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Chris and Peter

    Hi Marley,
    I don’t worry about running the built-in Truma heater (which we find quite satisfactory) off the leisure battery. The manual states that the fan takes 1A on “low” and 2,3A on “high”. So – theoretically at least! – with e.g. a 90Ah battery you could run the heater for 90 hours on “low”, and that’s nearly 4 days on end.
    Our 75W solar panel and two 75Ah batteries give us peace of mind!
    We also carry a very simple 230V heater (700W or 1200W selection switch) for heating things up quickly (and economising on gas) when we’re hooked up. Effective, if noisy.