I guess the batteries are just extra weight - I'm not looking for an exact math answer, I could do the same thing. Or use a different gen, etc. to increase HP. I'm just interested in this concept of using the generator to move the vehicle along till real power is contributed by a battery bank.
As you increase horsepower, you increase weight. Refer back to your original question, I listed some useful answers that apply here as well. The basic principle you are thining of is exactly the principle of a modern Diesel electric locomotive short of the battery bank. As a concept- it is very workable. 3 Phase power has an advantage to it of space and weight savings for the horsepower versus single phase.
