Many experts are skeptical about the use of solar panels because of their effectiveness only in the warmer months and only on a sun days. Also, the snow and the hail are very negatively affected by them. So will this technology benefit from being demanded in the future?
In my opinion, wind power plants will be popular in such places
as I said before it's too expensive.
moreover, as i know after falling snow on the solar panel, it melts and does not affect the level of electricity generation by your solar power plant. In order for the panel to self-clean, it must be installed at an angle of 15 degrees or more.
I agree with you, but if something breaks then what to do?
The construction of the solar panels is strong enough and does not require virtually no maintenance during their lifetime - which can reach 25 years or even more. In the event that something goes wrong, the components of your solar system have a sufficiently large warranty period that covers repair or replacement.
You only need to remember to wipe them away from the dust.
If available, it is advisable to use the services of a certified specialist. However, elementary service can be carried out on their own. It is necessary to regularly check the surface cleanliness of the photomodules, as the presence of a layer of dust, dirt or leaves reduces the efficiency of the system at times. In practice, this cleaning does not have to be done often, since periodic rains quite well allow this problem. To clear the solar panels from a dirt can be by means of simple water, a non-rigid chutki and detergents.
If I will put my solar panels on, I would use the services of a certified specialist
I would first have tried myself. and then if broken, then I would ask for help from specialists
. This is just very interesting. 
Ha ha, it can be too expensive for me