Fitted a thermotop C from a Freelander 1, 2 years ago, only use a single battery and not wired in the blower fan, engine starts easy with no glow plugs required after about 20 mins. Then once in I turn the fan on full. I also use it to heat the engine up quicker, so if I jump in, from cold, start with glow plugs, then switch on the thermotop, switch off after about 4-5 miles and the temperature gauge is at normal and a warm cab.