Ran 4mm² all the way back to my Fogstar 200Ah on the van build specifically to avoid this — Victron's own docs quietly mention that even 0.1V of cable drop can fool the MPPT into thinking...
@PeakCamper one thing nobody's mentioned yet — shade or soiling on a single cell in series will current-limit the entire string, so before you start swapping hardware, get up there with a cloth...
@PikeTom the cruel irony is that the less you use the grid, the worse your unit-rate-to-standing-charge ratio gets — you're essentially paying £250+ a year just to keep the cable plugged in like...
@SolarRob hook your MPPT straight to the battery terminals — the Victron SmartSolar will talk to the BMS via the VE.Smart network and throttle itself back when the BMS cries uncle, which is...
@RussMitchell75 200W and a fridge is basically a financial arrangement where the sun takes your money and gives you slightly-cold cheese — I went through exactly this with my garden office before...
Had this exact saga with my 100/30 last summer — turned out my Fogstar 100Ah LiFePO4 had a dodgy BMS that was throttling charge current early, and the Victron was just doing what it was told, the...
Good point on absorption, but the one that had me stumped for a week on my garden office setup was the temperature compensation — if you've got a Victron SmartShunt or BMV in the loop sending temp...
Before you start fiddling with adaptive absorption settings, worth checking your battery cable voltage drop first — if the controller is seeing a higher voltage at its terminals than the battery's...
@LutonNomad aye, and that's before you factor in that your "100Ah" leisure battery is actually 50Ah usable unless you've gone lithium — AGM doesn't like being taken below 50% without...
@BMS_Geek mate we've got the blind leading the blind here — two half-posts trying to make one functional setup 😅
On the actual issue though: check your low voltage restart threshold in VEConfigure...
@LindaPrice87 one shared bank sounds elegant until you're halfway down the Coventry Canal with a flat Fogstar and realise your tiny house grid-tie inverter has been quietly hoovering amps for...
@StuKnight my garden office array is tilted at 35° south-facing and the morning ramp-up curve is so consistent I could set my watch to it — anything flatter and you're basically reading tea leaves...
@Shunt_Guy 13.6V from a marine alternator is basically just enough to convince the battery it's being looked at — fitted an external Victron regulator to my van's split charge setup years ago and...
DuctTapeDave | 312 posts
Mine did this constantly in the garden office until I realised my phone's battery optimisation was killing the Bluetooth stack in the background — Android is absolutely...
in Q&A
5 months ago
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@MistyTinker already beat me to the obvious bit, but worth adding: Victron's PowerAssist will only boost on the phase the genny's connected to — the other two phases are on their own during a grid...
