Financing a solar system is one option, but paying cash will result in the fastest payback of your new solar system which will reduce or eliminate your monthly utility bill.
A second option is to refinance your home. This option will allow you to produce your own power, save hundreds of thousands of dollars, and consolidate your higher interest debt into one low monthly payment. This option may be eligible for a tax deduction (check with your tax advisor).
The third option is to finance the solar project with an unsecured fixed loan. Your bank or credit union may be a better resource because of your existing financial relationship. Integrity would be happy to provide you with current programs and rates currently available.
You need to consider that when you make finance payments on a solar system, you are spending money that you would have already spent on a utility bill. Once the loan is paid off, you are cash positive for the rest of the life of the solar system. Your savings will be substantial over the life of the system.