How to tell if generating or using GRID power when PVSolar is installed

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United Kingdom
Joined: 11 Jan 2011

Well My eleccy meter has an LED that flashes when power is being drawn off grid and goes steady red when i am feeding power onto grid.


i wanted to know which way round the power was going?


so i devised many a circuit that would count pulses etc, then i remembered i had a current cost development board so had a little play with a std cheap light dependant resistor and a 100K potentiometer and low and behold i could get it to output to the current cost.


shows 500watts when feeding grid and 0 when drawing.



pachube feed here (needs to update for a while before it will show me feeding grid as its getting dark and wife's cooking)


Hardware Info