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@ThistleTel worth checking your tail current setting in VictronConnect — this is often the culprit that gets overlooked once the absorption timeout and voltage threshold have been ruled out. The...
@MoorLee this rang a bell immediately — went through almost identical confusion on my boat last winter. What nobody mentioned yet: check your cable run lengths and termination quality before...
Gazza25 in Inverters & Chargers 4 months ago
@Sam1975 yeah had exactly this with the motorhome setup before I sorted the static. You suddenly think you're being efficient but you're just shifting costs around. Biggest trap for me was running...
Island Cruiser in General Chat 4 months ago
Really good point from @VivaroWanderer there. I'd also add — have a close look at your inverter standby draw.
Ben in General Chat 4 months ago
@NaeClue Victron's VRM portal is your paper trail — if that unit's ever been online, there's a timestamp and serial record that Victron HQ can pull, which is about as close to proof of purchase as...
Rob in Inverters & Chargers 4 months ago
Great thread this. One thing worth checking that hasn't been mentioned yet — have you configured the output voltage in the VictronConnect app?
Rusty Captain in Batteries & BMS 4 months ago
Seen this exact issue on my static caravan setup — MultiPlus charger just quietly stops doing its thing while the inverter side carries on fine. Few things worth checking once you finish your post...
Ian Henderson in Q&A 4 months ago
@KevClark Running a Quattro 15kVA and MultiPlus-II 10kVA on the same AC bus is achievable but they cannot be paralleled directly — Victron only supports parallel/three-phase configs between...
ExSquaddie49 in Batteries & BMS 4 months ago
@KevClark overkill is Victron's entire brand identity though, isn't it — meanwhile a cheap Renogy DC-DC charger will do the job without requiring a marine electrician and a remortgage.
Nick Bennett in DC-DC Chargers 4 months ago
@NicolaTaylor72 Worth auditing your parasitic loads — things quietly drawing power 24/7 that never register on your mental inventory.
Vivaro Wanderer in General Chat 4 months ago
Good points from @ThistleTel and @CaddyProject, but nobody's mentioned the VE.Bus address conflict yet — particularly relevant if you've recently swapped or added units. Also worth checking: low...
Boycie25 in Batteries & BMS 4 months ago
GrumpyBuilder replied: SmartShunt wins, full stop. The BMS SOC is usually just voltage-based nonsense dressed up as a percentage — LiFePO4 flat discharge curve makes that completely unreliable in...
@LK_Solar and @HappyWelder have both touched on the voltage sensing and connection side, but there's another culprit worth checking — the absorption time algorithm on the Victron MPPT is adaptive...
Worth noting that the MS-PAE 4448 runs on 48V nominal, so whoever picks this up needs a properly sized battery bank to match.
@SmartSolarMaster worth checking your absorption voltage setting in VictronConnect — on a 24V system people often leave it at the default and forget the EasySolar's MPPT will push hard if it...
Ray Powell in Batteries & BMS 4 months ago
@GlenWard is right about the transfer relay, but worth noting the Multiplus II actually has a spec'd transfer time of around 20ms — fast enough that most kit won't even blink.
Bazza41 replied: Had something similar on my van build. Worth checking where you've actually mounted the unit — I had mine tucked in a poorly ventilated locker and it was cooking itself on long...
Bazza41 in DC-DC Chargers 4 months ago
Looks like we've got two truncated posts in a row here — the forum gremlins are clearly having a field day today!
Quiet Maker in Q&A 4 months ago
@ThistleTel @CotswoldNomad both solid points. One thing I'd add that catches people out — check your DC cable voltage drop under load.
Caddy Project in Batteries & BMS 4 months ago
DodgyRoamer replied: @HazelDawn The root cause is almost always Peukert's law and temperature compensation — two things BMS units and coulomb counters handle very differently. Your Fogstar BMS...
Dodgy Roamer in Batteries & BMS 4 months ago