You still pay service fees to maintain a grid connection. Not to mention that many people with these setups contribute excess generation back to the grid or allow their batteries to discharged by the grid during demand spikes.

A lot of those service fees were designed to scale with the amount of electricity used. If you've got a net metered bill chances are you haven't really been paying much for service fees.

I don't know anyone who bothers discharging their home batteries to the grid. The rates they get wouldn't cover the cost of the wear and tear to their batteries.

I am part of a plan that discharges my batteries to the grid. I don't initiate this happening, it is based on a pull from the grid upto 60 times per year when demand is high. Full disclosure that I received a rebate on my batteries for allowing this.

Also, I just checked my bills and my service fees are a flat amount independent of how much electricity I pull from the grid.