I have a 12V 100ah Renogy battery with Bluetooth with no heater. Cell one is giving me an under voltage warning and this thing has only ever been light duty. Running a couple of LED lights sometimes and charging a few tool batteries. The entire system is Renogy and thus far I’ve been a fan. It has been climate controlled and babied its whole life. Now that cell one appears to be failing about 10 months outside of its three-year warranty. Renogy offered me 6% off a new battery. I pushed back and they said they’d go as high as 10% but understood if I need to search elsewhere. This is despite the fact that I’ve been helping friends set up systems like mine since I built it. That said I’m pretty sorely disappointed with them. I also pointed out that I planned on buying a new battery recently so that I could upgrade the system and wouldn’t mind buying two at once with a little incentive from them.
I have a 30 amp rover controller with 400 W of panels and a 700 W inverter. I’m searching wisdom on batteries. I want this to be a system that I can upgrade overtime by adding more batteries and adding more panels and will upgrade the other equipment as needed to handle the greater loads. Needless to say after this experience, I doubt I will be using Renogy. Also, I want to be able to pipe info into home assistant so I can monitor the system from the main house. Open to any ideas you all could provide. Thanks in advance!