My favorite solar scam is the Power Purchase Agreement:

• company installs solar, you pay $0
• typically sized to generate 100-150% of your consumption
• company bills you ~80% of your actual or previous average use
• price is on contract and has scheduled increases
• after 15-20 years, negotiate a new contract, maybe buy the system, or have it removed

What if solar gets 20x better? Fusion gets solved? Too bad, contract pricing.