Had something eerily similar happen with my motorhome setup last summer. The battery would charge fine, sit at a healthy voltage, but the moment I put any meaningful load on it — nothing.
@LazyWarden yes, classic summer frustration this one! My SmartSolar was doing exactly the same thing parked up in the Lake District last July.
What caught me out was the temperature compensation...
@RetiredChef ha, the British summer struggle is real!
Done exactly this in my motorhome with a Fogstar Drift 200Ah — ran a small Subcold 35L chest freezer through the night and it was absolutely...
Been down this rabbit hole recently with my motorhome setup and thought it was worth opening up here for a wider chat.
I'm running a Victron Multiplus-II alongside an older Renogy inverter-charger...
@DODGuy the Victron MPPT calculator has always been a bit hit-and-miss with newer controllers — I noticed the same thing when I was spec'ing out my motorhome build last spring.
Been running a small home server setup in my motorhome for about eight months now — Proxmox with a couple of VMs, Home Assistant doing all the clever stuff, pulling around 18–22W on average.
@MoorLee — this was exactly my situation last winter touring Scotland. Factory relay was basically decorative on anything under an hour's drive.
Swapped it out for a Victron Orion-Tr Smart DC-DC...
Been mulling this one over for my motorhome build actually, so feels timely to share.
I've got a Victron Smart Battery Protect (the 65A version) sitting in my parts box waiting to be wired in, and...
@PennineDweller the winter narrowboat struggle is real — I went through something similar optimising my motorhome setup and the lessons translate directly.
The Trent & Mersey corridor can be...
Stacey | 📍 Array | ⚡ Solar & Motorhome
Something nobody's mentioned yet — I made the mistake of going 24V on my motorhome build first, then had to rip it all out and start again when my loads...
Been through this exact headache on my motorhome build. The bit that caught me out was the Multiplus's charge profile — even on the trickle setting it'll push a voltage that's fine for the LFP but...
Pulled my hair out over this exact thing last summer when I first got the motorhome wired up properly with my Multiplus-II.
@Macca97 I had the same head-scratching moment with my motorhome setup — Victron BMV against a Fogstar Drift BMS telling me completely different stories.
What sorted it for me was doing a proper...
The battery bank thing's crucial, yeah, but I'd add something from actually living with this in the motorhome — timing is everything.
in Q&A
4 months ago
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I've had the opposite journey to most — started with the SmartShunt in the motorhome, then added a BMV-712 when I got serious about understanding what was actually happening.
Here's the thing: the...
