I don't know for sure....BUT:
This vehicle was originally owned by a California electric utility.
It had a lot of extra little wires on it the are NOT part of the Solectria conversion. The owner told me that they were sensor wires for testing the batteries, tracking power, etc.
Also, the battery box had a number of ventilation ports on it that looked like they were thermal management.
Which leads me to believe that the vehicle originally had a molten salt battery pack.
Molten salt battery - Wikipedia, the free encyclopedia
In the Wikipedia entry, scroll down to "ZEBRA".
The THINK Electric has this type of batteries as one of the options. (
Click here for info on their web page. )
I believe that this was also the type of battery that Ford was using in their EV Minivans during the "EV1 time period" of the CARB mandate.
I think that the "standard" Solectrias ran on group 27 lead-acid gel batteries.