My 2013 Gem has a 20 cell Chevy Bolt pack.
My voltage is around 86 volts. So the car runs and performes much better then a stock 72 volt gem.
I had the privilege of having a 99 volt Chevy Spark 24cell Battery in this same car and it was awesome. The range was not as great as this 20 cell pack but the performance was great I loved it. So the Spark pack was a hot rod but it was just under what I wanted as far as range. When I dropped in the 20 cell Bolt pack the range was Awesome but I was kinda of missing the performance of the Spark. So this is where I can have the best of both worlds. Adding a 4 extra cells to my existing pack. It started out with splitting a 8 cell pack I bought.
Once the terminal was on I attached the wires for the BMS, because the copper was so hard to solder to I ended up drilling into the contacts and used ring terminals with a sheet metal screw holding the rings to the terminals
LOL : I have to remake a 2 battery cables. And re-run the Chargery Charger cable. So 3 wires and the BMS leads and then install David’s voltage Spoof and bolt it down. And I should be shooting along. Crap that reminds me I wanted to do a timed hill climb o well 2 late
PS - my four cells will not fix in that back battery compartment, it might fit but it would be really really tight. I am going to have to put a board across the battery compartment and set the pack on the board.
I ended up putting the pack “sideways” in the Center tray the location that just in front of rear tray. It’s over 16inch wide. A few inches wider then the rear tray.
Just put 20+ hilly miles on the car and it’s Awesome. Came back with 3.8v when normaly be 3.7 to 3.6 or lower. It’s got way more punch I would say a 20-30% power boost. It’s not a night and day power boost but it does the trick on our steepest hill here we got a 6 MPH boost and that’s exactley what I needed. Just enough to not be in people’s way so I’m super happy. Big thank you to Dave who helped me when I was stuck
Should be a 75 mile battery easy.
As Polaris gets $12k for similar upgrade, I believe you should get $5k to duplicate this for someone. To the best of my knowledge you are the only one who has access to 15kwh gem batteries, and required experience.
3 other Bolt/gems I know of, but no 15kwh available anywhere else in the country.
