Asking if any hybrid counts and what do I need for proof this is the answer I got back today [quote]
The last sentence of the paragraph answers your question; "A copy of a paid invoice itemizing the cost of the equipment and installation must be furnished; including, if applicable, the type of fuel to which the vehicle has been converted.”
You must also complete form 511CR.
If I can be of further assistance please do not hesitate to contact me.[quote]
So again I'm guess yes! 