Why do Pellet Grills explode?

Chef's answer
When a pellet grill gets shut off suddenly in a power outage, the fire goes out, and pellets cannot burn, ... If there are leftover wood pellets in your grill the next time you start it, the firepot will be fed too many more wood pellets. Too much fuel always triggers an explosion.
Frequently asked Questions 🎓
Under normal circumstances, a pellet grill will use about 1/2 pound of pellets per hour on the smoke setting and 2-1/2 pounds on high.
24 hourswhen full. The Pit Boss Vertical Smoker provides a spacious cooking area for you to enjoy cooking anything and in just one shot. It has five cooking racks, with 2,196 square inches cooking area. This hopper has a capacity of over 40 lbs and pellet purge that can last over 24 hours of use.
Leaving unused pellets in your hopper can cause them to rot since they will be exposed to the elements of your outdoor environment. ... Emptying your hopper after each cook and storing the leftover pellets in a secure device like sealed bucket can ensure your pellets last as long as possible..
A few more cooking questions 📍