Most people who put in solar, expect the power co to essentially provide them with free batteries. They in fact aren't free. So they have a point. No, transformers work both ways just fine, and it's quite rare someone has enough to push more net into the grid even at peak times than they would draw at peak times. No one puts up that many panels (room can be an issue even if money isn't). Even though the power co doesn't currently use batteries, the effect is the same - they still have maintenance costs, have to keep wires up, trees off them, and now with this new source, have to be a lot more agile. Older coal and I'd suppose nuclear plants don't ramp up and down quickly as the sun goes behind a cloud, leading to further waste, or having to use faster responding nat gas turbine plants to handle wildly variable loads. I hate to defend these guys - they are evil, no doubt, always have been while I've had this particular company in my neighborhood - their feed-in tariff has varied from 2c/kwh for electricity you produce while charging you 14c/kwh for electricity they sell you - and they demanded two separate meters, so you'd have had to make 7x the electricity you created (after your own use) to just break even. Jerks. For a little while, law made them kinda fair, but they got that overturned first opportunity (they get the best law money can buy, right?). Entitled to a profit...gheesh. Nice to watch from a distance...a great distance. Popcorn helps.
One advantage to living in the boonies off-grid. The power company is aptly named - they have power to enforce building permits - your stupid local gov delegated that one almost everywhere. No permit required, your PP taxes are nil....heh. So I was able to afford 4 homes, taxed as barns...yeah, the solar cost a lot, as did the batteries, and you have to adapt a bit during the "dark month". But...all in all - I win, they can go and die in a fire. This has little or nothing to do with being green. It's more like I'm Scottish. I don't hate nature, but that's not the motivation. Libre was. Freedom to not have to have a job for monthly bills, and other advantages ruled the decisions. Building my own homes was fun too. And you feel like you've done something net-positive in the world. In the boonies you can get this done before the