Thanks you so muchof course they can. it's a question of how much $ you want to pay and how much sun you get.
pretty much here it can be so variable that solar isn't good enough for anything in the winter, you can get a few sunny days at a time and then not have sun for six weeks in a row. this past late winter was the sunniest i remember in a long time.
instead of investing in solar here it makes a lot more sense to encourage the power company to invest in wind energy, more transmission lines and to also help people have better insulation and other things that help with efficiency for heating, hot water, cooking and lighting.