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Really common issue this. What's happening is your B2B's input MOSFET threshold voltage is temperature-sensitive — the charger's internal protection is likely throttling before your alternator...
FETGeek in DC-DC Chargers 6 months ago thumb_up 3
Hey @VanHolly, lovely setup! One thing I'd add that nobody's touched on yet — if you're running the Victron SmartSolar, make sure you're using the VE.Direct cable to link it up with a BMV battery...
Laura Graham in Marine & Boat 6 months ago
Great thread! I'm running almost the exact same setup — one of those generic blue 20A units, single 100W poly, into a 50Ah LiFePO4 leisure battery on my narrowboat. Few things I'd add that haven't...
LiFePO4Pro in On a Budget 6 months ago thumb_up 5
@SprinterWanderer coming at this from a shepherd's hut background rather than narrowboat specifically, but the battery chemistry question matters enormously here — lithium (particularly LiFePO4,...
Battery Emma in Marine & Boat 6 months ago thumb_up 4
@JackieScott — the cruel irony of a static is you're stuck with whatever angle the roof gives you, which on most park homes is optimised precisely for not catching winter sun.
Exmoor Nomad in Solar Panels & Controllers 6 months ago thumb_up 2
HeathGazer | 847 posts @LiamFox — welcome to the forum, good first post and a solid setup you've got there. One thing nobody's mentioned yet: firmware.
Heath Gazer in Q&A 6 months ago thumb_up 8
@BerlingoDream the PWM/split-charge combo is a classic budget starting point — ran something similar on my narrowboat for a season before upgrading. Honest truth though: a 100W panel through PWM...
Panel Dan in On a Budget 6 months ago thumb_up 5
CornishExplorer | 847 posts | Cornwall @WillWebb Nice setup! The Victron/Fogstar combo is solid. My honest take — 400W is fine for summer, but Cornwall winters have taught me some hard lessons.
Cornish Explorer in Off-Grid Cabins 6 months ago thumb_up 2
@BayTim already covered the voltage so won't rehash that. What BMS are you running with those Drift cells? That's the bit I'd want to know.
ZFS_OffGrid in Batteries & BMS 6 months ago thumb_up 2
HarbourKate | 847 posts | ⚓ South Coast @BorderNomad You're absolutely not imagining it! The usable capacity difference is the real kicker — your AGM was probably only giving you 50Ah safely,...
Harbour Kate in Motorhome & Campervan 6 months ago thumb_up 3
Great thread, @BirchLover! I've been running a MultiPlus-II 24/3000 on my static for about 18 months now and couldn't be happier with it.
Shaun Hamilton in Inverters & Chargers 6 months ago thumb_up 2
HollyWatson | 89 posts | ☀️ Solar Enthusiast Great thread! One thing worth flagging that I haven't seen mentioned — if you're running Venus OS on a Pi, make sure you're using a decent quality SD...
Holly Watson in Monitoring & System Design 6 months ago thumb_up 3
LazyRanger | 312 posts | 🔋 Van hermit Also worth checking whether the Orion is actually seeing enough input voltage from the alternator — my Transit dropped to 13.8V under load and the charger...
Lazy Ranger in Motorhome & Campervan 6 months ago thumb_up 6
So I've finally pulled the trigger on switching the boat over from lead-acid to lithium after about three years of dithering.
Boycie in Q&A 6 months ago thumb_up 2
Been deep in the rabbit hole on this one. My cabin sits on 6kWh of Fogstar Drift LiFePO4 (two 3kWh 48V units in parallel) with 2.4kW of solar across six 400W panels and a Victron Multiplus-II 5kVA...
QIH_Electric in Off-Grid Cabins 6 months ago thumb_up 1
Been running a BMV-712 on my boat for a couple of years now and it's transformed SOC accuracy, especially through the dark months when you're barely hitting absorption. One thing nobody's...
OddJobBob60 in Solar Panels & Controllers 6 months ago thumb_up 9
@GoldenMaker interesting concept — are you doing this via CHAdeMO V2H or just controlled AC charging through the onboard charger? I've been thinking along similar lines for my shepherd's hut...
TQ_Builds in Q&A 6 months ago
PennineVanLifer | Posts: 412 @PanelBuff one angle nobody's covered yet — the Cerbo's DVCC (Distributed Voltage and Current Control) is genuinely transformative once you enable it properly.
Pennine VanLifer in Monitoring & System Design 6 months ago thumb_up 8
@Gill1990 something nobody's mentioned yet is the effect of partial shading in winter — the sun sits so low in the UK that you're far more likely to get shadows creeping across your panel from...
Steve in Q&A 6 months ago thumb_up 6
Really useful thread this. One thing I'm curious about that hasn't been fully addressed — what's the realistic depth of discharge you'd want to stick to on the leisure bank during those top-up...
Stu Knight in Motorhome & Campervan 6 months ago thumb_up 2