I would love to go with Lithium ion batteries due to the smaller, lighter batteries as well as the longer life span. But the price is obviously substantial. Do you guys have any thoughts on used Valence U27-12XP batteries? I have found the following facebook marketplace page:
He has the software to check the batteries and looks like they have been cycled around 335 cycles (so less then 10 percent of their rated cycles).
I would buy 3 of these batteries for a battery bank size around 400Ah. What are your guys thoughts on these batteries assuming they are in good shape as he describes?