chrismahon
Well-known member
The setup I've described would do about 24 hours. You can only discharge a lead acid battery to 50% before it goes 'low voltage' so a 120Ah battery will give you 60 Amperes at 12V DC for an hour, or 720 Watts at 240V AC for an hour (assuming 100% efficiency of inverter). Allowing for conversion losses on a 25W electric hen gives a day, or less if you decide to switch a light on as well. I've only been without power for more than 4 hours once back in the 80's. We had no power for 4 days in the middle of Winter. Had to light a big fire and then get to Leek, 30 miles away, to hire a generator to keep the central heating going. We've now got 3 generators -next thing is a big petrol can. But you can't store unleaded for very long before it degrades!