The most famous building roof types are gable, hip, lean-to, flat, butterfly, curved, dome, mansard, and concrete roofs. See the pictures below for clarity.

In a tropical climate like Nigeria, "with about 7 months of heavy rains during the rainy season", according to the World Bank Group; a flat roof system (180 degrees) is not a good option. The cost of roof installation increases daily and the gradual switch to renewable energy is gaining ground.

Most residential homes and other buildings are using rooftops for solar panel installation for two major reasons. This is to take advantage of all solar angles and also to reduce robbery.

In using energy gotten from solar panels, you may have noticed that the rate at which your solar batteries get fully charged reduces over time.  One thing to consider in solar panel installations is that there is a need to make provisions on how to clean the surfaces of these panels, once every year.

Continue reading here... https://mydesigngist.com/roof-type-for-solar-installation/

Nice thread

Yeah continue please..... Need to clean the surfaces so the charging rate doesn't decrease

Lina555:
Thanks for this info! I'm going to buy solar panels next month. I wonder whether I'll need to clean solar panels. If yes, how often will I need to do this?

As I stated in the post. You will have to discuss with your solar installer for specifics on maintenance due to varying product type. You can use this link to reach out to this solar inverter specialist. https://www.facebook.com/chibuzo.emeti
Thank you.