Lithium Batteries Power Silent APU Alternative for Full 10-Hour Rest

Key Details Dragonfly Energy is bringing lithium iron phosphate battery technology to the trucking industry, targeting a market traditionally dominated by diesel-powered auxiliary power units. The company, which spent a decade serving marine and RV customers, is now focusing on trucks after deciding three years ago to enter the market. How It Works Dragonfly's system uses a lithium battery charged by the truck's alternator to power the APU, delivering electricity, heating, and cooling throughout the mandated 10-hour rest period. This eliminates the need to run the main truck engine or a diesel-fueled APU, which typically burns 0.8 to 1.2 gallons per hour. Why It Matters The technology addresses two critical pain points for drivers: noise pollution and fuel waste. Diesel APUs create significant noise that disrupts sleep, while the silent lithium alternative allows drivers to rest undisturbed. Compared to lead acid battery options, lithium systems store more power and weigh 160 to 200 pounds less, improving efficiency and payload capacity. Drivers attending the TCA annual meeting praised the quiet operation, with one noting the system eliminated what felt like running a lawnmower beneath the cab during rest periods.