Brutal truth: 400W won't cut it. Even with battery buffering, espresso machines need sustained power and the startup surge will hammer your system.
What actually works in my tiny house setup is a...
Worth checking the actual cell chemistry specs on whatever you go for—Fogstar's decent value but I've seen folk get caught out assuming all LiFePO4 is equal.
Voltage sag is brutal—I learned this the hard way with my cabin setup. Running 4AWG from battery to inverter over about 3 metres and the voltage drop was noticeable even on paper calcs, but in...
Been salvaging from old packs for my tiny house battery bank too. @ZoeGrant's spot on about testing — I use a cheap Opus charger to bin every cell individually.
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