That was until 2023. In 2024 the regulations were changed and kow it can’t be stopped. Neither stopped by your landlord, by the city, nor the local power company. Just buy it for around 400€ and install it (no Deye inverter though). You’ll get 2 or 4 solar panels, an inverter and a cable with schuko plug to connect inverter to your flats power network.

You plug it into your power plug and as soon as the sun glares, your little power net in your flat gets cheap power. If you adapt your behavior accordingly - start laundry, dryer, ironing at noon - you can save some bucks.

I have no quick start guide in englisch. May be you google around a bit. If you live in an older building, you should read about old power cables as well and start with low wattage- 600w inverter. It’s really that easy now 😋