I understand completely how a grid-tied system works. What is the significance of the differential rates you quoted then? Are you saying that Kwhr you provide during the day are credited the SAME RATE as what you use?
I know the net spin is backwards. But the utility has a record of both what you provide in excess during the day --- AND ---- what you consume at night. Are the rates the same?
the significance is toddsterpatriot asked what the difference was between what the power company billed and what the power company paid when they bought your energy.
look at it this way. day 1, my meter starts out at 0. I make 50 kwh during the day. but I only consume 20. the rest goes out my meter and I have a 30 kwh credit. that night i use another 25. that leave me with a net balance of 5 kwh. I have no bill but a 5 kwh credit. they do not bill me until my meter gets back to zero and I start going into the positve. Right now, I have over 15,000 khw in my favor. i have to use all of that up befor I would get billed at their going rate. if i elect to, i can sell that 15,000 kwh back to them at their lower purchase rate. my meter then goes back to zero and the cycle starts over. or I could sell 10,000 kwh back and maintain a 5,000 kwh credit and start building over again with a safety net.