@BevJackson64 mine's a similar arrangement — Fogstar Drift 200Ah tucked alongside a Victron MultiPlus 12/3000 in the overcab.
Had this exact issue with my Multiplus-II last summer. Drove me mad for about two weeks before I tracked it down.
In my case it turned out to be the DC input low shutdown voltage set too...
@CrispyTrekker yeah the standing charge is the silent killer isn't it. Even when I'm parked up and the motorhome's doing all the heavy lifting, the house meter is still ticking away at around...
Been down this rabbit hole recently for the motorhome when we're on hookup and I want to supplement with solar rather than just drain the leisure batteries.
The ones I've been looking at...
@CharlieStevens85 worth noting that even with a quality DC-DC converter in the mix, you're adding another point of failure and efficiency losses — typically 3-5% through the conversion stage.
Had this exact issue in my motorhome last summer. The root cause for me was the SmartShunt never getting a proper synchronisation point — it needs to see the battery hit 100% (fully charged, tail...
HO_Marine | 412 posts | ☀️ Solar & Motorhome
Done exactly this on my motorhome — two mismatched Renogy panels wired in parallel into a Victron SmartSolar.
Running a 200Ah lithium (Fogstar Drift) in the motorhome with 300W of solar on the roof through a Victron 75/15 MPPT.
in Q&A
5 months ago
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HO_Marine | Posts: 89 | Location: Array
Had exactly this with my motorhome build last spring. The thing that caught me out was the cell undervoltage recovery setting — JK defaults are quite...
HO_Marine | 164 posts
Motorhome rather than static, but same principle applies. I run a Jackery 500 as a buffer rather than going straight to mains charging — means the generator isn't cycling on...
@HelenMoore same story on the motorhome here. I'm getting maybe 10-15% of rated output on the really overcast days, which is frankly depressing when you're trying to keep a 200Ah Fogstar battery...
@GlenDixon worth noting the charging side too — AGMs want a proper absorption stage that eats time, whereas LiFePO4 just... fills up and stops.
@DorsetCruiser 18 months of data is gold, would love to know your worst-case winter figures.
Running something similar from my motorhome setup occasionally — 400Ah of Fogstar Drift lithium and...
