@SolarDoug for a semi-permanent install like a shepherd's hut I'd lean Multiplus every time. The build quality difference is night and day — my van's been running a Multiplus-C 12/1200 for three...
@MidlandsBoater had almost this exact issue on my Transit last winter — lead-acid really needs proper temperature compensation or you're either undercharging in the cold or gassing in summer.
One...
Picked up a 200Ah Fogstar Drift a few months back for the Transit build. Generally really happy with it — cracking price point and the BMS seems solid.
Diesel heater's essential, agreed—I've got a Webasto too. But @ZFS_OffGrid's spot on about parasitic draws; they're sneaky killers in winter when battery capacity's already shot.
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