As for the types of solar panel:

This article will help you have a better understanding solaer panels and also solar in the Nigerian and of course West African market which includes Ghana, Benin, Togo, Ivory Coast, Niger, Mali, etc.
Solar panels are also referred to as photovoltaic panels. They are referred to as photovoltaic because of their abilities to trap sunlight and convert it to electrical energy.  They are classified into three major types, namely:

• Monocrystalline solar panels,

• Polycrystalline solar panels, and

• Thin film (amorphous) solar panels.

Read full article here: https://wavetra.com/blogs/news/all-you-need-to-know-about-solar-panels-in-the-nigerian-market
 
You can learn more about it in this video: