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BarryWood | Member @PaulJackson The Daly BMS is the weak link here, frankly. It'll communicate nothing to your charger, so you're relying entirely on the BMS to hard-cut charging at full charge...
Barry Wood in Marine & Boat 2 months ago thumb_up 9
Got one on my narrowboat and went through exactly the same headache. If your Transit chassis and your habitation battery share a common negative — which they almost certainly do if you've run a...
Burn Walker in DC-DC Chargers 2 months ago thumb_up 1
Really good thread this — I had the exact same issue on my static caravan setup with a cheap shunt. What sorted it for me was switching to a Victron BMV-712.
Julie in Q&A 2 months ago thumb_up 4
@SophieClark the grounding thing tripped me up too when I fitted mine in the static van. Key thing in non-isolated mode — your chassis grounds need to be properly bonded together already,...
Midge52 in DC-DC Chargers 2 months ago thumb_up 1
Hey @Nobby, both @SolarJunkie and @Inverter_Pro have nailed the main issues, so I won't repeat them. One thing worth adding though — what's your panel orientation and roof pitch?
Cleggy51 in Q&A 2 months ago thumb_up 8
My garden office Victron reads bang-on once I actually ran proper cable to the battery terminals instead of tapping off some random point halfway down the loom — voltage drop across dodgy...
Rocky Mender in General Chat 2 months ago
@Dizzy83 running almost identical setup on my boat — Fogstar 200Ah with Victron kit managing the charging sources. The key thing that sorted mine was a Victron Battery Protect on the load side and...
Simon Thompson in Marine & Boat 2 months ago thumb_up 6
SteveGreen74 | 847 posts | ⭐ Trusted Member @Scouse16 Classic symptom of undersized cabling between your battery bank and the MultiPlus.
Steve Green in Marine & Boat 2 months ago thumb_up 7
Brummie77 | 847 posts | West Midlands @SamBennett the split charge relay is your problem right there with lithium — they're designed around lead acid charge profiles and typically cut out around...
Brummie77 in Motorhome & Campervan 2 months ago thumb_up 6
@Fogstar_Guy curious about the narrowboat setup — I'm running something similar on mine. Did you ever have issues with the mismatched panels causing your MPPT to hunt around and not settle?
Ewan Cole in On a Budget 2 months ago thumb_up 4
@WayneTaylor that's exactly how I looked at it — free inverter/charger, can't argue with that logic 😄 Been running a Smart-UPS 2200 here for about 18 months alongside my Victron setup.
NZ_Marine in General Chat 2 months ago thumb_up 7
Jim1980 | 📍 East Midlands | ⚡ Off-grid since 2015 @Ray1981 To add to what @Tom2000 was getting at about the flat voltage curve — this is exactly why coulomb counting matters so much with LiFePO4,...
Jim in Q&A 2 months ago thumb_up 5
@LDVConvert Running second-life cells on my narrowboat for two years now. Grabbed a batch of CATL prismatic cells off eBay — properly graded, not mystery lottery stuff. Key thing nobody mentions:...
ShedGenius in On a Budget 2 months ago thumb_up 1
Great thread @MarshSoul — I've spent a fair bit of time poking around JBD units and one thing worth checking that hasn't been mentioned yet is your cell delta voltage protection threshold.
Lazy Sparky in Batteries & BMS 2 months ago thumb_up 8
Noticed something annoying over the past few weeks with my 280Ah LiFePO4 bank in the van. Running a JK BMS (the 200A active balancer version) and it's been tripping the low-temperature protection...
@BatteryRay this is pretty much expected behaviour — LiFePO4 cells genuinely don't want to be charged below around 5°C, the BMS is doing its job rather than misbehaving. On the narrowboat I've...
Frosty Sailor in Motorhome & Campervan 2 months ago thumb_up 6
BorderNomad | 1,247 posts @CopperWelder been there myself — my van setup did the same thing parked up in the Borders last February, dropped to about -4°C overnight.
Border Nomad in Batteries & BMS 2 months ago thumb_up 3
ColBurns63 | 📍 North Yorkshire | Posts: 578 @DaiCole Worth checking whether your hob has a boost function that kicks in at startup — even a "1500W" ring can spike well above 2kW...
Col Burns in Inverters & Chargers 2 months ago thumb_up 6
@BatteryRay yes, same issue here with my setup. Worth checking whether your Fogstar has the low-temp charging cutoff or the low-temp discharge cutoff triggering — they're quite different problems...
Alan Palmer in Motorhome & Campervan 2 months ago thumb_up 1
BordersSolar | 156 posts @Brummie77 Worth double-checking your BMV-712's charged voltage and tail current settings — these are what tell it "right, that's 100%, reset the counter." If...
Borders Solar in Q&A 2 months ago thumb_up 2