THE HONEST 7-YEAR TEST / DOES IT STILL WORK?

The Old Jarhead

Back in 2017, I built a solar heater using nothing but pop cans, wood, and insulation to heat my off-grid cabin porch. After 7 years of real-world use, here's my honest review of what worked, what failed, and whether this DIY project was actually worth the effort. Check out my followup video here: