Make sure to allow for adequate spacing around your solar panels. When overheated, these panels do not work effectively, and this can diminish the amount of energy they create for your family. Allowing for space between and around each panel helps to promote air flow and maximize both the functioning and lifespan of your panels.
A solar powered fan for your attic is a good choice if switching completely to solar power is not feasible. The fan will have a temperature sensitive gauge and switch itself on when necessary. This will remove heat and lower the cost of cooling. It's also solar powered, so you don't have to pay to power it.
When you are figuring out the return on your solar power investment, do not forget that you can sell back energy to your utility company if you generate a surplus. This is usually in the form of a credit on your utility bills. Even though the initial investment may be hefty, the long-term financial benefits is there for the taking.