After we gave some thought to a terrace roof, it is now installed. Aluminum with glass (8mm), 495 cm x 400 cm as a cabrio version (you can slide individual glass panels and avoid heat buildup in summer) and 6 LEDs for 8,500 euros. Point foundations were also included. The under awning was measured and will be installed next year. It is electric and will cost about 3,500€ more.
Sounds very OK. We recently ordered from Schmidt Überdachungen and will pay 10,200€ for 5x3.5m with laminated safety glass, under-roof awning, and 6 LEDs. However, without the cabrio ;) Topic screed: From Saturday afternoon to Friday afternoon, just under 1000 kWh have passed through the electricity meter. Besides the Hotboy (since Monday), there is also a 500W frost guard in the garden shed (probably only relevant for the first few days) and a Kroll TK30 construction dryer with 0.63kW (running almost continuously, only at night the bucket fills up). We can roughly estimate both together at 100 kWh, which would leave 900 kWh for the Hotboy since Monday. For that, I found the 14-15 degrees in the house rather not so warm. On the other hand, 130 sqm of screed had to be heated first plus two concrete ceilings with 20cm each.