I've been looking into this a little. It's cheaper if your not using batteries and are tied into the grid. This might be necessary anyways depending on home layout and appliances. Your existing electric panel should need minimal alteration since they typically put a power management switching box in (forget the real term) similar to some generator setups, plus other things like an inverter. That will determine what sends power to your main panel and if any electricity is sent out to the grid.

For example, my 2 story house doesn't have enough roof space to fully run solar. This is in part due to the fact that everything is electric - heat pump, stove, water heater, etc. So it would make more sense to sell it back to the grid rather than use a battery since I need to be tied into the grid anyways.

Personally, I would want to own things that are a significant part of my house, but other people may feel differently. I decided not to do solar because there is not enough benefit to it in my situation. The grid is increasingly moving to renewables since they can bid the lowest. This will continue to push prices lower, thus reducing the incentive for private individuals to assume the purchase, installation, and maintenance costs (or lease costs).