Can anyone suggest a cheap but accurate Electric Meter to be used in a caravan. Reason :- I have 5 vans on a site in mid wales and have recently received the electric bills for the winter quarter, 4 of the 5 bills range between ÂŁ30 and ÂŁ45 and feels about right considering usage. Van 5 has come in at ÂŁ129 and was used about the same, 99% sure nothing was switched on between mid November and beginning of March. The site agrees it looks a bit high and want to charge ÂŁ60 to fit a tandem meter to compare readings, if the meters tally I'm out ÂŁ60 with nothing to show for it. However, if I get my own for ÂŁ20 - ÂŁ30 and the meters tally I'm only out half the amount and have a meter I can use again. The site will accept this approach but the meter must be fitted inside the van and be a known/acceptable make. The dead tests I have done so far haven't shown up any faults which made suspect an iffy meter, I will be spending some time at the weekend with clamp meter to see what that shows up. Any other pointers would be greatly appreciated. Thanks in advance. Steve