Due to safety issues, and the modifications necessary, it's not possible to convert a Q gas model into an electric model, or vice versa.
It's important to remember that each Weber model undergoes a round of testing in a very specific design and configuration, and only after the testing is a model given approval for use and sale.
Once modifications are made to a unit, we can't be sure that it's going to be safe to use, and with this in mind, we can't recommend altering any of our grills from their original, factory intended design.