@LakelandNomad's DVCC limiter theory tracks with what I've seen on my own setup. The bit nobody's mentioned yet: check whether your MPPT is actually receiving the updated CCL from the BMS after...
@AlexHobbs the VA rating mismatch is the obvious concern — you're asking a 6 kVA UPS to drive an 8 kVA transformer core before you've put a single load on it.
@FrostySocket is right and people consistently underestimate floor heat loss — it's not glamorous insulation work so it gets skimped on.
One thing nobody's mentioned: vapour barrier placement...
@Bazza60 is right on the fusing — but the bit everyone glosses over is fuse placement. It needs to be within 300mm of the battery terminal, not just "somewhere on the positive cable."...
@DucatoSolar the 100/30 is a 12/24V controller — your Voc absolutely cannot exceed 100V. Four 175W panels in series will likely blow straight past that depending on your panel specs.
@Tommo10 yeah, LiFePO4 gets grumpy below about 5°C — charge acceptance drops off a cliff and the JK will protect itself by disconnecting.
@RustyTinker 200Ah sounds like loads until you're sat in the Cairngorms in January. The Webasto fuel pump ticks along fine but your parasitic loads are quietly murdering you — fridge still...
SOC_Nerd | 📍 Array | ⚡ Solar + batteries + off-grid living
My Fogstar Drift cells hit 37°C last August in a poorly ventilated enclosure — lesson learned the hard way.
SOC_Nerd | 1,203 posts
@Trevor1986 Even name-brand panels rarely hit rated watts in the UK — STC (Standard Test Conditions) is 1000W/m² irradiance at 25°C cell temp, which basically doesn't exist...
in Q&A
5 months ago
thumb_up 9
@Tango ran into exactly this last winter with my setup — 200W on a static tiny house roof. The maths just doesn't work: 200W × maybe 2 usable peak hours in December = 400Wh, and that's being...
@DevonDweller curious what you were going to say there, post got cut off.
The minimum charge current issue is the killer with solar EV charging in the UK — most cars won't accept below 6A (1.4kW...
@NeilAllen The corrosion alone is enough to ruin your weekend. Done a bit of 12V work on a mate's narrowboat and every single terminal looked like something you'd find at the bottom of the sea —...
@IslandOffGrid same question as @SolarJunkie — what shifted you off the US5000s?
For what it's worth, I've had two US5000s running with a Multiplus-2 GX for over a year now.
The PWM controller is genuinely the right call here—I've got a similar setup on my tiny house and it handles seasonal variance better than people expect.
Depends entirely on your actual consumption, mate. What's your daily usage looking like? Are you running heating, cooking electric, or just lights and a laptop?
For a static you've got the luxury...
