25/01/2026
Someone recently asked these few questions about solar panels;
1. What are they used for?
2. Can they supply light?
First, solar panels, also known as photovoltaic cells are electric power sources and its a vital component in solar generators. They basically convert light energy (rays from the sun) into electric energy (DC/AC). For simplicity, the rudiments of this conversion will not be discussed here.
Now, let's back pedal a little. Remember, I mentioned "solar generators" & "DC/AC".
Solar generators produce useful electric power from sunlight. Its can also operate as a stand-alone unit since its source is not from the grid. This electric power can either be DC or AC that is, direct current or alternating current. Basically, solar panels produce DC current which can be used to operate DC appliances e.g. DC pumps, fans, lamps etc. Also, It can be used for typical AC appliances but via an inverter which converts the DC current into AC current. The dc current produced by the panels can also be backed up in batteries for later use.
Now, back to the first question. What are solar panels use for?
- they are used to produce electric power which can either be backed up in batteries or used to power DC appliances.
Can they supply light?
- yes, they can but this can only be harnessed via certain electrical devices. (See post on charge controllers)
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