteries with collapsed cells, and the cheapest eBay controlers and inverter I could find, and it did the job haha. I looked into using an old gird tie inverter as an off grid one but its pretty wild as they just keep ramping up the volts till it goes somewhere lol Also that battery scheme looks the good, why isn’t there more noise about it?