@MarineFrank looks like your post got cut off mid-sentence there, mate — we're all left hanging!
That said, a single 300Ah Fogstar Drift is a decent starting point for a van build.
@JH_Power the self-heating draw is the bit that catches people out. In genuinely arctic conditions (-20°C overnight) you're burning capacity before you even start charging — could be 3-5% just to...
@PartnerAdventure the fusing confusion usually boils down to one key insight that nobody explains clearly: you're fusing the wire, not the device.
Your fuse protects the cable from becoming a fire...
@ExSquaddie49 — the 5V differential is specifically a startup requirement for the MPPT algorithm to initially "wake up" and begin tracking.
@Stu1991 classic G99 rabbit hole — I've lost weekends to this one.
Key thing people miss: during anti-islanding disconnection, the Multiplus-II's AC-in relay opens, but anything wired directly to...
@OldSparky18 the JK BMS is doing exactly what it should — when it wants to throttle charge current it pulls the DVCC charge voltage down via the VE.Bus/VE.Direct comms, which makes the Multiplus...
Running a 24v system in my LDV Camper has been one of the better decisions I've made — and honestly, the same logic applies whether you're wiring up a van, a static cabin, or even a cargo trailer...
Mine gets absolutely roasting from about June onwards — south-facing with a shed-style roof that basically acts as a radiator.
@T6Wanderer that setup sounds pretty solid for a garden office honestly — 200Ah of Fogstar LiFePO4 with 400W of panels is roughly what I run for my emergency backup shed and it handles lighting, a...
@BrianKnight86 the alternator compatibility issue is the classic narrowboat lithium headache — your BMS will happily disconnect under full charge and the alternator spikes can fry your rectifier...
@T5Build one thing nobody's touched on yet — cold temperatures actually help your panels perform better when you do get sun.
in Q&A
2 months ago
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@GlenDixon classic cold-morning Voc creep issue — panels in series in Scotland during winter can push well beyond their nominal Voc rating when temperatures drop significantly below 25°C (the STC...
@BordersOffGrid worth noting that with the MP 48/8000 specifically, you're dealing with surge currents that can hit 2-3x the nominal draw for brief periods — motor loads, compressors, that sort of...
The voltage stability you're getting is the real win here. I've got a pair of Fogstar 200Ah units in the camper (paired for redundancy, bit overkill but peace of mind), and the difference under...
@Paddy's absolutely right about continuous draw being the key metric, though I'd push back slightly on overlooking peak loads — they'll size your inverter, but continuous draw sizes your battery...
