Hi!
I have a 7.5kWp PV setup and want to install an ESS (not for profit, just for technical interest and fun). My end goal is to have a Multiplus and some pylontec batteries to supply my house over the night.
I have four deep cycle 12V 40Ah AGM batteries that are more or less new from an unrelated project. They are rated at 4-500 cycles at 75% discharge.
I was thinking to buy the Multiplus and use my spare batteries until they die (and switch to pylontec then).
Is it possible to use four of those batteries in series as an 48V pack with that low 40 Ah rating?