Hard boiled eggs in 4.5 hours at 4500 feet. May have been done in 4 but didn’t check. Temp 82 degrees at 2 pm. Put eggs in a paper carton into a preheated solar oven. Keep oven focused on the sun turning every 20-30 minutes. Note the heavier the clouds the longer it will take, also cooler temps can increase the cook time.
Solar ovens have little or no smell while cooking unlike grilling.