tag:blogger.com,1999:blog-8814961153679656011.post4102856937616117037..comments2023-08-24T06:21:49.251-07:00Comments on Kevin X Brown: Calculating energy usage is harder than it seemsKevin X Brownhttp://www.blogger.com/profile/01420461034123257268noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-8814961153679656011.post-59867156625397316102009-01-28T04:23:00.000-08:002009-01-28T04:23:00.000-08:00An overly complex solution might be to (presumably...An overly complex solution might be to (presumably under the control of some piece of computing equipment) periodically flip on something of known load. If the reading from the meter showing your flow to/from the grid goes up then you are importing and if it goes down you are exporting.Andrewhttps://www.blogger.com/profile/17438579408622914818noreply@blogger.comtag:blogger.com,1999:blog-8814961153679656011.post-90781170512689485432009-01-09T01:33:00.000-08:002009-01-09T01:33:00.000-08:00Sounds to me like you need to have a word with an ...Sounds to me like you need to have a word with an electrical clever git. Maybe time to talk to Current Cost themselves or Andy SC to see if there's a non-invasive way of measuring the direction of current?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8814961153679656011.post-82433192150432137272009-01-08T06:48:00.000-08:002009-01-08T06:48:00.000-08:00Hi @shawdm Thanks for the idea! Took me a while to...Hi @shawdm Thanks for the idea! Took me a while to think about that - it makes sense that the "solar slip road" traffic joins the "mains motorway", and measuring it just afterwards would give the total traffic going on in.<BR/><BR/>Unfortunately though, the current will find it's way to Earth in the quickest way possible - so if an appliance is on in my house, it will go through it - if not, it will find the nearest neighbour's appliance to go through. So the "mains motorway traffic" just flips direction, and the meter, wherever it is along the motorway, will be none the wiser.Kevin X Brownhttps://www.blogger.com/profile/01420461034123257268noreply@blogger.comtag:blogger.com,1999:blog-8814961153679656011.post-76473089370734679552009-01-06T23:30:00.000-08:002009-01-06T23:30:00.000-08:00Could you not put the second sensor around the wir...Could you not put the second sensor around the wire at the point after they have been combined into one circuit. I assume at that point it can only ever be flowing in to your house. If that number is smaller than that being generated by the panels, then you'd know you were exporting.<BR/><BR/>There's probably a reason you didn't do that. :-)shawdmhttps://www.blogger.com/profile/04533750826513996386noreply@blogger.com