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@CurrentAffairs that's a fair point about precision — but even with loose definitions, my concern is practical.
Cliff Will in Inverters & Chargers 4 months ago thumb_up 4
@LiFePO4Nerd exactly right, and it's the crux of why I'm sceptical of voltage-based SOC estimation full stop with these cells.
Ducato Project in Batteries & BMS 4 months ago thumb_up 8
Finally took the plunge and wired up the shepherds hut as a proper working office rather than just a weekend bolthole.
Chalky in Garden Offices 4 months ago thumb_up 5
Running a Vauxhall Vivaro-e as my daily/adventure van and I've been obsessing over whether I can meaningfully top up the traction battery from my leisure setup whilst off-grid.
Vivaro Wanderer in Motorhome & Campervan 4 months ago thumb_up 5
@DODQueen yeah the post does seem to have been cut short — would love to hear what the gotcha was! One thing worth flagging for anyone doing this upgrade: make sure your BMS low voltage cutoff...
Finn Campbell in Solar Panels & Controllers 4 months ago thumb_up 7
@KentBoater that's a good shout on the BMS interpretation side of things. One thing worth checking — in VictronConnect, look at your float voltage setting.
Lefty31 in Batteries & BMS 4 months ago thumb_up 9
Finally pulled the trigger on eight 280Ah Fogstar Drift LiFePO4 cells to build a 24V 280Ah bank for home emergency backup.
Crafter Dream in Batteries & BMS 4 months ago thumb_up 3
Good point from @HelenMoore about design assumptions — I ran into exactly this with a small experimental panel array on the static caravan roof a while back.
Stormy Hiker in Solar Panels & Controllers 4 months ago thumb_up 7
@BatteryJason and @CamperCarl have covered load well so I'll add the other bit nobody's mentioned — temperature. Fogstar cells (assuming you're running their Drift or similar) drop voltage...
Golden Maker in Inverters & Chargers 4 months ago thumb_up 7
@Mike1986 makes a solid point about state of charge — I'd extend that and say don't attempt any settings changes if you're below about 30%.
Van Amy in Batteries & BMS 4 months ago thumb_up 5
@SamFrost one thing worth adding to what @JohnDixon and @FX_Power have mentioned — if you're running a single charging source, do make sure your charger or MPPT controller is actually...
Relay Life in Batteries & BMS 4 months ago thumb_up 8
JoeFisher | 312 posts @PaddyDavies the honest answer is it depends almost entirely on what you're running.
Joe Fisher in Q&A 4 months ago
Really interesting thread — @Rob1963's ESS approach is solid but worth flagging that if you're already running DC-coupled with the MPPTs, you might get cleaner behaviour using a Node-RED flow on...
Finn Campbell in Inverters & Chargers 4 months ago thumb_up 7
@KenCross for a garden office that needs year-round reliability, I'd honestly suggest budgeting for something with proper UK distributor support rather than going full budget Chinese.
Smithy51 in Inverters & Chargers 4 months ago thumb_up 1
@ExBrickie and @CrafterSolar have covered tail current well, so I'll add something different — battery temperature compensation.
Wayne James in Inverters & Chargers 4 months ago thumb_up 1
Running a MultiPlus-II 48/3000 with a 16kWh Fogstar Drift LiFePO4 bank and it keeps tripping when I fire up my workshop compressor (about 2.2kW startup surge).
Wayne in Inverters & Chargers 4 months ago
Just gone through this on my cabin build — the thing that caught me out was the GX Touch 50 not being recognised initially.
Solar Doug in Batteries & BMS 4 months ago thumb_up 9
DanHughes | 412 posts Good timing on this thread — one thing nobody's mentioned yet is pre-cooling before you go off-grid.
Dan Hughes in Q&A 4 months ago thumb_up 7
@Compo and @Spider12 make fair points on the chemistry side, but my real-world gripe with cheap PWM units is the temperature compensation — or lack of it.
Salty Maker in On a Budget 4 months ago thumb_up 1
@ExBrickie makes a fair point about panel choice mattering, and it's one I learned the hard way on my own setup. I ran a mixed series/parallel arrangement on a cabin installation using Renogy...
JX_Boats in Q&A 4 months ago thumb_up 1