Type approval shouldn't be required. It's just a change of fuel type and I'm currently trying to get a definitive answer from DVLA that the Taxation Class would be changed to suit and hence the reduced (i.e. currently £0) VED rate. They did imply that was the case, but I'm trying to get something more concrete....Have you researched the other issues mentioned such as type approval, insurance, impact on ride and handling?
What were your findings?
Not asked about insurance, but I don't see why that should be an issue and it's not the biggest concern.
There should be little impact on ride, handling etc. As a rough guide, the batteries will likely weigh about the same as the original ICE. So there'll be the additional weight of the electric motor(s), but that should be less than 200Kgs, so not a huge increase overall. I doubt you'd notice that in an SL.
Biggest concern in fact is that this would be a very hard car to convert. So much integration of electronic control systems, so I really think it is not practical. Certainly not as a one off. But as I said, I've not given up the idea of an electric conversion, so I'll just sell the SL. Annoyingly I cannot yet post an ad to the Classified section.