Certification filings from the U.S. Environmental Protection Agency, first identified by users on the Rivian Forums, show that the 2027 Rivian R2 will feature an 86.8 kWh battery pack capable of delivering more than 300 miles of driving range.
The documents indicate a usable battery capacity of 86.8 kWh, exceeding earlier expectations for the company’s dual-motor platform. The system supports peak DC fast charging of up to 210 kW, according to the filings.
Range performance varies depending on wheel configuration. Models fitted with 21-inch all-season tires are rated at up to 335 miles, while versions equipped with 20-inch all-terrain tires achieve an EPA-certified range of 314 miles.
The filings also list a curb weight of 5,250 pounds and a gross vehicle weight rating (GVWR) of 6,173 pounds, implying a payload capacity of approximately 1,175 pounds.
The specifications highlight the engineering trade-offs facing automakers in the mid-size electric SUV segment, where balancing battery size, weight, and cost remains critical to maintaining competitive range performance.
The data suggests Rivian has focused on efficiency improvements to achieve over 300 miles of range without significantly increasing battery size. This approach is increasingly important as consumer expectations for longer driving distances continue to rise.
The EPA filings also outline updates to the vehicle’s thermal management and software systems. A redesigned heat pump has been repositioned to reduce vibration and cabin noise, while new onboard software includes battery health monitoring features for owners.
Additional technical details include a nominal capacity rating of 260.8 Ah under a constant current C/3 discharge rate and system-level thermal controls designed to support sustained high-speed charging. The company has also incorporated lifecycle planning measures, including provisions for second-life battery use and recycling.