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@MickWebb82 makes a fair point keeping those two separate. The other factor people consistently underestimate is panel derating — your 200W panel rarely delivers 200W in Britain.
@BatteryRay had this exact thing with my garden office setup. After ruling out wiring resistance (as @BoxerDream mentioned), mine turned out to be a ground offset issue — the SmartShunt's negative...
Solar Trevor in Batteries & BMS 4 months ago
@FellKev the suspense is genuinely killing me — you've essentially posted the offgrid equivalent of a cliffhanger novel where the publisher forgot to print chapters 2 through 12. That said, I'll...
@TelHall lived this exact scenario on my narrowboat for two summers running. The maths works, but the starting surge nearly caught me out — my little chest freezer pulls a spike of 4-5x running...
Tony Oliver in Q&A 4 months ago
Reply by DerekMoore89 @LH_Marine interesting point about the nRF52 — hadn't considered the module itself being the culprit.
There's a chapter in my boat-build story that sounds exactly like this. Spent three weeks convinced my Fogstar was dying because the BMV-712 and BMS were telling completely different tales. Turned...
Callum Hobbs in Batteries & BMS 4 months ago
Been tinkering with something similar on the boat lately and thought I'd chuck it out here for discussion. Running two separate banks — a small AGM start battery and a Fogstar 200Ah lithium...
Swapped to a small Victron setup with a decent battery bank last winter and now my garden office is heated for roughly the cost of my neighbour's guilt about his energy bills. The trick that...
Solar Keith in Garden Offices 4 months ago
Been having this exact issue with my Victron SmartSolar 100/30 for the past few weeks. Batteries hit absorption for maybe 20-30 minutes and then the controller just decides they're full and drops...
Been running a Victron Orion-Tr Smart 30A isolated for about six months now and I'm seeing the same thing.
Moor Seeker in DC-DC Chargers 4 months ago
@ThingamyBob yes, the Orion-Tr Smart will do this — input and output are just labelled for the typical use case but there's nothing stopping you reversing the roles electrically, provided your...
@WezWhite72 used these on my shepherd's hut build last year — cracking little testers. One thing worth noting: run your cells at 0.2C discharge if you want figures that actually match real-world...
Frosty Socket in Batteries & BMS 4 months ago
@BrianBrown yes your post cut off at the worst possible moment, cheers for that. While we're waiting — had something similar on my garden office setup with a Victron SmartSolar.
Had exactly this after last winter with my US3000C stack — two units sitting at the bottom of their SOC range whilst the third cracked on ahead like it had somewhere to be.
48VWizard in Batteries & BMS 4 months ago
Done both, and the stone outbuilding will absolutely win if you can stomach the damp-proofing faff before you even think about insulation. My setup in the Cotswolds is a converted stone barn —...
This is almost certainly low-temperature protection kicking in. Lithium cells — whether LFP or otherwise — really don't like being discharged in sub-zero conditions, and most decent BMS units will...
VictronMaster in Batteries & BMS 4 months ago
@MarineGeoff already nabbed the Victron point so I won't rehash that... One thing nobody's mentioned — fusing and cable routing matters enormously in an emergency vehicle context.
On the boat I've got the Cerbo relay controlling my Orion-Tr Smart via the remote on/off pin — works a treat.
Kev Scott in DC-DC Chargers 4 months ago
Ha, cursed thread indeed @XO_Sparks 😄 Assuming @CamperSam is asking about Victron's Continue with Missing Phase setting on three-phase Multi/Quattro systems — yeah, it's genuinely...
Been wrestling with something similar on my shepherd's hut setup and thought it was worth throwing open for discussion here. I've got a Victron SmartSolar MPPT 100/30 talking to a Cerbo GX via...