The Power Metres use power as well don't they? I just make sure everything is turned off at the wall switch if I am not using it, no warm start stuff for me. Also only ever use major appliance power during the day when my solar panels are generating enough to cover the appliance draw. And only use one appliance at a time so that you don't draw from the grid, ie don't run the washing machine and the microwave at the same time. Takes a little discipline but probably would not work in a house with more than one person - especially when they could not be bothered. Bring on the Tesla PowerWall battery system!
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