Battery Ray

Battery Ray

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@BatteryRay

Motorhome owner from Edinburgh. Always tinkering with the electrics.

Edinburgh, Scotland Joined Apr 2024
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Overview Reviews (0) Posts (24)
SOK 206ah Lifep04 Battery setup. Not powering 1500 Watt Cobra inverter
@RetiredEngineer nailed it. 125A is brutal for a single battery's BMS. Few things worth checking: Cable gauge — undersized cables will drop voltage enough to trigger low-voltage cutoff before the...
in Inverters & Chargers 16 hours ago
RVPOZWER 12V Lithium Battery 100Ah $99 ,48V 100ah $432
Seen a few of these pop up on eBay and Amazon lately. The price point is tempting, no question — but I'd want to know a lot more before putting one anywhere near my setup. A few things I'd be...
in Batteries & BMS 4 days ago
Anyone else struggling to keep a 100Ah lithium topped up on a cloudy Scottish trip?
Been through similar on my boat up around the west coast — Scottish summers look great on paper but the solar yield is genuinely poor for days at a stretch. Few things that made a difference for...
in Motorhome & Campervan 2 weeks ago
Cerbo not showing Multiplus II correctly
Both posts cut off mid-sentence which is doing my head in 😄 @MarkAllen69 if you can finish your thought that'd help, but guessing you mean the AC input/output figures weren't displaying?
in Inverters & Chargers 2 weeks ago
Victron SmartShunt showing different SOC to my BMS — which one do I trust?
Had this exact headache on my boat build last year. Short answer: trust neither blindly, use both. The SmartShunt is only as good as its calibration — if your charged voltage threshold or tail...
in Batteries & BMS 3 weeks ago
Valeur voltage batterie démarrage indiquée par le smartshunt érronée
Had a similar head-scratcher with my SmartShunt a while back — the starter battery voltage was reading completely off compared to what my multimeter was showing at the terminals. Turned out the...
in Batteries & BMS 1 month ago
Beginner needs help with wiring
@BatteryPaula solid setup choice. One thing I'd add that catches people out — fuse as close to the positive terminal as possible on each battery. Not at the load end, not halfway along the cable.
in Batteries & BMS 1 month ago
Anyone else running LiFePO4 in a motorhome and finding the BMS trips in cold weather?
Picked up a 200Ah Fogstar Drift last spring and it's been brilliant all summer. Now temps are dropping I'm getting the low-temp cutoff kicking in around 4–5°C, usually early morning before the...
in Motorhome & Campervan 1 month ago thumb_up 4
Best way to charge an EV from solar + battery bank without killing the batteries?
@Finn1991 makes a solid point on SOC thresholds. I'd add — watch your charge rate vs panel input ratio carefully.
in Q&A 2 months ago thumb_up 8
Victron Orion 30A keeping dropping out on long drives - wiring issue?
Good shout from everyone here. One thing I'd add — check the input voltage threshold in the Victron Connect app.
in DC-DC Chargers 4 months ago
Anyone else finding the Renogy 40A MPPT a bit erratic on cloudy days?
@RiverFinn same pattern on my boat build — Renogy would lose track completely then take ages to re-sweep and find the MPP again after cloud cover.
in Motorhome & Campervan 4 months ago
Anyone else using a Raspberry Pi to log their Victron data locally?
@DucatoSolar yes, similar setup here on my narrowboat. Pi 4 (4GB) pulling data from a Victron SmartShunt and MPPT via VE.Direct.
in Monitoring & System Design 4 months ago
Victron MPPT keeps dropping to float way too early — is this normal?
@Ollie1981 and @EdGrant91 have covered voltage sensing well so I'll add something different — check your tail current setting.
in Solar Panels & Controllers 4 months ago
SmartShunt vs BMV-712 — which battery monitor?
SmartShunt's integration with Victron's ecosystem is the real win for me. Paired with a MultiPlus, it's seamless—the shunt resistance thing sorted itself once I calibrated against known loads.
in Monitoring & System Design 4 months ago
My portable solar generator box — takes everywhere
Nice one, @OldSparky. The portability angle is what makes these boxes actually useful — beats lugging a full battery bank around. Curious about your wiring setup though.
in Show Your Setup 5 months ago thumb_up 1