Now it is regulated here that you can claim subsidies from the EU for solar systems. And these in turn require that only specially listed and certified companies are commissioned.

Alright, I thought as much!
And this is where the problem is from.

If individuals were allowed to install it themselves without inviting those company's installers....I'm not sure there would be those charges.

We don't have such in Nigeria.

Perhaps, the installers in the EU pay huge to be certified...I guess