Solarpunk technology

It's only fine because the panels do not do much of anything.

When large swaths of the population become even partially self-sufficient, it's an enormous issue for the electric grid. Again, not an issue over an occasional few hundred watts, but when whole neighborhoods cover their roofs in solar panels the following happens:

• These (comparatively rich) people stop contributing to maintaining the grid. Half of electricity costs are distribution costs, so unless you have no net metering and a separate distribution line in your bill the rich are being subsidized by the poor to install solar capacity at home. Of course changing the billing system fixes that, but it also makes solar much less financially interesting and really pisses off people who already paid for solar and now won't be having a positive ROI for an additional decade.
• The panels are not remotely operable so their aggregate power generation sometimes causes enormous stress on the rest of the grid, forcing old nuclear/gas/coal PP to spin up and down much more quickly and frequently than they were designed for.
• Locally the voltage fluctuations may be very large. Nominal where I live is 230 V, but it's not unheard of for rich neighborhoods to be pushing 250 V on very sunny days. Then the inverters shut down automatically, but it's always whoever happens to have the most sensitive inverter who ends up not being paid on sunny days.

Anyways apartment solar is not really the issue here, it's the people with 10+ panels. But there are good reasons for solar to be heavily regulated.