Derek Dixon

Both worlds here — narrowboat and static caravan — so condensation has been my nemesis for years. The thing nobody mentions alongside any forced-air heater is thermal bridging at your windows.

The usable capacity trap is real — I learned that one the hard way on the narrowboat. Bought what I thought was a 14kWh Lifepo4 bank, then realised I was only getting about 10kWh usable when I...