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You could use an MPPT charge controller to get maximum power out of the Solar panel and generate a 48V output and then use a DC to DC converter to convert that 48V to 180VDC....but that is what the first stage of that inverter would have done. :-) I cant think of an easy solution other than a...

I came across an additional study published in March of this year that does testing on LFP batteries repeatedly charged at −10 °C so I wanted to update this thread. This study focused on overcharging and so they used relatively high cutoff voltages of 3.65V, 4.0V, 4.4V, and 4.8V. They used CC-CV...

Do you have a kill-a-watt meter or a clamp meter to measure actual current? This would be very useful for your tests but I understand you don't have more money to spend on this project. With a clamp meter (~$40) you can measure the actual solar output by measuring the DC current with the clamp...

So are you sure that 11.05 amps is the peak and there aren't' short bursts that are higher?

Good to know. Definitely low temp protection then.