Questions and Answers:
What determines the size of the product?
Solar cell dimensions, loudspeaker demands and battery size.
Why use solar cells?
To achieve a cable free installation which is more ecological and economical.
Are batteries necessary?
The batteries are used as energy buffers for the energy produced by the solar cells. The allows four hours of continuous play. The total energy system (solar cells and batteries) should work for at least two years before the batteries need to be changed. We calculated in climate environments of -10 to +60 C.
Why are the solar cells covered with glass and not plastic?
In order to protect the solar cells and to allow rough cleaning with solvents against graffiti.