They want you to lease the panels. Basically, they become your new power company, likely at a lower rate than what you would pay national grid/eversource. However, they also then get all the benefits like tax incentives, net metering, and the SMART program, which the power company pays you for all the solar you generate. There are so many great benefits to purchasing/financing panels over leasing that it's a no brainer. Prices have come down a lot too since I got mine in 2018. I'd suggest using energy sage a d shop around for different prices amoung local and national installers. Don't lease.