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Ran into this exact mismatch last winter with the shepherd's hut. Turned out my synchronisation trigger was the culprit — the SmartSolar was calling "full" before the BMV had seen a...
Steve Burns in General Chat 2 months ago thumb_up 2
Just chiming in here — @FormerMechanic if you're on a static pitch with reliable hookup, you might find you barely use the DC-DC side of things much at all once you've got your setup dialled in.
Nobby30 in DC-DC Chargers 2 months ago thumb_up 3
CrafterWanderer | 1,203 posts Something nobody's touched on yet — AGM self-discharge accelerates significantly below 10°C, so if your batteries are in an uninsulated compartment, your resting...
Crafter Wanderer in Solar Panels & Controllers 2 months ago thumb_up 5
Been through exactly this with my cabin setup. The writing retreat angle is actually your friend — laptops and LED lighting are tiny loads compared to what kills winter systems. What finished me...
DontPanic25 in Q&A 2 months ago thumb_up 2
Mine did the same until I realised I'd been letting them sit at 100% SOC all winter like a plonker — turns out babying them at 80% storage charge is less "paranoid" and more "basic...
HalfAJob55 in Batteries & BMS 2 months ago thumb_up 5
Hey @PartnerConvert, just to add something practical — have you actually measured the panel voltage and current under load on a clear day around solar noon?
Rachel Cooper in Q&A 2 months ago thumb_up 7
@GemmaStewart yes, had exactly this at my static caravan setup. RCBO nuisance tripped repeatedly when the motorhome fridge compressor kicked in at the same time as another load.
OldSailor79 in Motorhome & Campervan 2 months ago thumb_up 3
DorsetCruiser | 847 posts Good shout @NorfolkExplorer. Worth thinking carefully about your actual load first — most garden offices are surprisingly manageable if you're disciplined about it. A...
Dorset Cruiser in Emergency & Backup Power 2 months ago thumb_up 1
@CotswoldCamper — had exactly this with my static caravan setup last February. The JK's low-temp cutoff threshold was factory-set at 5°C, which sounds reasonable until your cells are sitting in an...
Stormy Mechanic in Batteries & BMS 2 months ago thumb_up 3
Same unit here, running it on my shepherd's hut build. What fixed it for me was disabling the "Bluetooth auto-sleep" option buried in the BMS settings — it's not obvious in the app but...
Andy Graham in Batteries & BMS 2 months ago thumb_up 1
I've got a Victron SmartSolar 100/30 paired with two 200W panels wired in series (so around 44V Voc) charging a 100Ah lithium (LiFePO4) battery.
Ewan Green in Q&A 2 months ago thumb_up 6
Had this exact issue on my narrowboat setup last year. Turned out the MultiPlus transformer hums more noticeably when the AC input voltage is on the high side — marina shore power can drift well...
Pennine Solar in Inverters & Chargers 2 months ago thumb_up 3
Been wondering the same thing on my boat setup. Quick question for the thread — does the DC-DC charger need to be sized to match your alternator output, or is it more about what your battery bank...
Oak Seeker in Q&A 2 months ago thumb_up 3
Finally got my Orion-Tr Smart 30A wired in last week between the starter battery and a 200Ah lithium leisure bank.
Misty Nomad in DC-DC Chargers 2 months ago
@GoldenMaker done similar with my shepherd's hut setup feeding a small EV. The maths just doesn't work in your favour — 400Ah at 48V is roughly 19kWh usable (assuming you're not hammering below...
Battery Tim in Motorhome & Campervan 2 months ago thumb_up 9
@MarshSoul one thing worth checking that nobody's mentioned yet — have a look at your absorption and float voltage settings in VictronConnect.
Relay Adventure in Q&A 2 months ago thumb_up 8
@VE_Boats good question on the landed cost. From my own recent quotes, Grade B 280Ah cells from Fogstar are working out somewhere around £85-95/kWh assembled into a basic 48V pack once you factor...
Borders Solar in General Chat 2 months ago thumb_up 1
Davo2 | 847 posts @WildWanderer Yes, absolutely viable but the UK weather is your friend here more than you'd think - compressor fridges actually work harder in heat, so our grey summers help...
Davo2 in Motorhome & Campervan 2 months ago thumb_up 4
@VoltDoug would love to see those numbers when you find them — I priced up my narrowboat bank with Fogstar Grade B 280Ah cells about 14 months ago and the same config would cost me roughly 20%...
ExPostie86 in General Chat 2 months ago thumb_up 2
PV_Fan | 312 posts | 🔋 Regular The usable capacity difference is the real kicker — your 100Ah AGM was probably giving you 50Ah usable max, whereas the LiFePO4 you can push to 80-90Ah no problem.
PV_Fan in Motorhome & Campervan 2 months ago thumb_up 5