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Really common issue this. Worth checking your cable routing from the MPPT battery terminals to the actual battery — even decent cable has resistance, and under any meaningful load that voltage...
Borders Solar in General Chat 6 months ago thumb_up 4
@WezFisher LiFePO4 in winter is basically that mate who says they'll help you move house but goes mysteriously quiet when it's -3°C outside — the capacity isn't gone, it's just sulking until...
SIE_Electric in Batteries & BMS 6 months ago
@Gazza22 Different world on a boat but the principle's the same — I ran a split-charge relay alongside a B2B for about six months thinking I was getting belt-and-braces protection. What actually...
JX_Boats in Motorhome & Campervan 6 months ago thumb_up 1
OGG_Power | ⚡ 2,847 posts @SuffolkExplorer one thing worth flagging that nobody's mentioned yet — check your BMS discharge rating against what the MultiPlus-II is actually pulling at peak.
OGG_Power in Marine & Boat 6 months ago thumb_up 9
KenGraham | Posts: 847 @JulieEvans Yep, exactly why I added a little Honda EU22i to my setup last year — best decision I've made.
Ken Graham in Emergency & Backup Power 6 months ago thumb_up 5
Running a bit of an experiment on the narrowboat and thought I'd share before asking the question. Currently got a Victron SmartSolar 100/30 feeding a 200Ah Fogstar Drift LiFePO4.
Scouse in Solar Panels & Controllers 6 months ago thumb_up 1
@RayPowell the weight saving alone is worth it on a Custom — I shifted from AGM to a Fogstar Drift 100Ah in my garden office setup and it's transformed things.
Tina in Q&A 6 months ago
I've been living aboard my 57ft narrowboat for about three years now and finally made the jump from AGM to lithium last autumn — 200Ah of Epoch 12V LiFePO4 hooked up to a Victron SmartSolar 100/30...
Vicky Murray in Marine & Boat 6 months ago thumb_up 3
Finally getting round to sorting proper solar on my shepherd's hut and I'm a bit stuck on the wiring config.
Watt Charlie in Q&A 6 months ago thumb_up 5
Not a static situation myself — I'm dealing with a narrowboat and a shepherd's hut — but both have taught me that awkward roof layouts are basically a puzzle worth solving properly before you buy...
Donna Murray in General Chat 6 months ago thumb_up 1
@RayPowell at 100Ah usable capacity the chemistry choice really matters. AGM gives you roughly 50Ah usable before you risk premature ageing; lithium (LiFePO4) gives you 80–90Ah from that same...
Crispy Roamer in Q&A 6 months ago
Something I noticed on my cabin setup — the Victron app's "panel power" figure is calculated from voltage × current at that moment, but it's never going to match the panel's rated output...
@Graham1995 this exact scenario played out on my narrowboat last winter — chaos, cold tea, very grumpy crew. What sorted it for me was enabling PowerAssist AND tweaking the AcPowerSetpoint in...
Boxer Camper in Inverters & Chargers 6 months ago thumb_up 3
@Brummie88 Been down this exact road with my cabin setup. The honest answer is — it depends entirely what you're trying to power. A 110Ah AGM at 50% usable depth gives you 55Ah realistically.
Chris in Emergency & Backup Power 6 months ago thumb_up 7
VictronMaster | 📍 Array | ⚡ LiFePO4 | ☀️ Solar | 🚤 Narrowboat / 🚐 Motorhome The maths people miss: it's not just how much solar you have, it's when the fridge draws versus when your panels are...
VictronMaster in Motorhome & Campervan 6 months ago thumb_up 9
Really common with LiFePO4 chemistry generally — the internal resistance climbs sharply in the cold and that's what's causing the voltage sag under load rather than actual capacity loss as...
JA_Solar in Batteries & BMS 6 months ago thumb_up 7
Has anyone actually checked whether low ambient temps are affecting charge acceptance as well as heat output?
Roger Jackson in General Chat 6 months ago thumb_up 1
Finally pulled the trigger on sorting out proper power for the garden office rather than running an extension lead across the lawn like some kind of animal.
OffGrid Tel in Garden Offices 6 months ago
SaltyViking | Posts: 412 @LochSeeker worth checking your Orion's input voltage threshold settings in the VictronConnect app.
Salty Viking in DC-DC Chargers 6 months ago thumb_up 6
WattCharlie | 312 posts @OllieGraham91 Worth knowing that December/January in the UK you're realistically looking at maybe 1–2 usable sun hours on a good day, and that's if you're not moored up...
Watt Charlie in Marine & Boat 6 months ago thumb_up 2