Subject: Power Your Home with Invisible Energy!

Hi [Name],

Want to slash your energy bills without lifting a finger? Meet SolarWindow!

Just apply our energy-harvesting transparent window film to your existing windows, and watch them transform into mini power plants. It's that simple!

🌞 Save on energy costs
🌞 Enjoy eco-friendly power
🌞 Seamless fit for any window

Don't miss out on this game-changing technology. Click here to see how SolarWindow can brighten your life!

Best,
[Your Name]  
[Your Company]