Go Green APU manufactures auxiliary power units (APU) for semi-trucks. The use of a Go Green truck APU reduces truck engine idling allowing for fuel savings up to $7,000 annually. The use of our APU units for trucks can save on truck engine repairs and service. Go Green APU offers two different truck APUs to fit your needs; the Adam model and the Evolution model. Both truck APUs are stand-alone models which can operate in extreme weather, endure rugged over-the-road conditions, and perform to the highest operating standards of any APU on the market today. The Adam APU unit for trucks is Go Greenâ?Ts original APU, while the Evolution APU unit for trucks is smaller sized for reduced frame rail availability with a sliding frame system for service. Go Green APU also offers rebuilt auxiliary power units for semi-trucks that offer up to 30% savings off retail pricing that includes up to a 1-year warranty. We offer generous leasing options for our truck APU units to reduce your costs.