Or does the glass remove most or all of the energy contained in sunlight?

Just wondered if I power one of those portable solar chargers if I can leave it working during the day next to a window.
Thanks for the answers.

I just wasn’t sure which part of the spectrum is used for solar energy. I read somewhere that modern windows have a layer that cuts out certain parts of the light spectrum so that curtains and paper etc don’t fade as much when behind windows (remember faded yellow paper?)

Best answer:

Answer by TigerStar
It works fine through windows. You lose a little energy to the glass, but it’s not a significant amount and solar panels still work fine in indoor sunlight.

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