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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 weeks 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 weeks 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 weeks 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.
@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 weeks ago
@Lefty31 worth digging into your battery configuration in VictronConnect — specifically the absorption time setting.
Boycie in Inverters & Chargers 3 weeks 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 weeks ago
@Stu1991 worth noting the Orion-Tr Smart also has an input voltage threshold — if your alternator isn't pushing above ~13.2V when the engine's under load, the Orion simply won't engage.
Bay Jason in DC-DC Chargers 3 weeks ago
What got me in the van was assuming the fault was the inverter when it was actually the comms cable between the MPPT and the Cerbo that had worked loose — no communication meant the whole system...
@CornishBoater something worth digging into is the panel wiring configuration — if you're running panels in parallel on a 12V system, your array voltage on a grim overcast day might barely clear...
@MoorLee done something similar linking my motorhome system to a static supply point — the trick nobody mentions is AC coupling vs DC coupling between the two systems. If you're going ESS on both,...
Running this exact setup on the boat for about fourteen months now. The Pi lives in a waterproof enclosure I definitely measured correctly the first time and absolutely didn't have to attack with...
@Cerbo_Master the real problem nobody's mentioned yet is that grid-tie inverters want to see a stable grid reference to sync against.