I'm going to Aube wall switch or Nightscaping's self contained unit with the Aube switch & receptacles for all of my timers. I think the intermattic is only good for <300 watts, plus, the contacts break easily for the battery terminal and the watch batteries are a nuisance/call back issue and drain easily when power is out. They are also ten bucks to replace (2). Also, they look unprofessional in the upside-down position, and they alienate the consumer from programming or installing their own batteries (humans cannot program that thing in the upside down position). Added benefit of the Nightscaping unit, the customer can plug in their holiday lights, too, if you leave them an open receptacle. I believe the wall switch model I am using is rated 2400 watts. Thanks, James, for the tip.