Stove for the summer kitchen

We have gained this double hob over two years ago to cook on our terrace in summer. The Ellrona 62099 double-induction hob is excellent workmanship, the panels work accurately, the device is easy to clean and it was in the more than two years use has been no failure. Negative We find, however, the induction technology to this unit. While you can super fast coming to a cooking result, but when it comes to temperature keeping, or simmering or keeping warm, the induction technology of this device is overwhelmed because only turn off and turn off the cooking process is, that sauce cooked or not cooked. In addition, the hob consumes power as soon as the plug is in the socket.
For this reason we werwenden the hob only to heat something quickly.