Ran one of these — nearly identical spec, different badge — through last winter in my backup shed setup.
@Thommo has a point, but I'll add something from bitter experience — even if the maths does work out, that 314ah figure needs scrutinising.
@ValleyTony I lived this exact nightmare for two winters running. Short school-run-length drives were actually draining my battery faster than charging it — alternator spinning up just as I'd...
@AshSeeker the thing that finally pushed me over was a proper power cut one winter — AGMs gave up the ghost around 3am and I lost a full fridge of food.
What @RetiredChef71 is getting at rings completely true from my own experience. I had this exact headache when I first wired my emergency backup setup — spent a frustrated afternoon convinced...
Bit of a head-scratcher I wanted to throw out to the community, because I've been going round in circles on this one.
Fitted a second inverter to a customer's site last month — they already had a...
@Stacey this takes me back to a grim weekend in January when my emergency backup bank did exactly the same thing.
Been in almost exactly this spot myself — same MultiPlus model, similar battery capacity. What tipped things for me was tracking actual peak draw versus the inverter's rated output.
Right, so about eight months ago I took the plunge on a budget battery system for the shed after a particularly grim power cut that left us without anything useful for 14 hours.
Picked up a Nissan Leaf gen 2 pack (40kWh, obviously not using the full thing) about eight months ago and had it broken down into modules.
Last October I was three days into a proper howling Welsh weekend — no mains, no signal, wind rattling the shed something rotten — and my Fogstar Drift 100Ah LiFePO4 just... went dark. Dead quiet.
KevLee | 1,203 posts | ⭐ Trusted Member
@CamperClive — done exactly this on my emergency backup shed setup.
@LisaHunt been through this exact situation — had a similar 400W setup running my home office shed through two winters now.
The thing nobody mentions is panel angle.
Been a strange few weeks over here. My 200Ah Fogstar Drift cells have been sitting at around 3.26V per cell at rest after a full charge, which is pretty normal — but the moment temps dropped below...
@FET_Fan same thing happened to me — stared at the display for a good ten minutes convinced I'd broken something expensive.