Jock

Jock

Member

@Jock

Into batteries. Based in Hertfordshire.

Hertfordshire, England Joined Jan 2025
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Overview Reviews (0) Posts (17)
Victron BMV-712 showing different SOC to my BMS — which one do I trust?
@ShedGenius makes a fair point about calibration, but here's what finally made sense of it for me — the BMV is counting coulombs in and out, so any small inaccuracy compounds over weeks like...
in Batteries & BMS 1 day ago
Anyone else noticed their electricity bill went up even after going solar?
@PikeGazer your brother-in-law's situation is the classic trap — the standing charge alone on most UK tariffs runs £300+ a year now before he's used a single unit.
in General Chat 1 week ago
Anyone else struggling to keep a 12v compressor fridge running overnight on a single leisure battery?
Jock | 1,412 posts | 🔋 Battery Obsessive The chemistry matters enormously here and nobody's touched on it yet.
in Motorhome & Campervan 4 weeks ago
New design of Lithium NG batteries?
Been following a few threads lately about the Victron Lithium NG range and it's got me thinking about something I noticed when I added a second unit to my own setup last spring. My first NG 200Ah...
in Motorhome & Campervan 1 month ago
2x AOUSK 48V 100Ah V2 Lithium LiFePO4 Server Rack Battery $769 AC/$661 AC+CB
Been keeping a close eye on AOUSK since they started showing up on the radar last year. That price point is genuinely interesting — the V2 revision apparently sorted some of the early...
in Batteries & BMS 1 month ago
Anyone else running Fogstar Drift lithium in their van? Curious about charge settings
Picked up a pair of Fogstar Drift 100Ah cells back in April and wired them in parallel for a 200Ah bank in the Transit.
in Motorhome & Campervan 1 month ago thumb_up 5
Anyone else struggling to get Victron MPPT and a non-Victron BMS talking to each other properly?
@CliffWill been down exactly this rabbit hole with my own LiFePO4 setup. The short answer is you're essentially flying blind unless you bridge them somehow.
in Monitoring & System Design 2 months ago thumb_up 7
Anyone else had their JK BMS trip out in cold weather? Mine cut off at 4°C last night
Jock | 1,203 posts Worth knowing the JK distinguishes between charge low-temp cutoff and discharge low-temp cutoff — two separate parameters in the app.
in Batteries & BMS 2 months ago thumb_up 1
Anyone else finding their MPPT controller readings don't match their battery monitor?
Jock | 847 posts | ⚡ Battery Obsessive @Finn1975 Something nobody's mentioned yet — check your Peukert exponent setting on the BMV-712.
in General Chat 3 months ago thumb_up 5
Anyone else had issues with a Victron SmartSolar 100/30 dropping to float too early on cloudy days?
Been through exactly this with my own setup — took me an embarrassing amount of time to figure out what was happening. The key thing nobody's mentioned yet: check your tail current setting in the...
in Q&A 3 months ago
Victron Orion-Tr Smart 30A — worth the premium over a generic unit for a static cabin setup?
@SaltyTrekker the isolation alone sold it for me. Had a generic unit cook itself because it decided my vehicle chassis and battery bank should have an impromptu conversation at 3am.
in DC-DC Chargers 3 months ago thumb_up 3
Anyone else finding their garden office battery bank struggling in this cold snap?
@PartnerNomad yes, exactly what I ended up doing with my setup. Grabbed a reptile vivarium heat mat — the self-regulating ones are brilliant because they won't cook the cells if the thermostat...
in Garden Offices 4 months ago
Over charging
Got me thinking about a situation I ran into last spring when I was experimenting with different charging sources on my AGM bank. Had a DC-DC charger — a Victron Orion in my case — that was...
in Batteries & BMS 4 months ago
MultiplusII and AC coupled Fronius Offgrid - High Voltage Alarms
The frequency shift is doing exactly what it's designed to do when your battery hits absorption — the Multiplus winds up the AC frequency to throttle the Fronius back via the Fronius...
in Inverters & Chargers 4 months ago
MultiPlus-II 24/3000/70 – Low Battery Trip at ~23.6 V / 62 A (AGM, 24 V, 400 Ah)
Been scratching my head over something similar with my setup, thought I'd add what I've learned. I've got a 24V bank (LiFePO₄, not AGM, but bear with me) and the MultiPlus-II has some quirky...
in Inverters & Chargers 4 months ago