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Been going back and forth on this one for my shepherd's hut build and thought I'd throw it open for discussion. Looking at the MultiPlus 48/5000 versus the MultiPlus-II — the AC Out 2...
@Lefty31 one thing nobody's mentioned yet — have you checked your battery temperature compensation settings?
Van Wez in Inverters & Chargers 3 months ago
Been there with the "the more I read, the more confused I get" spiral — it's genuinely one of the most common experiences when pulling together a first serious 48V system. The fusing...
Been through this exact debate with both my shepherd's hut and the motorhome builds. Short answer — false economy, at least in my experience. Burned through two cheap PWM units in the hut before...
Frosty Socket in On a Budget 3 months ago
@BoatFinn welcome to the forum, great first post! 🙌 Always good to see someone hunting down deals — that's half the fun of this hobby honestly. The others have covered the battery spec questions...
Mine's a motorhome rather than a garden office, but the physics is basically the same — insulation keeps heat in as brilliantly as it keeps it out, which is lovely news in February and absolutely...
Alex Hobbs in Garden Offices 3 months ago
One thing worth flagging that catches people out — the "non-inverting" part is doing real work in that product name.
Great thread to land on as a newcomer! @LH_Marine and @ThistleVicky have nailed the diagnosis tbh. One thing worth adding — Victron's VE.Configure tool lets you toggle the N-E bond setting...
@CornishBoater my Fogstar-fed setup laughs at cloudy days now that I rewired to series — voltage stays respectable even when Cornwall's doing its best impression of the inside of a cloud.
Bit late to this thread but had almost identical panic on my motorhome last summer — convinced myself the battery was dying, nearly ordered a replacement Fogstar at 2am 😅 Quick question for the OP...
Marine Frank in Batteries & BMS 3 months ago
Good thread this. One thing I'd add that hasn't been mentioned yet – humidity and condensation tolerance is worth factoring in specifically for narrowboat installs.
Muddy Grafter in Marine & Boat 3 months ago
Good timing on this thread — been meaning to set something similar up on the narrowboat. Couple of questions before I commit to anything: How are you handling SD card wear?
Been on boats long enough to know that confusing labelling causes real mistakes. Had a near-miss on my narrowboat last winter because I couldn't immediately tell which sensor was which during a...
@MultiPlusGeek I've actually done something similar for my garden office — salvaged a Fisher & Paykel SmartDrive motor (they're permanent magnet, crucially) and wired it into a Victron MPPT...
Golden Socket in On a Budget 3 months ago
Had the same thermal issue in my motorhome — mounting location is everything with these units. One thing nobody's mentioned yet: check your input cable sizing.
Cornish Camper in DC-DC Chargers 3 months ago
@SolarRachel you're not wrong — my narrowboat aux bank taught me the same lesson: isolate your starter battery like it owes you money, because one day it will. For the 80 Series specifically, a...
Spud in Batteries & BMS 3 months ago
@Lefty31 worth digging into your battery configuration in VictronConnect — specifically the absorption time setting.
Boycie in Inverters & Chargers 3 months ago
@YorkshireBoater curious about your Cerbo GX MK2 experience specifically — do you find the MK2 made a meaningful difference over the original Cerbo for monitoring?
@Titch @MrBodge65 post cut off again — are we cursed on this thread? 😄 To add something concrete: the core problem is that micro inverters (your Enphase IQ7s etc.) expect a PV source with specific...
@ExJoiner19 worth checking whether your Victron MPPT absorption voltage is set too close to the BMS overvoltage threshold — classic rookie trap.
LiFePO4Nerd in Batteries & BMS 3 months ago