Define average. My electricity needs vary radically. Summer usage is typically 2 1/2 times winter. Water usage is similar. Much more in the summer. Natural gas usage peaks in January and is at a minimum in the summer.
Trying to run solar panels with snow and temperatures that can drop to -20 F isn't reasonable.
I said it was not economically feasible. Possible, yes. There is enough square feet of roof to support the house, even in the winter in the US. As for the snow, hire someone to brush it off each morning.