Been poking around on this, but nothing too deep.
Seems to be that the game breaker at the moment is not the solar panels but the storage if you want to harvest the daily sun for night time use. And I get the feeling, given the rate of development that this hurdle might be solved in the near future. Luckily this desire for a better and more efficient battery is being "driven" by the car industry at the moment.
I know nothing, will admit to nothing, but Doom is still a good movie