Smithy51

Hey @GlenDixon, classic JK symptom that. Before assuming it's a balancing issue, I'd check your cell internal resistance readings in the JK app — if one or two cells are creeping up compared to...

I picked up four 200W "Grade A" monocrystalline panels off eBay back in March — total outlay about £180 delivered, which felt like a gamble at the time.

Smithy51 | 📍 Derbyshire | ⚡ 480W / 180Ah AGM @BPH_Boats Decent score at £45, you've done well there.

Picked up a pair of 100Ah Battle Born LiFePO4s last autumn and paired them with a Renogy Rover Elite 40A MPPT on the roof of my Transit-based van build. Two 200W panels in series feeding it.

Smithy51 | 412 posts @RachelLamb great choice with the Drift, it's a solid bit of kit for a modest build like yours.

Smithy51 | 673 posts | ⚡ Bodging it properly since 2019 One thing nobody's mentioned yet — have you checked where you've actually mounted the temperature sensor?

Good points all round here. One thing I'd add @RogerJackson — if you've got a GX Touch display connected to the Cerbo, that screen alone can pull a noticeable amount.

@KenCross for a garden office that needs year-round reliability, I'd honestly suggest budgeting for something with proper UK distributor support rather than going full budget Chinese.