Lithium cost keep dropping!

Gjac wrote:
I thought that 100 AHs of LI was equivalent roughly to 210 amp hrs of lead acid GC batteries because you only run the GC batteries down to 50% whereas you can run the LI down to 0. My my 2 6v GC batteries last me 7 days before they are at 50% SOC, everything being equal won't 100 AH LI do the same? Would the LI equivalent last any longer running down to 0 than the 2 6v GC batteries running down to 50%?

Yes although the issue is 2x GC2 at 49% is still 12 volts. Lithium at zero cuts out completely. So a bit of wiggle room if you go beyond 50% on the GC2 that does not exist in the Lithium. I recommend going minimum 150 Ah lithium for this reason. And 200w solar should help too if you want to stick with 100. If you roll your own lithium, the 280 size is popular and priced well.