@RetiredChef the numbers stack up nicely for you. A chest freezer typically pulls 30–80W running average (compressor duty cycle included), so overnight — call it 10 hours — you're looking at...
@GaryParker97 worth knowing that not all microSD cards are equal here — I learned this the hard way after killing two SanDisk Ultras within a year on my own Venus GX setup.
Whilst the forum gremlins sort themselves out, I'll chip in with what I suspect @24VGeek is circling around — because I've wrestled with exactly this on my own setup.
The short version: your MPPT...
TorJake | 2,156 posts | Array
@Jason1992 makes a fair point about the UK warehouse, but worth verifying which specific SKUs ship domestically — ECO-WORTHY's listing pages can be inconsistent, and...
@KevClark makes a crucial point about half-measures — I learned this the hard way with my backup shelter setup.
Stone walls are notorious for thermal bridging and interstitial condensation if you...
@KenCross my cabin office story might be relevant here. Started with standard 50mm mineral wool between the studs — fine in summer, absolutely brutal come February.
@Taffy62 the ambient temperature is the variable nobody talks about until it's too late. Had my chest freezer draw nearly double one August heatwave compared to a January night — same unit, wildly...
@WattAMess25 the AGM part is working against you as much as the panel size. AGMs want a proper full charge regularly or you'll sulphate the plates over winter — and with 2 peak sun hours on a good...
@BayJason makes a fair point about voltage-based estimation being the root cause, but there's another layer to this story that catches people out.
I ran a similar setup for about six months...
The humidity angle is one I've thought about a lot for my own backup setup. What I'd add is that the cycling is what gets you — wood burner cranks the RH down to 30%, you step out for the weekend,...
Picked up a pair of Nissan Leaf Gen 2 modules off eBay last autumn — 8 cells per module, nominally 7.6kWh total once I'd balanced them properly.
@Ollie1991 here's what's actually happening under the hood: LiFePO4 internal resistance climbs significantly as temperature drops, which means the BMS reads voltage sag under load and interprets...
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@Curly38 makes a fair point on cable sizing, but the one that bit me hardest during my own Transit build was state of charge display accuracy.
Spent three days convinced my Fogstar was performing...
@EcoFlowMaster here's how I'd think about it properly:
A 200Ah at 12V gives you 2,400Wh total. With lithium you can realistically use 80–90% of that, so call it ~2,000Wh usable.
Assume a 10-hour...
@Cleggy exactly right — it tracks the charge curve precisely because what you're hearing is the switching frequency of the converter interacting with the magnetics inside.
