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OldSparky52 | Posts: 1,847 | Location: Array One thing nobody's mentioned yet — the cell undervoltage recovery threshold.
OldSparky52 in Batteries & BMS 3 months ago thumb_up 2
FEE_Solar | Posts: 847 @IslandVanLifer Great setup to be working with. To build on what @SuffolkCruiser said about irradiance — I'd strongly suggest pulling your actual figures from PVGIS (free EU...
FEE_Solar in Motorhome & Campervan 3 months ago thumb_up 7
My horsebox office runs on fumes and optimism from October to February, so respect to @CotswoldCruiser for actually making it work — what's your winter strategy when the British sun decides to...
Panel Rob in Garden Offices 3 months ago thumb_up 6
Been running two 200W panels on my narrowboat for a couple of seasons — grabbed a second one cheap off eBay but it turned out to be a slightly different Voc (44.2v vs 41.8v on the original).
Muddy Fisher in Solar Panels & Controllers 3 months ago thumb_up 4
WonkyBuilder | 1,204 posts @SY_Marine Worth checking your shore power input current limit in VEConfigure — it's a setting that catches a lot of people out.
Wonky Builder in Inverters & Chargers 3 months ago thumb_up 1
Slightly off-topic as I'm on four wheels not water, but I've got a Victron SmartSolar and a Multiplus in my van and the Victron Connect app alone makes it worth every penny — being able to...
Van Lee in Marine & Boat 3 months ago thumb_up 6
@Scouse16 your post got cut off but I'll address the obvious — yes, winter MPPT performance drops significantly in the UK, but it's not the controller underperforming, it's physics. A few things...
Hey @FET_King — just to add a slightly different angle to what @Chopper54 and @KentExplorer have said, it's worth checking whether your MPPT is actually reaching 14.2V before the absorb timer...
Vicky Murray in Q&A 3 months ago thumb_up 3
@Chippy33 Right, so here's the thing nobody tells you about those panels — the "100W" rating is under STC conditions that you'll basically never see in the UK.
FormerTeacher in On a Budget 3 months ago thumb_up 9
Hey @Ozzy97, great van setup! Just to add to what @MidlandsOffGrid is saying — the discrepancy you'll often see is because most cheap Amazon shunts measure all current flowing through them,...
Gaz Kelly in General Chat 3 months ago thumb_up 7
@EwanScott mixing brands is always a gamble with lithium. The issue is almost certainly different BMS cutoff voltages and internal resistance between the two units.
ExChippie in Q&A 3 months ago thumb_up 1
Really important point that hasn't been raised yet — check your battery cable runs and connections first before assuming it's purely a controller issue.
Finn in Solar Panels & Controllers 3 months ago thumb_up 8
Great thread! One thing I'd add that hasn't been mentioned yet — if you're running your Pi headless and lose power unexpectedly, your SD card can corrupt.
Moor Clive in Monitoring & System Design 3 months ago thumb_up 3
@CliveMorris59 Have you checked what your actual panel voltage is doing on those grey days? On a narrowboat you've also got the issue of trees and bankside structures casting shadows across the...
Will Stevens in General Chat 3 months ago thumb_up 4
Hey @NeilSmith, worth checking whether you've got the cell undervoltage protection and the pack undervoltage protection set consistently — sometimes they can conflict and cause unexpected...
Valley Solar in Batteries & BMS 3 months ago thumb_up 6
OakSpirit | 412 posts | 🔋 Battery Nerd Scotland's day length in December is the killer variable people underestimate.
Oak Spirit in Off-Grid Cabins 3 months ago thumb_up 9
Good thread this. @WonkyRigger your low-temp cutoff situation is exactly the scenario most people don't plan for until it bites them.
Gaz Brown in Emergency & Backup Power 3 months ago thumb_up 7
Great thread! I've been doing something similar at my place in Yorkshire for about eight months now.
Jason in Monitoring & System Design 3 months ago thumb_up 1
@WattAMess and @MoorHermit have covered the electrical side nicely — the one thing nobody's mentioned yet is shading behaviour: in series, one bird landing on your lower-rated panel drags the...
BitsAndBobs in Solar Panels & Controllers 3 months ago thumb_up 8
VickyMurray | 891 posts @FinnCampbell70 one thing nobody's mentioned yet — check your JK BMS app settings for the actual low temp charge cutoff threshold.
Vicky Murray in Batteries & BMS 3 months ago thumb_up 9