Reducing Energy Costs Through Vehicle Electrification

(Joseph Gottlieb, CTO, Tuesday January 19, 2021)

There are a lot of ways that electrifying your vehicle fleet can benefit both the environment andyour business. One of the largest benefits that medium and heavy duty (M/HD) electric vehicle (EV) operators can reap from electrification is the reduction of energy costs. For a Class 6 local delivery truck in California that gets 10 miles per gallon of diesel fuel, the average energy cost is $0.34 per mile. In contrast, the cost of electricity for an electrified version of the same vehicle is $0.21 per mile (a $0.13 per mile savings). For larger vehicles such as a refuse truck which gets 2.5 miles per gallon, the cost of diesel fuel is $1.36 per mile, while the electrified version of the same refuse truck would have an energy cost of $0.84 per mile (a $0.52 per mile savings).

How much of an annual savings does this represent? For the class 6 delivery truck driving 12,000 miles per year, this is an energy savings of $1,560 per year, or nearly $19,000 over a 12-year life. For the refuse truck driving 25,000 miles per year the annual energy savings is $13,000, or $156,000 over the life of the vehicle (assuming a 12-year lifespan). If the vehicle and charging infrastructure are vehicle to grid (V2G) capable, the savings can be even greater. These are huge savings that can make a fundamental difference to the business model of a company, or to a government organization operating such vehicles. This is yet another reason why electrification is progressing quickly for M/HD vehicles.

Rhombus has built high-power inverters for renewable energy such as “behind the meter” grid energy storage systems for several years. We have applied that expertise to the design of our latest-generation bi-directional EV charging systems (which are designed from the start for the needs of fleet operators) and bi-directional smart inverter systems for microgrids. Rhombus expertise in energy management system (EMS) software is also embedded in our VectorStat EMS controller and software which is embedded in our EV charging systems and smart inverters. Rhombus also excels in the design and testing of high-power electrical equipment to meet the requirements of UL and other certification organizations. We have built hundreds of V2G-capable high-power, high-reliability chargers and bi-directional smart inverters for a variety of different sizes and classes of EVs. Find out how we can help you by contacting us at, or by reading our Vehicle to Grid Solution Brief.