Well, the existing range in Germany lists the Eco models at 1600 watts, but SEBO already have a 1200 watt model in the form of the "manual cord version" Professional D series. Thus, it's a no-brainer - SEBO could easily just release 1200 watt D series models on the market in the same way Miele have done with their Ecoline series.
The uprights already have a low power output - 1300 watts for the X4, 1150 watts for the X1.1, 1300 watts for the Felix.
The 1500 watt K1 Cappuccino/Eco hasn't been a great success in the UK. Sales were so low that SEBO decided to pull it, though some independent sellers claim to have the K1 Eco in stock.
When you consider that most of SEBO's commercial line up range from 1000 to 1300 watts, the company are already one step ahead compared to other brands where low output is concerned.