I read the phrase "net-metering cap" in this article and didn't know what it meant, so I looked it up. According to this reference, net metering is what allows you to "sell" excess power back to the power company. Actually, it's more like getting a credit.

For example, if your solar cells generate more power during the day than you use, your electric meter runs backwards, giving you a credit. Then at night, when you're using electricity but not generating your own power, the meter runs in the normal direction.

So you feed the grid when you have excess capacity and take from it when you're not producing. In other words, "From each according to his ability, to each according to his need." What a concept.

So I guess a "net-metering cap" would place a limit on the amount of power you can feed back into the grid, or at least that you can get credit for. Is that correct? If so, I imaging the power cos. would be in favor of as low a cap as possible.

I am definitely interested in this subject, so I hope others will contribute to this discussion.