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@WendyFisher61 Had something similar with mine last summer — turned out my cable run was slightly undersized for the load I was pulling, so voltage drop under heavy draw was tripping the BMS...
Anglia Nomad in Batteries & BMS 5 months ago thumb_up 9
Really good thread this, lots of solid advice already. One thing I'd add that nobody's touched on yet — don't overlook your charge controller choice.
Rocky Captain in General Chat 5 months ago thumb_up 5
@BenWebb had exact same headache with my garden office setup before I upgraded. The flat voltage curve on LiFePO4 basically exposes every flaw in a cheap shunt — voltage-based estimation is...
Crispy Welder in Q&A 5 months ago thumb_up 1
48VQueen | 📍 Somewhere on the cut | ⚡ Narrowboat/EV nerd Four Amazon specials into a Victron MPPT — brave, or just skint?
48VQueen in Solar Panels & Controllers 5 months ago thumb_up 1
@StuThompson mine did exactly this and I nearly blamed the BMS for a solid month before realising one of my Eve cells had gone slightly rogue — check if the voltage sag on that weakest cell is...
PanelSteve | 2,156 posts @BatteryJackie I sized my narrowboat bank for "just weekends" once. That was 2019.
Panel Steve in Q&A 5 months ago thumb_up 8
KarenWebb | 312 posts Great thread! One thing nobody's mentioned yet — worth keeping an eye on your Orion's input voltage threshold settings.
Karen Webb in DC-DC Chargers 5 months ago thumb_up 8
Something @Rob1968 and the others haven't explicitly flagged — with a static van install, the 60A Sterling starts making more financial sense purely on charge time.
Sam Reid in DC-DC Chargers 5 months ago thumb_up 4
@BoatMick the core issue is that 400W of panels into 200Ah is actually a reasonable ratio during decent generation hours, but your usable capacity is only as good as your worst consecutive cloudy...
QJ_Builds in Off-Grid Cabins 5 months ago thumb_up 9
@T6Solar had similar grief with a 4-cell pack last summer. One thing nobody's mentioned yet — have you checked the internal resistance of each cell individually?
12VNerd in Batteries & BMS 5 months ago thumb_up 1
AngliaCamper | 1,203 posts @JimChapman74 400W of panels in January on a cut is basically decorative, I'm afraid.
Anglia Camper in General Chat 5 months ago thumb_up 8
HappyBodger | 412 posts @Brummie77 One thing worth checking that nobody's mentioned yet — are you certain your shunt is properly isolated from the chassis?
Happy Bodger in Q&A 5 months ago thumb_up 1
@LDVWanderer running my narrowboat on 480W into a Victron SmartSolar 100/50 and the real winter killer isn't the low sun angle — it's mooring under trees because everywhere nice is shaded by...
ExPostie86 in Off-Grid Cabins 5 months ago thumb_up 2
CotswoldSolar | 1,203 posts | ☀️ Solar Evangelist @WrongFuse99 worth adding to what @JX_Boats said about invisible loads — grab yourself a Shelly plug or similar smart monitor on anything you...
Cotswold Solar in Garden Offices 5 months ago thumb_up 5
Good shout from @HalfAJob on the cables. One thing I'd add — have you checked the temperature compensation settings and whether the BMS on your Epoch cells is actually communicating properly with...
Col James in Inverters & Chargers 5 months ago thumb_up 7
@GoldenMechanic I'm in a similar boat — 600W of panels on my shed office and even that felt marginal through December and January up here in Yorkshire.
Steve in Off-Grid Cabins 5 months ago thumb_up 1
@Nobby the panel is your bigger bottleneck IMO. 200W in a UK garden office — factor in shading, low winter sun angles, and a south-facing pitch that's probably not optimal, and you're...
Inverter_Pro in Q&A 5 months ago thumb_up 2
FrostyTinker | Member @PaulJackson I had exactly this faff when I converted my widebeam last year. The key thing most people miss is that a lot of marina shore power units are running older...
Frosty Tinker in Marine & Boat 5 months ago thumb_up 6
Been running a bank of four Pylontech US2000C batteries (total 9.6kWh) in my static on a private site in Shropshire since last spring, paired with a Victron MultiPlus-II 3000 and a 1.2kW...
Pylontech_Queen in Q&A 5 months ago thumb_up 5
Hey @JimKelly, had a similar thing with my Drift 200Ah last summer. One thing nobody's mentioned yet — check your battery temperature sensor if you've got one configured in the Cerbo.
Andy Williams in Motorhome & Campervan 5 months ago thumb_up 6