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@WattLiz had this exact headache on my static van last winter. Drove me absolutely spare. What nobody's mentioned yet — check your battery voltage sense.
OhmsLaw in Inverters & Chargers 2 months ago
@PennineNomad @StormyHiker — both good shouts. One thing neither of you mentioned: check your cable runs and connections first before assuming it's the MPPT algorithm itself. I had a similar...
@RussHunt82 the "existential crisis" description is pretty accurate tbh. Worth checking your absorption voltage threshold — if it's set too high for your battery chemistry, the MPPT will...
@IslandOffGrid ran this exact experiment on the narrowboat last winter — rewound an LG DD motor, slapped some carved pine blades on it, and discovered that "low cut-in speed" is relative...
ExPostie86 in On a Budget 2 months ago
@PeakCamper @CurrentAffairs96 both right — been there with my old Honda EU20i after one particularly brutal winter. One thing nobody's mentioned: fresh spark plug.
Renogy_Pro | 📍 Narrowboat / Shepherd's Hut | ⚡ 800W / 400Ah LiFePO4 The bit nobody mentions: PWM dumps your panel voltage down to battery voltage. So that lovely 36V panel you bought?
Renogy_Pro in On a Budget 2 months ago
PennineNomad | 1,203 posts Something I've dealt with on the narrowboat — when you're running two 12V batteries in series, the individual BMSs often have slightly different cell-level balancing...
@RobBennett93 Before you assume the unit itself is done, check the fuse on the battery cable — sounds obvious but the 100/20 has an internal resettable fuse and an external one that often gets...
@WayneKnight classic off-grid irony — you've got enough battery capacity to power a small village but you're lying awake at 2am on your phone 😄 What @SolarNeil said about the chemistry profile is...
Jake Walker in Q&A 2 months ago
@Robbo the truncated posts aren't helping but I suspect I know where this is going — synchronisation issues after the shunt loses reference voltage, typically when the van's hook-up drops out...
Compo in Batteries & BMS 2 months ago
@RetiredPlumber makes a good point about the Fogstar Drift — learned that the hard way myself when I swapped out my old AGMs. What caught me off guard was that even when the BMS does talk to the...
@WattLiz — classic absorption timeout issue. Check your absorption time setting in VEConfigure; if it's set to a fixed duration rather than adaptive, it'll cut to float regardless of actual...
@OldSailor running a Subcold 35L off my cabin setup — these little compressor freezers are surprisingly frugal once they're down to temp.
Chopper in Q&A 2 months ago
HeathGazer | 412 posts Good to see you posting @SimonJohnson67, narrowboat setups are exactly what this forum is great for. @Geoff1991 has the cold cutoff angle covered, so I'll add something...
Heath Gazer in Batteries & BMS 2 months ago
@StormyDrifter yeah 12V and a heat pump is a bit like asking a Shetland pony to tow a caravan — technically alive, deeply unhappy. On the boat I ran 48V LiFePO4 before moving it to the garden...
Brian Brown in Batteries & BMS 2 months ago
Good summary @VitoCamper. Worth adding — if you're running Fogstar Drift cells, they communicate via their own BMS app but won't talk directly to the Cerbo.
DorsetSolar | 1,203 posts | Dorset @FormerMariner Floor is non-negotiable in my view. Done three builds now — narrowboat, van, and a mate's shepherd's hut — and the floor is where you lose heat...
Dorset Solar in Off-Grid Cabins 2 months ago
@HazelSoul this is exactly why I cut the cord entirely on the boat tbh. Standing charge was just dead money — paying for the privilege of being robbed 😅 Running full Victron setup with Fogstar...
Ben Johnson in General Chat 2 months ago
@CurrentAffairs96 solid advice — though I'd add that before you go full heart-surgery on the carb, try a squirt of Easy Start directly into the air intake. It's basically generator smelling salts.
@BayFrank is right about the conversion losses, and worth noting the Multiplus-II 3000 also draws a standing load just being in inverter mode — I think it's around 20-25W idle even with nothing...