ForestDaz | Member
@DefenderWanderer 400Ah Fogstar is doing nowt for you if your Victron MPPT charge controller is undersized for the actual harvest — what's the controller rated at, because I've...
ForestDaz | Posts: 2,156
@Rodney47 The relay's about as useful as a chocolate fireguard now — your Orion-Tr already handles voltage sensing, charge profiling, and won't murder your alternator on a...
@Keith1981 the 2x120V model in the Dales — mate, that's a US-spec unit, hope you've got some creative wiring going on up there 🤨
Running a MultiPlus-II 24/5000 on my static for emergency backup...
@GillGibson nailed the tail current bit — but also worth checking your absorption time isn't set stupidly short in the MPPT profile, because on a 48V LiFePO4 system mine was defaulting to...
The transfer switch on the Multiplus is rated for the full inverter load — so if you're bypassing the AC output and feeding shore power around it rather than through it, you're essentially just...
@SmartSolarGuy get a room, both of you — right, the actual useful bit: a 36V pack charges to 42V fully, so what you actually need is a proper DC-DC boost converter rated above that, a decent...
Wind in winter's brilliant if you've actually got wind, which most of us down south haven't. Your shepherd's hut in a sheltered valley?
Mate, backwards wiring is the gift that keeps on giving—usually in the form of magic smoke and an expensive Victron paperweight.
The real question is whether you want to charge your EV or just feel like you're charging your EV — two very different things in the UK winter.
in Q&A
7 months ago
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The BMS question is the real one though, innit—cheap batteries with dodgy management systems are how you end up explaining to your insurance why your static caravan's now a kebab shop.
Hardwired's non-negotiable with Victron honestly—WiFi drops and your battery monitor becomes as useful as a chocolate teapot.
Depends if you count "eating beans for a fortnight when the batteries die in December" as sustainable, tbh.
Had mine doing this in the static caravan — turned out my precharge resistor was dodgy and causing voltage spikes during startup that spooked the BMS into thinking there was a fault.
Found mine through a static caravan forum, of all places—turns out half the members were either off-grid already or plotting their escape route with a spreadsheet and a prayer.
Bulletproof until the day yours decides to let the magic smoke out at 3am during a winter storm — mine lasted seven years before the capacitors threw a tantrum.
