Rhombus Energy Solutions

Rhombus Energy Solutions, founded in 2012 by Parthiv Patel and Rick Sander, operates as a developer of power management and energy storage solutions. The company was acquired by BorgWarner on August 3, 2022, in a deal with an enterprise value of up to $185 million, strengthening BorgWarner's electric vehicle charging portfolio in North America. Rick Sander, the CEO, has over three decades of experience in engineering and management, including leadership roles at HP, PACCAR, and Bombardier. Co-founder Parthiv Patel's background also contributed to the firm's technical foundation.

The company specializes in the design and manufacturing of high-efficiency power conversion systems, electric vehicle charging infrastructure, and energy management system (EMS) software. Rhombus serves a clientele that includes EV original equipment manufacturers (OEMs) like Proterra and Blue Bird, as well as charging and grid service providers such as Nuvve. Its business model centers on providing standalone products, power conversion modules, semi-custom configurations, and contracted product development services. The firm's revenue is generated from the sale of these advanced power electronics and related services, with an estimated annual revenue of around $12.3 million prior to its acquisition.

Rhombus's product line features patented, next-generation bi-directional EV charging technology, which is a key differentiator. This includes Vehicle-to-Grid (V2G) capable DC fast chargers that allow electric vehicles to not only draw power from the grid but also return it, enhancing grid stability. The company's chargers, such as the EV2flex™ line, utilize Silicon Carbide (SiC) MOSFETs to achieve greater efficiency, increased power density, and faster charging times. For instance, the "Rushmore" architecture introduced in 2022 leverages SiC technology to create modular 60kW power blocks, offering flexibility in charger configurations from 60kW to 120kW. These UL-1741-SA certified systems underscore the company's focus on high-reliability solutions for the growing EV fleet and commercial vehicle markets.

Keywords: EV charging infrastructure, power conversion systems, vehicle-to-grid (V2G), DC fast charging, energy management systems (EMS), bi-directional chargers, power electronics, electric vehicle OEMs, grid services, Silicon Carbide (SiC) technology, high-power charging, fleet charging solutions, Proterra, BorgWarner, energy storage solutions, microgrid applications, Rick Sander, Parthiv Patel, EV2flex, Rushmore architecture