Also, it seems like you might be using the word 'financing' to mean "paying for."
That's kind of technically correct, but it will confuse your readers. Generally in the context of real estate, 'financing' means "borrowing to pay for," and if you're saving up for it, then people say, 'paying cash for,' even if they mean "writing a check for."
Other people's money is 'financing'; money that's yours is 'paying cash.'
(Not trying to pick on you here- just want to help you get the answers you're after.)
One more thing.

Saolr panels are awesome, but they're a way to pay ALL of your electric bills up-front. In other words, it's a big chunk of money right away so that you don't have an ongoing electric bill. That's going to be significantly more expensive than a standard grid-tie.