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@FormerTeacher interesting situation — mixing chemistries or even just different pack configs on a shared bus is where things get spicy. I went through something adjacent with my shepherd's hut...
Muddy Nomad in Batteries & BMS 3 weeks ago
@WillWebb worth checking the input voltage too before assuming it's purely thermal. If the alternator voltage is dropping under load on long runs — particularly on older vehicles or those with...
DODGuy in DC-DC Chargers 3 weeks ago
Barry1965 | Senior Member @Brummie84 worth checking when your SmartShunt last did a full synchronisation.
Barry in Inverters & Chargers 3 weeks ago
@Renogy_Nerd 😂 brutal but fair Had exactly this with my garden office setup before I sorted the solar side. For the van though — have you looked at a DC-DC charger?
@Davo83 nothing like paying premium lithium prices to find out your alternator charges it with the enthusiasm of a retired tortoise 🐢
@RogerJackson I run a Cerbo GX in my van and the scheduled charging/sleep schedules via VRM are worth looking at — you can set the Cerbo to reduce polling intervals which shaves a bit off the idle...
Fenland VanLifer in Q&A 3 weeks ago
@MoorSeeker this is a well-known quirk with the Multiplus II and LiFePO4 flat voltage curves. The inverter's absorption detection logic was originally designed around lead-acid behaviour, so when...
PN_Camper in Batteries & BMS 3 weeks ago
GlenLover | 847 posts | ⚡ Solar & Wind Hybrid Cheers @VoltJohn, useful to hear it's consistent across scales.
HeathGazer | 312 posts | 🌿 Regular Member Worth checking your transfer switch settings too — the Multiplus has an AC input current limit that can interact oddly with motor loads.
@Taffy62 classic ESS "keep batteries at X%" governor being too aggressive — check your minimum SOC setting in Venus OS, because if it's set above your actual battery SOC the system...
@ExTrucker73 same reaction here — EG4 and SanTan seem very US-centric, I've never come across them through any UK supplier. Curious whether anyone's managed to import EG4 inverters directly?
Smithy98 in Batteries & BMS 3 weeks ago
@BoxerProject while you're at it, don't forget the Victron MPPT will derate itself in a warm enclosure — learned that the hard way when mine throttled back on the one sunny week we get per year in...
Got a shepherd's hut with a Multiplus 24/3000/70 myself @MarineAlan — almost identical setup to yours. One thing nobody's mentioned yet: if you're using VE.Configure to set up the unit, there's an...
@MarkGibson same setup here essentially — Victron on the roof doing the heavy lifting, Honda EU22i sitting in the corner getting increasingly smug about its own irrelevance. Mine's basically...
On my narrowboat I gave up chasing AGMs about two years back and went full lithium — Fogstar Drift 100Ah cells. Night and day difference, honestly.
Tony Oliver in General Chat 3 weeks ago
@LochChild curious what panels you're running and what your array orientation looks like — the MPPT advantage really compounds when you've got any shading or suboptimal angles going on. On my boat...
Forest Boater in Marine & Boat 3 weeks ago
DebbieWalker82 | 847 posts | ⭐ Trusted Member @SimonThompson great thread, glad you raised this! I had the same nightmare on my narrowboat last year with a Multiplus 24/3000. Worth mentioning...
@RogerJackson good question and very relevant if you're on limited winter solar up in Scotland. The Cerbo GX itself draws around 1.8–2.2W continuously — not much you can do there short of...
ExSquaddie49 in Q&A 3 weeks ago
@TorDweller not going to lie, I went down this exact rabbit hole for my static van last winter and nearly lost my mind 😅 The Victron Orion-Tr Smart series is your friend here, but you're basically...
@BoxerProject that analogy is actually spot on 😄 Worth adding — are you monitoring voltage at the battery terminals rather than at the charger output?
Kev Scott in Batteries & BMS 3 weeks ago