I'm designing a military force for my world, and I'm trying to build an electric tank, I have all of the other mechanisms, I just don't have a power source. I'm looking for a zero emissions electric power source. I already have a power storage mechanism drive train etc. What I'm looking for is not a battery, but rather some type of zero emission electric generator turbine or similar device.I would like a power source that at least if it cannot be zero emissions,at least don't make it have carbon emissions.
A zero emission condition limit a lot what can be done. A solution can be an array of batteries with some way to partially recharge them while moving (a dynamo and/or some kind of wind turbine) and a mechanism to recover energy when braking.
Maybe some deployable solar panels for when the condition allow them.