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Whangler's avatar
Whangler
Explorer II
Dec 01, 2020

Anybody run Lithium battery bank with solar

I'm considering upgrading my solar and battery bank. On my Arctic Fox 25r trailer, I currently have a 160 watt zamp panel on the roof with a 30a zamp pwm controller. Additionally there are two 100 watt panels I place on the ground with a victron 15a mppt controller. Two 225a AGM batteries are 10 months old.
The panel wattage seems to be adequate, the batteries are up to 12.6 by afternoon, however the battery voltage is about 11.9 in the mornings after a night with 2 cpap machines running. The ugly truth, is that I need more ah in my bank.

So, my question is to those running solar / lithium with all the fixins: mppt controller, battery monitor /shunt, inverter, etc.

This looks like a pretty complex system with many possible electronic components that could fail. How do you like it? Had any problems with it?

From my calculations, I use just over 200 ah per day. That's gonna cost me an arm, and possibly a leg to implement that new system. Battle Born-Zamp-Victron seems like a sure fire combo. What are you using?

ThanksQ
  • 48v 100ah li pack, big inverter, 800ah solar, victron monitor.
  • May I suggest going to the mobile-solarpower.com web site? Will Prowse has developed a LOT of expertise in the solar power field.

    I'm not running lithium batteries, but I am fairly certain that your 360 watt array is not adequate for the task. That certainly won't get you 200 AH of power reliably. This is pretty much certain given your max voltage of 12.6 volts on your existing battery pack.

    I am running with a pair of 125 AH AGM batteries, and they aren't fully charged until up to 13.0 volts. But this depends on how you are measuring that voltage. Is it via a VOM when they are disconnected from any load? Or is it by use of a battery monitor of some sort? If the latter, does your system contain a shunt? Or is it just the display from that MPPT controller?