Alternator Upgrade for Hybrid Robot

Driving "Roberto the Robot" on low and or almost dead batteries does not make for a very fun experience. In order to correct this problem, I decided to install an alternator on the top deck plate. Therefore, when the 6.5hp engine was running the batteries would charge and the robot would operate as usual. The alternator I used is a 120 amp Deutz Letrika alternator from Surplus Center.

https://www.surpluscenter.com/Engines/Engine-Accessories/Alternators/12-VDC-120-AMP-DEUTZ-LETRIKA-11204137-ALTERNATOR-28-1883.axd 

Below are pictures of the setup. If you have any questions please leave a comment below or email them to me at henry@hwrrobotics.com

Images: 
back view of alternator
Pulley View
6.5 horsepower Predator Engine
Side View of Roberto in the Garage
Another Side View