The EV400 Portable Charging Unit resolves concerns for both dealerships and tow companies by offering a cost-effective and practical solution to maintaining fleet batteries and providing roadside assistance. It runs on clean fuels like propane, as well as gasoline, and can be wheeled around with ease. It can also it easily into the back of a truck and allows for tow companies to generate new revenue streams and get paid for the equivalent of a full tow in as little as 15 minutes of charging.