“Free solar panels” is an old idea, and while it might be technically correct may be technically correct, paying for solar panels with cash or a loan, and maximizing your savings is often better.
Solar panels, typically in the case of a Power Purchase Agreement (PPA), are available for no money down. A solar company installs panels on your house under these conditions, which manages and operates the system. You sign a 20-year contract and pay slightly lower than the utility company you had paid for the solar electricity produced.
In the long run, a solar PPA can save you money, and it might be a good idea if, for example, you don’t have the income needed to take advantage of solar tax credits. But with “free solar panels,” the amount of money you can save is rarely as much as you would have saved by buying a system and claiming all the available incentives.