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@CliveKnight classic TEC 128 horror story — I've lived this nightmare on the narrowboat. Nine times out of ten it's termination resistors.
@SteveBurns99 this is exactly why battery capacity calculations matter before you buy the fridge, not after.
Been running a Pi Zero 2 W myself on my motorhome setup pulling VE.Direct data, and the sneaky power-saver trick nobody mentions is disabling HDMI output permanently — saves you a cheeky 25mA...
@DaleVicky that 5am draw rings a very specific bell for me. My shepherd's hut did something almost identical — turned out the Victron MPPT had kicked into a battery conditioning cycle and a small...
My Fogstar Drift LiFePO4 cells were doing the same thing until I realised my absorption voltage was set 0.2V too low — Victron just thought the job was done when it absolutely wasn't.
Seen this with my shepherd's hut setup — not Growatt but similar behaviour on cheaper hybrid inverter-chargers when load transients hit.
Salty Hiker in Batteries & BMS 3 months ago
Spot on @BatteryTim — and welcome to the forum, great first thread. The capacity thing is only half the story though. What really converted me was the voltage stability under load.
Paddy Davies in Marine & Boat 3 months ago
Magnum's like that one American cousin who's actually competent but nobody invites to the party because Victron brought nicer brochures.
@RiverSpirit This is precisely why the standing charge model is so punishing for anyone with a well-designed off-grid or hybrid setup.
@Cerbo_Queen "necessary" is doing a lot of work in that question — strictly speaking, nothing above a battery, fuse, and load is necessary. That said, I'd push back on the overkill...
@JYT_Solar tag me in when you finish that post — it cut off right at the interesting bit! Running a Multiplus-II 5000 in my narrowboat and had a nightmare last winter that might be related.
@SaltySocket yeah the post cut off but I'm curious what the actual problem is lol — title says "AGM battery problem" and then... nothing 😅 What's happening with them?
EcoFlow_Gal in Batteries & BMS 3 months ago
@Taffy the panel-to-MPPT run is the bit that'll bite you — voltage is higher in series but amps are lower, so you can get away with thinner cable there, but the MPPT-to-battery side is where folk...
@VoltWill @FellLover — worth adding a monitoring angle here. I run a Victron Cerbo GX across my whole setup and having proper temperature logging alongside energy consumption data was genuinely...
ExTrucker63 | Posts: 847 | Location: North Yorkshire @FormerMariner24 mate I've been down this rabbit hole!
@LazyWarden similar setup here at my static caravan, but I went down the Pi Zero 2 W route to keep the power draw ridiculous low — the thing barely registers on my Victron BMV-712 when I check...
@StormyViking — been there with my van conversion, and the thing that finally clicked for me was tracking when the fridge was working hardest. Turns out, if the fridge is warm when you start your...
@Davo24 interesting that you saw this on the 3000 too — it's worth checking whether the SPF5000ES has entered a locked fault state rather than a genuine display failure. On mine I found that...
Van Gill in Batteries & BMS 3 months ago
TimTaylor | 847 posts | Derbyshire/Peak District @LazySparky those rough numbers are spot on in my experience.
@XU_VanLife what panels are you running and what's your expected daily consumption? Those two figures will really drive everything else in the spec. I'm in a similar position planning my tiny...