Hi, thanks for the hints and tips,, at the moment its going to be 1 x 2750 watt element, the pot is only 15 ltrs full to the brim so wont be doing forty pint brews, probably going to stick to 20 pints,, because its quite small i dont want to run the risk of it boiling over. 2750 watts is within the 13 amp supply and the controller will handle 3800 watts.It has two sockets just because its one i had lying around. If AG is as good as it sounds then maybe i'll get a bigger one made up.