Sounds good - especially being able to go off-grid. Our isn't but I'd like it to be so that when the next great war comes, I won't need to worry about our power grid getting bombed. Also useful in power cuts of any sort really. Plenty of candles for now 🕯️🕯️🕯️

The ‘tool shed’ doesn't even have lighting... But I'm working on it and will wish for a huge mobile battery for Christmas... ;-)))

I think that you can get Solar Powered Christmas lights so you can probably get away without the mobile battery this year. Heating might be a problem though - there's nothing worse than a cold spanner.