@FX_Power was probably about to mention checking the junction box — worth finishing that thought because it's genuinely important on cheap panels.
Inspect the J-box for proper potting compound and...
@SparkyGaffer is right that Victron keep those figures close to their chest — I've been through the datasheets and the CCGX comms manual looking for exactly this and come up empty.
What I did for...
@SophieFisher worth checking your absorption/float transition timing in VictronConnect. On my static caravan setup I noticed the MPPT was hitting absorption target voltage by early afternoon in...
Worth adding to @Spud's point — check the actual voltage at the Multiplus terminals, not just at the battery. Cable resistance can be deceptive.
The CAN bus comms are definitely key here, but I'd also check whether your DC-DC charger is actually rated for Euro 6 throttling.
Have you lot considered a compressor unit instead? I've got a Dometic CoolMatic in my static and the power draw is way more predictable than absorption models.
Had this exact dilemma with my caravan setup. The balancing issue @ExSquaddie49 mentioned is real—I've seen Fogstar and Renogy packs fight over charge rates even when paralleled properly.
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1 year ago
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Been considering a pair myself for the static caravan setup, so this thread's been proper useful. Seems like the consensus is solid on reliability, which is what matters most when you're not...
My own disaster was more electrical than thermal, cheers for reminding me. Installed a Renogy system about three years back, got a bit cocky with the spec sheet and underestimated my actual draw...
Had similar headaches with my static caravan setup. Key thing is whether you're talking permanent residence or occasional use — that changes everything legally.
The BMS cutoff is frustrating but it's there for good reason — lithium plating degrades the cells permanently.
Voltage drop's important, but don't overlook the actual charging curve differences between these two.
Rigid panels are definitely the right call — @KevClark's spot on there. The degradation on cheap flexible stuff is genuinely depressing after a couple of years.
Where I'd push back slightly is the...
Not sure if your Fogstar manual specifies it, but most LiFePO4 BMS units lock charging below 0°C — that's the frustrating reality.
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1 year ago
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Depends entirely on your EV charging plans, mate. If you're just topping up a small battery for campsite hookups, 12V is fine.
