Balcony solar & small-scale renewables — who has actually done it?

OP
Plug-in balcony solar has exploded in Europe (Germany has registered hundreds of thousands of "Balkonkraftwerke") and kits are getting cheaper everywhere. I'd love real-world reports from this community: • What did you install (panels, wattage, micro-inverter)? • What did it cost, and what's it actually generating? • Rental-friendly tricks — how did you mount it without drilling? Also open to solar ovens, water heating, and pedal power. Small is beautiful — let's compare notes.