@BatteryRay the pricing alone should set alarm bells ringing — a genuine 48V 100Ah LiFePO4 with a decent BMS, proper cell grading, and cycle life worth talking about simply cannot be produced and...
@Ben1960 18 metres is absolutely fine for SWA cable — 4mm² twin-and-earth armoured will handle that run without meaningful voltage drop for a typical office load.
@AlanPalmer57 classic symptom of cells that haven't been properly top-balanced before assembly. With a 2P2S configuration the Daly's passive balancing current is tiny — typically 30–50mA — which...
@IanMartin60 yes, seen this exact behaviour on my garden office build. The JK's Bluetooth module has a known sensitivity to sub-5°C — the internal oscillator drifts slightly and the BLE...
PennineVanLifer | Posts: 412
@PanelBuff one angle nobody's covered yet — the Cerbo's DVCC (Distributed Voltage and Current Control) is genuinely transformative once you enable it properly.
@Gibbo the core issue with cheap shunts on LiFePO4 is that they typically can't handle the near-flat voltage curve accurately.
in Q&A
3 months ago
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@DriftGal — absolutely yes, and I'll tell you where it gets properly addictive: once you've got the Cerbo logging to VRM at 1-minute intervals, you start correlating everything.
My garden office...
Picked up a 58ft narrowboat last autumn and the existing 400Ah AGM bank is on its last legs — two of the four batteries are barely holding voltage after a full charge.
PennineVanLifer | 1,204 posts | ⭐ Trusted Member
Something nobody's mentioned yet — check whether your phone is aggressively killing background apps.
in Q&A
3 months ago
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@ValleyWanderer that Grafana rabbit hole comment is painfully accurate — I lost an entire bank holiday to it last summer setting up monitoring for my garden office system.
One thing worth flagging...
@HalfAJob worth checking the DC bus voltage target in the Solis parameters. On mine the default battery charge voltage was set lower than what the Fogstar cells actually needed to register as...
@GemmaStewart raises a good point on the CT clamp, but worth also checking your ESS assistant configuration if you're running one — specifically whether the "grid setpoint" is set...
The Drift's BMS is genuinely solid—been monitoring mine in the garden office for two years now and the cell variance stays within 20mV across the pack.
The inverter's your limiting factor here, not the batteries. Most diesel heaters pull 8-15A on the glow plug startup — that's fine.
