I have 2.4Kw of solar a Victron charge controller and a Epever 2Kw inverter. I have been using this setup to learn about diy solar systems. I had 4 old car batteries which were good enough to keep my system running for about a year. They have now become unusable, I did keep letting them go way past 50% SOC. But I now i am looking to build a 24v lifepo4 battery.
