by Al510 » Wed May 01, 2019 7:11 pm
Im planning on the winston cells as well, for my main battery, but in the 400ah. The bms that i liked the look of was the ev power one from WA. But the cost would be similar to the electrodacus sbms. It might be worth forgoing the small percentage gain from the mppt and get the sbms120 for my main battery.
I think the victron float can go as low as you want. It definitely goes as low as 13.3, i didn't try any lower.
Im not too concerned about how this 12v battery behaves on the solar charger, it will only have a small load on it and hopefully lasts a few years, if not i will replace it when the time comes. I was more interested in why the voltage rises so fast to 13.8v when in bulk mode, even though its nowhere near fully charged, and if a larger pack of cells will do the same thing.
With your sbms, the cutoff voltage being 3.55v per cell, it switches the pv of then? At what voltage does it drop to before switching back on?
I have connected my fridge to the 12v battery, and I'll run it down to 20% soc and see how it goes on the victron with a reduced current, maybe 10amps.