Converting your whole house to solar power can be expensive. Before you commit, look at how much you can afford. The initial investment will be very large, but there will come a time when you will break even, then start realizing your savings. Work out the numbers so that you will know how it will affect your long-term budget.
How dense your solar panels are will determine their efficiency. Getting high density solar panels may cost you quite a bit, but after a while they'll pay for themselves because they produce more power. Before you select your solar panels, you should consider panel density.