Why Is A Switching Dispenser Important for Minimizing TCO?

Joseph Gottlieb, CTO, Wednesday Sept 8, 2021

Minimizing the total cost of ownership (TCO) of electric vehicle support equipment (EVSE) is critical to maximizing the return on investment (ROI) for electric vehicle (EV) fleets. This is especially true for the ROI on medium- and heavy-duty (M/HD) EV fleets. M/HD EVSE tends to be more expensive than chargers for light-duty EVs – after all, they tend to have much longer duty cycles than light-duty EV chargers. More importantly, the abilities and performance of M/HD EV chargers have a significant impact on the TCO of the M/HD EV itself, either by impacting revenue generation or in the ability of the M/HD EV to provide services. The other way that EVSE impacts the TCO of M/HD EVs is installation cost. Let’s look at how the Rhombus RES-D3-CS20 sequential switching dispenser can reduce these costs and improve TCO.

The impact of the D3 dispenser on acquisition costs is obvious – by reducing the number of PCSs required, acquisition costs for a fleet can be reduced by up to two-thirds. Of course, this depends on the use case , but even a use case where one PCS powers three dispensers can nearly cut acquisition costs in half. For installation costs, the D3 switching dispenser can reduce costs in two ways. The first is in eliminating the need for high-voltage DC switching equipment – this both reduces installation equipment costs and equipment footprint. The second and even greater reduction is in the cost of trenching required to put the power lines from the PCS to the dispensers. The cost for trenching a concrete parking lot can be up to $20,000 per 1000 feet of trench. If you have to dig trenches for 100 vehicles with an average distance of 250 feet, the cost would be $500,000. The D3 dispenser can reduce this by one-third. And when you factor in the exceptionally high reliability of Rhombus M/HD EV chargers, you further reduce the TCO by increasing vehicle availability.  

If you are looking for made in the USA high-power DC fast charging systems for those EVs, look to Rhombus Energy Solutions. Our market-leading bi-directional EV charging systems (which are designed from the start for the needs of fleet operators) are designed and built in the USA. Rhombus also excel in the design of high-power smart inverters for next-generation renewable energy and energy storage deployments. Our 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. We have built over a thousand 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 news@rhombusenergy.com, or by reading our Vehicle to Grid Solution Brief.