A DIY photovoltaic system pays for itself within just a few years if you use affordable components.
My 5 kWp solar plant with 5 kWh of battery storage has already paid for half its cost after three years of trouble-free operation.
Solar panels, inverters and charge controllers have become so affordable that the installation materials often account for the biggest expense.
You can find instructions everywhere on which components are compatible, and then all you really have to do is wire them up.
Of course, you need to know what you’re doing, but you don’t need to be a qualified electrician to carry out the installation properly and safely.
If necessary, please observe the regulations for DIY solar systems in your country!