do you have a spare Arduino you could run 24/7 to manage energy in your home?
Similar in a way to this: http://www.kickstarter.com/projects/acrobotic/the-smart-citizen-kit-crowdsourced-environmental-m?ref=search
Personally: running an electrically powered device to measure electricity use in order to reduce it is a little bit ironic ;-)
I assume your going to have a watchdog running if you want 24/7 365
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