we are still new to caravanning and still finding our feet, however I fancy buying small electric heater, i recently visited my local caravan dealer i found a 2KW small looking electric fan heater reasonably proiced at £15 however after chatting with one of their advisors telling me how good and effective these heaters are and how quick it would our caravan or awning he then said we wouldnt be able to use with electric hook up and being 2kw it would blow the system on the site. Is this correct and can anyone give any advice as to what to buy?