# Would it be efficient to run a solar panel with laser?

Would it be efficient to run a solar panel with laser? I know this question is unsual as we are using electricity powered laser to run a solar panel. Actually i am paricipating in the Google Science Fair so i need a answer and my idea is not this for the fair. Thanks and hoping for a good answer. If yes how much watts of laser would i need to run a 10w solar panel (I know we need multiple laser as it focuses only on one point).

(It would be good if someone is giving a mathematical notion but they may write that in words also so that i can understand better)

Thanks hoping for a good and polite answer.

• It depends on the efficiency of the panel (usually 10-15%) and how attuned the panel is to the wavelength of the laser. Since panels tend to be dark purple or blue, I'm thinking a green or red laser would absorb best. But the short answer is no. You'd be better off using the laser to boil water and run a steam engine.... – Jiminion Apr 20 '15 at 12:55
• You can't use a laser to produce more power than it takes to run the laser. Unless you have a 100% efficient generator, you also can't use it to produce the same amount of power needed to run the laser. So no matter what, any power you generate is going to be less than or equal to the power you use to generate it. Effectively, you have a power drain that does nothing – Jim Apr 20 '15 at 12:58
• @ACuriousJim I know that its poorly efficient but thats not my idea my idea is something else but for that to happen i need a baseline information so this question was just for the info – Bhavesh Apr 21 '15 at 2:35