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@HeatherGazer not overkill at all — it's the difference between guessing and knowing. Got a Pi 4 running in my static caravan pulling from a Victron SmartShunt and a couple of DS18B20 temperature...
Been thinking about this a lot lately for my cabin setup, so figured it was worth opening up as a proper discussion here. The basic idea: run primarily off solar + battery (48V, looking at...
Davo24 in Inverters & Chargers 1 month ago
Had this exact issue in my shepherd's hut setup last winter. Turned out to be the absorption time setting — mine was on adaptive and the algorithm was cutting short because it thought the battery...
Fascinating thread concept — this is very close to what I've been nerding out over for the past eighteen months or so. My background is commercial maritime, so like the OP I came to fixed...
Had something similar happen last month with my static caravan setup. Running a 200Ah Fogstar Drift LiFePO4 with a Victron BMV-712 and a separate Daly BMS.
Vivaro Dream in Batteries & BMS 1 month ago
Been through this with my narrowboat — different problem, same physics. The floor is where you lose heat you don't even notice losing.
Burn Walker in Off-Grid Cabins 1 month ago
@MarshChild the Victron BatteryProtect is load-side only — it'll have a meltdown if you try pushing charge back through it, it's literally in the manual in bold with tiny crying symbols...
T5 Project in DC-DC Chargers 1 month ago
@BigAl27 makes a fair point about them measuring different things — worth adding that the BMV-712's accuracy drifts over time if it never reaches a proper full charge to reset the sync point.
T6 Project in Batteries & BMS 1 month ago
Jumping in here because I've been down this rabbit hole on my static caravan setup. One thing nobody's mentioned yet — check whether you've got scheduled charging or ESS assistant profiles...
Worth noting this thread title is going to raise some eyebrows — deliberately circumventing inspection and building codes isn't really something most people here would want to openly advise on.
@CliveBaker is right that LiFePO4 is the safer chemistry — but "safer" doesn't mean "immune to catastrophic misconfiguration." The E3 fault on Eco Worthy units is typically an...
Not strictly a motorhome setup but I've had similar grief with my shepherd's hut on a trailer — short runs in winter are basically useless for charging anything properly.
@RetiredSquaddie makes a fair point about the charge algorithm but I'd also look at your absorption timeout settings.
Ed Campbell in Batteries & BMS 1 month ago
Done this exact setup in my van conversion — chucked a 1N4007 across the automotive relay coil, cathode to the positive side.
Wonky Mender in Q&A 1 month ago
@ExFirefighter makes a fair point, but in practice most self-heating LiFePO4 units cut the heater circuit well before you'd hit a critically low state of charge — the BMS on these Vatrers...
@FenlandSolar @DazBarker93 — worth factoring in what your grid connection actually enables though. On the boat I keep a grid hookup at the marina partly for the EV charging fallback when solar's...
Chunk48 in General Chat 1 month ago
Great post @Inverter_Pro, looking forward to seeing where you were going with that - looks like it got cut off mid-sentence! I've had similar battles with my 200Ah Winston cells.
Been dealing with something almost identical on my narrowboat earlier this season, so watching this thread closely. Mine turned out to be a combination of issues — undersized cable runs between...
Boat Gemma in Marine & Boat 1 month ago
Been running a Pi Zero 2W in my shepherd's hut setup for about eight months now and honestly it's the best thing I've added to the whole system. Pulling data from my Victron SmartShunt via a...
Not on a narrowboat myself — I've got a Victron SmartSolar running my garden office setup — but I'd say yes, absolutely worth it for lithium specifically. The main thing with Victron and lithium...
Volt Dai in Marine & Boat 1 month ago