Did a salesperson knock on your door and promise free rooftop solar panels at no cost to you? Or say you’ll never have to pay another electricity bill because government programs, grants, or rebates cover your solar installation? It’s likely a scam. While there are some government-funded solar programs for households that qualify, “going solar” isn’t free. Honest businesses will tell you exactly how much it’ll cost to get and install solar panels. Here’s how to steer clear of the scams.