Battery Tim

Battery Tim

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@BatteryTim

Converted a Self-built campervan after retirement. Best decision ever.

Oxfordshire, England Joined Dec 2023
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Overview Reviews (0) Posts (37)
[BUG / possible regression] ET112 watt value freezes when Cerbo S GX UI enters idle state — Venus OS
@BaySoul check your Venus OS version first. There was a period where the GX display driver and the Modbus polling weren't properly decoupled — display going idle could throttle background...
in Monitoring & System Design 3 days ago
Connecting Vatrer batteries via BLE to Cerbo GX - Success!
Been meaning to post about this for a while. Got my Vatrer 200Ah LiFePO4 talking to the Cerbo GX in the shepherd's hut last month using pretty much the same approach — ESP32 acting as a BLE...
in Monitoring & System Design 3 weeks ago
battery cable & fuse question -> Epoch V2-T 12v 460 ah
What @BlownFuse and @SunnyFisher said, but nobody's mentioned cable length matching yet. Running parallel batteries? Both cables from battery to busbar need to be identical length.
in Q&A 3 weeks ago
DESS not charging when sell price is 0
@HelenThompson finish your sentence, for crying out loud. @DevonDweller you were doing the same thing two seconds later, so. Anyway — DESS treating a £0 or negative sell price as "don't...
in Batteries & BMS 1 month ago
Centaur on shore power to start battery while starting - ok?
@SprinterProject the Centaur is a DC-DC charger, not a shore power unit — @PanelGraham already covered that. But the actual question buried in your post: do not charge a starter battery while...
in DC-DC Chargers 1 month ago
Growatt SPF 6000 ES + Pylontech US2000c battery BMS comm
@GazAllen yeah the pinout thing catches everyone out. Pylontech's own docs have errors in some versions — don't trust the manual, use the wiring guide from their support portal specifically for...
in Batteries & BMS 1 month ago
AC load on phoenix 12 | 500 not working - linux appimage
@ExSquaddie49 already touched on VictronConnect but worth being specific — the AppImage needs to be set executable first (chmod +x) and you'll likely need the correct USB-VE.Direct or MK3...
in Solar Panels & Controllers 1 month ago
How to safely rebalance banks?
Been meaning to post about this for a while. Running two separate 12V LiFePO4 banks in the shepherd's hut — a pair of Fogstar Drift 100Ah cells I built up myself and an older Renogy 200Ah drop-in...
in Batteries & BMS 1 month ago
Multiplus Efficiency Loss on Heat Up
BatteryTim | 1,203 posts | Array @WildTinker finish your sentence mate, we're all guessing here. @CliveCrane probably jumping to conclusions as usual. That said — Multiplus 12/3000 thermal...
in Inverters & Chargers 2 months ago
PV dimming causes grid usage while delivering a bit back is cheaper
@WendyFisher61 classic DESS nonsense. Your feed-in excess threshold is probably set too low, so the system decides it's cheaper to nick a tiny bit from grid rather than discharge further while...
in Inverters & Chargers 2 months ago
Swapped to lithium on my narrowboat last summer – worth every penny or am I imagining it?
Not a narrowboat bloke myself — shepherd's hut and a motorhome — but swapped to lithium on both and the difference is night and day.
in Marine & Boat 2 months ago
Anyone else using a Raspberry Pi to log their battery data long-term?
Been doing this in the shepherd's hut for about three years. Few things nobody mentions: SD cards will die eventually. Run your OS from a USB SSD if you're serious about long-term logging.
in Monitoring & System Design 3 months ago
Insulating a stone bothy - where do I even start?
@DefenderAdventure "heat battery" is a stretch tbh. A heat battery implies you're storing useful energy for later. Cold-soaked stone in January is just... cold stone.
in Off-Grid Cabins 3 months ago
2P2S 4 x 12v 300ah Lithium Configuration for 24v with balancers. Heeeeeeeelp
@Nessa68 280Ah cells aren't 300Ah cells though, worth being precise about that. On the actual question — parallel first, then series is correct for 2P2S, yes.
in Batteries & BMS 3 months ago
Narrowboat solar setup – is 400W enough for a liveaboard?
@OldSailor is right but underselling it — flat panels on a narrowboat roof are a nightmare. Zero tilt adjustment, trees on both towpaths, bridges blocking sun half the morning.
in Marine & Boat 3 months ago