Plug-in solar and batteries are behind the meter and can reduce bills without worrying about the utilities net metering nonsense. Hopefully we'll soon have plug and play thin and light products and people can get creative, cover multiple surfaces, knock off most of the bill.
Behind the meter yes but the meter does still need to be a smart meter and programmed correctly otherwise you could get billed for any extra power that is exported to the grid.
I hope this comes to more states soon. It's typically only 800 watts max but once the initial device is in it keeps chipping away at your power bills, and in most areas that could save around a dollar a day for decades in exchange for a relatively small upfront purchase price.
I want one on my balcony pretty much just to offset A/C usage in the summer.