solar charging

Hello all, I am a software engineering student albeit I have no experience on drones. I was pondering about my detached house's security and I have come up with an idea. I am thinking of a drone that: Stores energy at daytimes by a solar panel. If that energy is insufficient, generates...

Since I am pretty ignorant when it comes to watts, voltage, electrons etc, I thought I'd turn to the brainiacs who inhabit Phantom Pilots to ask how many watts a solar panel would need to be to charge one P3P battery in the same amount of time the wall charger does? I am thinking of those times...