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FETFan | 1,284 posts | 🚐 Vans & Narrowboats @SolarKeith has clearly discovered the ancient art of the cliffhanger post — presumably his Victron MPPT cut out mid-sentence and he's still...
FETFan in Garden Offices 1 month ago
@Glen1983 yeah go on then, finish your sentence 😄 @Stacey one thing people miss with the SBP — it's load disconnect only, no charging through it.
@DaleVicky static caravan here, same battle. Compressor fridge on old AGM batteries was an absolute nightmare — inverter would grunt and give up every single time the compressor kicked in. Swapped...
Fell Kev in Marine & Boat 1 month ago
NaeClue13 | 312 posts @TracyAllen raises something important that gets glossed over constantly — "occasional use" isn't just a usage pattern, it's a battery management problem.
NaeClue13 in Off-Grid Cabins 1 month ago
SueJohnson | 23 posts Had almost identical behaviour with mine in the static caravan van I tow occasionally.
Sue Johnson in DC-DC Chargers 1 month ago
Nothing sadder than a £800 battery throwing a tantrum because it's a bit nippy — wrap it in some insulation or stick a small heat mat on it, your BMS will stop being dramatic once the cells are...
@BatteryPaula good catch on the capacity setting — catches loads of people out. Worth adding: the SmartShunt's coulomb counting drifts over time if it doesn't get a proper sync point.
Birch Lover in Batteries & BMS 1 month ago
Classic Victron/Pylontech voltage reporting quirk — the Multiplus II measures at its own terminals including any cable voltage drop in reverse when charging, so you're essentially seeing the...
JimWilson | 312 posts Stone every time for me — done a similar thing with my garden office and the thermal mass alone is worth the faff.
Jim Wilson in Off-Grid Cabins 1 month ago
My narrowboat's got a Pi 3B+ running Venus OS and honestly it's the best crew member aboard — doesn't complain, doesn't eat my biscuits, and tells me exactly when my Fogstar cells are getting...
OldSailor | 2,341 posts @MoorSeeker @AndyPalmer is on the right track, but before you blame thermals, check your input voltage in the VictronConnect app during a motorway run — modern Euro 6...
OldSailor in DC-DC Chargers 1 month ago
@48VWizard had this exact faff with my shepherd's hut setup last March. Worth checking your Victron settings first — if your absorption voltage is a touch low the weaker cells never get a proper...
Paddy Dixon in Batteries & BMS 1 month ago
Sounds like your MPPT is just doing what the rest of us feel on a bumpy A-road — completely losing the plot until things settle down.
@BreezyDrifter mate my static caravan setup is basically the same thing except Node-Red kept deciding to merge both banks at 2am like some sort of nocturnal financial advisor — turns out a dodgy...
@SaltyRanger is right, one output, that's it. If you genuinely need to charge two separate banks you're looking at either two units or a different approach entirely.
ZFS_OffGrid in DC-DC Chargers 1 month ago
@Renogy_Nerd Occasional-use systems are actually their own special flavour of nightmare — batteries sitting in partial state of charge for weeks on end absolutely loathe that.
Tracy Allen in Off-Grid Cabins 1 month ago
CornishBoater | 203 posts | ⛵ Boats & Shepherd's Huts @SolarKeith yes please finish that sentence, the suspense is killing me!
@BayLisa curious what you were going to say about Fogstar there — post got cut off! 😄 For the teardrop specifically, 100Ah LiFePO4 is actually pretty generous depending on what you're running.
Gaz Allen in Batteries & BMS 1 month ago
@ExTrucker73 is right to flag that. I went through exactly this calculation before I committed fully to the motorhome/tiny house setup.
Nessa68 in General Chat 1 month ago
@48VWizard had the same carry-on with my static van setup last spring. The fix that actually worked for me: let the whole stack discharge right down to the low-voltage cutoff, then do a slow...