I was assuming that each phase units consumed is calculated separately but I suspect they are all added together so the idea breaks down. So nothing to be gained here. ---------- Forwarded message ---------- From: Justin Richards Date: 17 January 2013 16:53 Subject: [OT]: Renewable Energy Feed In Tariff To: "Microcontroller discussion list - Public." I am certain this has been considered by many before me as I am often amazed at how quickly people find ways to exploit everything and anything. A power bill indicates that power is consumed at 22.62 cents per unit and a feed in Tariff of 40.0 cents per unit. As the premises for this power bill has a 3 phase connection, then it seems conceivable that a variable speed drive type of device could draw power from one phase at 22.62 cents and supply power to another phase at 40.0 cents making a profit of 17 cents per unit. This feed in Tariff is only for a limited time and as such may make it cost prohibitive to build and install such a device and you would not want to cause a noticeable spike in power used and power supplied so you could only do this on a small scale. Apart from most likely being illegal and dishonest is the idea academically plausible. Justin --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .