I've read some articles over the years about how electrical suppliers were required to buy back any excess electricity you happened to have left over after your windmill, or whatever, generated more than you required. I can see the rational thought in this process, but haven't quite figured out the mechanics.
My house has a 200 amp service, which is supplied from a transformer that is attached to a pole. The electricity supplying the transformer is of a substantially higher voltage than my house can use, but the higher voltage is necessary to tranport the amount of electricity to more than one customer. This is the standard procedure, since the higher voltage allows smaller wire to "push" the electricity over further distances. Still the wire size is fairly large compared to all wiring in my house, except for the main feed. To add insult to injury, anything I'd generate for my house would be of the wrong voltage, so I'd have to use a tranformer to convert the voltage to the correct voltage for the grid and tie into the higher voltage cables, which are inaccessible to me as a consumer.
A windmill is an expensive critter to own and operate. Besides the subsstantial cost for construction, the additional wiring, converters and maintenance are well beyond what I'd be able to tackle. On a still day, or during downtime for maintenance, I'd have to be able to use the grid for electricity, so what I have would still be necessary. Otherwise, much of my electrical system would be repetitive and this would be expensive and there's no way I could justify the expense due to the fact I would lose money.
Generators are handy. They can supply everything I need for electricity, but since I've dealt with them before, there's no way I can use one at a cost that's less expensive than what I buy from the electrical supplier. I've done the math, so buying a large generator, making the necessary connection to the grid and selling it back to the supplier would be a huge loss over time.
Solar might be an option, but I don't think I have enough acreage, or money, to justify the expenditure to gamble on the possibility of selling electricity back to the supplier; especially if I consider nothing could be sold at night.
Hydroelectric is out of the question. I have no water source.
So, now to my question: Has anyone ever actually sold electricity back to the supplier?