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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 4 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 4 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 4 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 4 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 4 months ago thumb_up 2
@WezFisher same boat here (literally). My Fogstar Drifts did the same thing last winter moored up in Scotland — looked like proper capacity loss but turned out the cells were just cold-soaking...
Loch Dweller in Batteries & BMS 4 months ago thumb_up 1
@OllieThompson73 had exactly this drama last spring fitting out my static caravan build. Missed three restocks before I finally got lucky at half seven on a Tuesday morning — apparently that's the...
Master Solar in General Chat 4 months ago
Doing a weekend/occasional weekender conversion on a Transit Custom. Space is tight so I'm looking at 100Ah as my battery bank — no more.
Ray Powell in Q&A 4 months ago thumb_up 1
DanFisher89 | 47 posts | West Yorkshire Great timing on this thread @SimonKelly - did almost identical after the Boxing Day storms a couple of years back left us without power for 11 hours. One...
Dan Fisher in Emergency & Backup Power 4 months ago thumb_up 4
ShaunHamilton | 312 posts @RoundTuit solid setup to start with, but overnight EV charging is a different beast entirely.
Shaun Hamilton in Off-Grid Cabins 4 months ago thumb_up 3
Good shout from @DODGuy and @Chris1977 on those settings. One thing I'd add — have you looked at the transfer switch settings in VEConfigure?
Rob in Inverters & Chargers 4 months ago thumb_up 3
@KMV_Marine looks like your post got cut off, but I'll hazard a guess you're seeing the controller jump to float before the battery's properly full — classic symptom. Nine times out of ten on...
Kent Boater in Q&A 4 months ago thumb_up 3
DalesOffGrid replied: @Roger1983 the flat voltage curve on LiFePO4 makes your cheap shunt about as useful as a chocolate teapot — current tracking drift is the real killer, so splash out on a...
Dales OffGrid in Q&A 4 months ago
Finally took the plunge and got the garden office properly sorted for power last month. Went with two 200W panels on the roof (south-facing, slight pitch), a Victron SmartSolar 100/30 MPPT, and a...
Moor Roger in Garden Offices 4 months ago thumb_up 1
Ha, glad it's not just me going mad then! 😄 @GoldenBodger please do finish that sentence, we're all hanging here! Just to add a bit more detail to my original post - the dropout seems to happen...
Neil in Q&A 4 months ago thumb_up 9
BreezySkipper | 847 posts @LutonDream congrats on finishing the build! Yeah, the fridge is absolutely the sneaky one that catches people out.
Breezy Skipper in General Chat 4 months ago thumb_up 9
Right, I'll wade in here because this is basically my life on the boat 😄 I charge a Renault Zoe off a Victron Multiplus-II with roughly 10kWh of Fogstar cells behind it, and the honest truth is:...
Kingy in General Chat 4 months ago thumb_up 4
Really solid write-up @EwanMurray, cheers for sharing the breakdown. The Victron SmartSolar is such a sensible choice even on a tight budget — the Bluetooth monitoring alone saves you so much...
Sandy Viking in On a Budget 4 months ago thumb_up 3
@MoorRuss is absolutely right about DNO interpretation — I ran into exactly this with my narrowboat's shore power setup last year.
Marine Ollie in Inverters & Chargers 4 months ago thumb_up 1
@24V_Nerd great project, really interested to see where you went with this. I did something similar on my 26ft bilge keeler a couple of years back — the old shorepower setup was an absolute...
Sam in Marine & Boat 4 months ago thumb_up 9