Well don't put them on the roof unless you're putting a brand new roof on first. And don't get them unless you have a shed far away from your house for the batteries. And don't do it to save money because it will take 10+ years to earn it back. And don't do it if you think you're saving the environment because the expansion of Lithium mines is destroying most of America's water sheds and small towns.

Why exactly do you want Solar?