WOW! It was awesome 15 minutes of gameplay :O
At first when I saw ALL THE CONTROLS I was a little frustrated and thought, that the game would be TOO NERDY, but it wasn't. (I think you should open up the control one by one along the tutorial explains them)
Also I think you should add some recoil or penalty for turning on the generator and panels for too long, for now it doesn't make any sense to turn them off
Overall it was very interesting to plan the charging routine and control the rover. NICE WORK!