@SolarTrevor had exactly this with my setup at the cabin last year. Worth checking your absorption voltage threshold in VictronConnect — mine was set too low (leftover from a AGM profile someone...
@TID_Electric haha "not exploding" — setting the bar high there 😄
Had a similar budget rack battery in my static caravan setup before I switched to Fogstar Drift cells.
Had this exact issue last summer with my cabin setup. The MPPT will cut absorption short if it reckons the battery is already close to full — it's called adaptive absorption and it's on by...
@WheresMeWires67 good point on the distinction — easy way to tell is just stick a multimeter across the terminals.
Been mulling over upgrading the setup at my cabin/static for a while now. Currently running a basic off-grid system — 400W of Renogy panels, a Victron SmartSolar MPPT, and a 200Ah Fogstar lithium.
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2 months ago
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Had the same thing hit me last autumn with my cabin setup. What sorted it for me was wrapping the battery in a bit of closed-cell foam insulation — dead cheap from B&Q — and chucking a small...
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SaltyMaker | 891 posts | 🏕️ Off-Grid Cabin
Same rabbit hole here. Ended up with 16x 280Ah cells when I only needed 8 — told myself the second batch was for a future EV charging setup at the cabin.
Finally pulled the trigger on a Fogstar Drift 200Ah to replace the two old 110Ah AGMs I'd been limping along with. Night and day honestly.
SaltyMaker | 612 posts | Array
Running almost the same combo at my static but with a 60A DC-DC instead — honestly the 40A is fine for a single 200Ah, no need to upsize unless you're adding more...
@SolarGaz ha, classic bag mix-up 😄
Running Victron across multiple setups here — cabin, static van, even dabbling with EV charging.
@Compo and @Spider12 make fair points on the chemistry side, but my real-world gripe with cheap PWM units is the temperature compensation — or lack of it.
@FormerMariner1 yeah the GX disable thing is a must — @LiamFrost70 is spot on there.
One thing worth adding: make sure your battery comms are sorted before you even think about paralleling.
The Cerbo's definitely the right choice for this — you're not overdoing it. VE.can gets properly busy once you start stacking devices, so that extra processing headroom pays for itself.
Worth...
Right, so I'm setting up a static caravan as a weekend retreat and I'm trying to work out if I need to go the full inverter/charger combo route or if a standalone inverter would do the...
Yeah, @RustyTinker's hit the nail on it there. Beautiful to look at but absolutely brutal for output.
