Hi, i didn't make it clear that my original post was considering two sets of two batteries in a series parallel array. One set is advertised for use in solar systems and "forklifts" and would yield 4*55ah @ 24V. The other set is advertised as EFB Stop-Start but also says it's good for forklifts. That array would be 4*100ah @24V. The solar battery claims it can be in an idle state for two years if everything is disconnected. It may be possible to periodically charg either array but that issue can be deferred. I am more interested to know if I should use the solar or the EFB.