Don't worry about holes in roof.
With good materials and workers you will be safe for next 10-25 years....
Different thing is about ROI and pros/ cons if you will connect this as micro generator to grid....
Then there will be " nice " contract "...
Also stuff isn't cheap....
Inverter....if hybrid...is expensive + if you will charge accumulators ....these are expensive...
Etc stuff...
Some ppl just are using solar panels as electricity source to heat water in boiler and are installing heat accumulator...buying add insulation for this stuff...
While IMHO for water heating solar collectors are better: no electricity....
Ofc anyway there will be expenses for installation and " boiler " ....if heat acc then even more....
Still electricity isn't cheap and natural gas too...even wood fuel looks that will not be cheap...
Hot water ppl usually more are using im hot summer...when water level in rivers isn't high and a lot of power plants does have maintenance period to prepare for winter...
Even a lot of dams does have up keep maintenance scheduled in hot, warm and dry summer periods...
With good materials and workers you will be safe for next 10-25 years....
Different thing is about ROI and pros/ cons if you will connect this as micro generator to grid....
Then there will be " nice " contract "...
Also stuff isn't cheap....
Inverter....if hybrid...is expensive + if you will charge accumulators ....these are expensive...
Etc stuff...
Some ppl just are using solar panels as electricity source to heat water in boiler and are installing heat accumulator...buying add insulation for this stuff...
While IMHO for water heating solar collectors are better: no electricity....
Ofc anyway there will be expenses for installation and " boiler " ....if heat acc then even more....
Still electricity isn't cheap and natural gas too...even wood fuel looks that will not be cheap...
Hot water ppl usually more are using im hot summer...when water level in rivers isn't high and a lot of power plants does have maintenance period to prepare for winter...
Even a lot of dams does have up keep maintenance scheduled in hot, warm and dry summer periods...