EtcHow do solar panels generate electricity to charge mobile phones

When sunlight hits the solar cells, it excites electrons, generating direct current (DC) electricity. This DC electricity is then used to charge a battery or directly power a device, like a phone. [pdf]
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What kind of plug should be used to charge photovoltaic panels

Take the female MC4 plug (negative) of the modules and plug them into an MC4 combiner. You can use a 2-in-1 MC4 combiner for two modules, or bigger ones (4-in-1 combiner, etc.) for more modules. [pdf]
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