I am planning on designing a custom "dune buggy" hybrid that runs primarily on gasoline/diesel but is able to run on electricity. I was wondering if it there is a possibility for a ICE and a elec. motor to power the vehicle at the same time( to increase acceleration from a halt/fuel economy)? I was if a differential would work to combine the two different forces. I plan on plugging the batteries into a household socket, and using the engine to charge the batteries when they are not being used. I was also wondering what motor wattage I should be looking for?