"SUNNIVA 920 W Balcony Power Station BIFAZIAL Full Black Complete Socket TSUN 800 W Inverter, PV Solar System, 2 x 460 W Glass/Glass Solar Modules, Includes 5 m Cable, Bluetooth WiFi, Complete Set"
Literally the first result that comes back for "balcony solar panel kit". 239 Euros with 4.2 star rating and > 200 purchase in the last month.
I can't vouch for this brand or kit but that's what comes up on top on amazon.de. Looks like some Chinese manufacturer, as you would expect. Plenty of pretty positive reviews in German with a few deployment photos. There are indeed a lot of solar panel related products on Amazon. It seems to be a popular product category.
You might get different results from outside Germany.
I’ve searched but the deluge of crappy systems that aren’t what you mean is overwhelming results.