An average US home uses 3 kilowatts of electricity. Another 3kw if it's charging an electric vehicle. Another 3kw if there are significant power requirements for heating or cooling.

Solar panels heat up. If they are mounted flush against your roof, your roof will heat up through heat conduction. If they are raised for better ventilation and cooling, you must consider the bracing's snow weight capacity, and ability to resist wind uplift.

Solar panels become less efficient when they are hot. It is worth raising them, and dedicating some of the solar energy towards cooling the panels themselves.

If solar panels are immobile, they will have a peak distribution based on where they are pointed. Mobile or tracking panels can follow the sun and stay closer to peak output during the day.

Solar panels do not deliver energy at night. If you tie your panels to the electric grid, that's a balancing problem for your electric utility (which hopefully is publicly or coöperatively owned). If you're off-grid, you need to find a way to store electricity if you want to use it at night. There are many ways to do this. If you're on a hill, and have enough land, consider pumped storage.

It's easy to uglify a pretty house with poorly-considered solar panel placement. Consider harmonious unfolding for your design.