A green army? Is this a joke?
if you introduce hybrid motors or fully electric motors, you are currently relying on the supply of strategic materials from an adversary nation. China.
Where do you go to replenish active service losses? Certainly not to a nation actively working against your interests.
Also, the increase in cost and complexity will actively work to reduce force levels, which are already, apparently, dangerously below requirements.
We need to concentrate on combat effectiveness and maintain an independent, indigenous supply chain.
War is not green. War is red.