Solar Panels- A Good Idea?

[Kaybreh Mathis]

Hello! There is a company in my area that will install solar panels with no up-front cost, and simply take the difference in your electric bill as payment until they're paid off. I own a few apartment buildings that do not have separate utilities, so I pay all electric. At face value, going the solar route seems like a no-brainer to me. Is there anything I should be considering, that I'm missing? I'm new to REI and as utilities are easily my biggest expense (even more than the mortgage), I'm looking for ways to help offset that cost. Would appreciate any input!