Scour the EVDL.
1.) 60mph won't happen with a 48v motor and a car chassis. If you want that speed, you'll need to be more ambitious.
2.) 156AH in batteries won't equal 156AH in motor performance. Lead acid batteries (the only type you are likely to use) suffer horribly from something called the Peukert Effect. The faster you draw energy, the less energy becomes available.
3.) Motors and controllers aren't 100% efficient. At most, an 80% efficient driveline can only turn 156AH into 125AH of work. Combine this with point 2 and things get depressing.
4.) Solar cells don't ouput in fixed voltages. Their voltages generally vary according to the strength of the sun. Solar cars use MPPT to convert these varying voltages to the system or battery voltage.
5.) At most, you'll be able to shoehorn ~300Wh with the most advanced consumer terrestrial solar cells. It will probably cost ~$2k for low end cells and ~$4-6k for high end models. If your car runs 200Wh/mi, an 8 hour charge time will net 12 miles. In reality it'll be less as 300Wh assumes perfect conditions.
Out of long range, cheap, and reliable, pick two. I don't mean to sound overly negative, but the dreaming stage is termed that for a reason. Many of my wild ideas of been knocked down by reality. An EV is doable, but you have to have a healthy understanding of what you're likely to get in return for your effort.
- LostCause