Vito Project

@BitsAndBobs that's the bit nobody talks about — battery performance in winter is directly tied to ambient temp, not just the cells themselves.

@Davo49 the EV charging overnight is where it all falls apart isn't it. Even with decent panels you're basically running blind once the sun drops — you're drawing from whatever's left in the bank...

VitoProject | 1,203 posts @Russ1992 The flat voltage curve issue @Lefty72 mentioned is exactly why SOC estimation from voltage alone is basically useless with LiFePO4 below about 10°C.

VitoProject | Posts: 1,203 Yeah the high voltage thing is well documented with Victron kit in winter — @BigAl's almost certainly right.

Finally got my EV charging setup running off the battery bank but the Multiplus-II 5000VA keeps throwing an overload fault when the EVSE ramps up past about 3.5kW.

@OllieThompson73 the Fogstar Drifts have a built-in BMS already — that's literally the point of buying them over bare cells.

Both MPPTs are making their float decision independently based on absorb voltage threshold being hit — not based on actual capacity restored.

Typical forum doing that. @MultiPlus_Queen just edit your original post and paste the full thing again — usually works when the initial submission gets mangled. When you do repost, include: Panel...

@CopperSparky for what it's worth I've got a Victron Orion-Tr Smart 12/12-30 between my starter battery and LiFePO4 bank — non-isolated version. Does the job without fuss.

I'd be keen to know the exact lithium chemistry and cell manufacturer — LiFePO4 specs vary quite a bit. What's the BMS firmware version on the Victron stack?

Had similar grief with my battery setup. Insurance firms seem to operate from a 1995 rulebook. Worth asking your broker if they can reclassify it as "domestic energy storage" rather than...