Each season has its pros and cons for installing PV panels.
Spring can be perfect for accomplishing a solar project. A comfortable temperature and a more extended light day enhance the effectiveness of the installer's crew.
However, it's more likely the roof will need a repair after the long winter season.
Summer is a peak for most solar companies. You can get the maximum outcome immediately after the PV panels installation.
However, the installation cost is exceptionally high this season, and contractors have less time to dedicate to your project.
Fall is a good season for installers and homeowners to get off-seasonal discounts. However, solar panels will produce less power.
Winter is not the best season, but many companies offer cheaper and faster installation rates. You also need to remove snow and ice from your roof.
It's up to you what season to choose, considering the cost and preliminary work to be done.