Summary
- Rivian has introduced upgrades to the second generation R1S and R1T vehicles, including a faster-charging lithium-iron phosphate battery pack for the base version
- Charging speeds are crucial for EVs, and Rivian’s LFP chemistry offers advantages over traditional nickel-manganese-cobalt packs
- The 2025 Rivian R1S showed significant improvement in charging times after receiving a software update, making the base model the fastest charging trim
- The base R1S reached a peak charging rate of 218 kW and can add roughly 90 miles of range in 15 minutes
- While the R1S delivered about 240 miles in a highway range test, it has a usable battery capacity of 92.5 kWh, providing an improved charging experience compared to previous Rivian models
Article
The Significance of Faster Charging Times
Charging an electric vehicle (EV) can be a time-consuming process compared to refueling a traditional gasoline-powered car. However, advancements in technology have allowed for faster charging speeds, making EVs more convenient and practical for everyday use. This article discusses the importance of charging speeds in the context of the new Rivian R1S, which has seen significant improvements in its charging capabilities.
Benefits of Lithium-Iron Phosphate (LFP) Battery Packs
One of the key upgrades to the second generation R1S and R1T by Rivian is the addition of a lithium-iron phosphate (LFP) battery pack for the base version. This new battery technology offers major advantages over traditional nickel-manganese-cobalt packs, including more durability, higher operating voltage, cost advantages, and reduced reliance on conflicted materials like cobalt. While LFP packs may have lower energy density and range compared to other battery types, they offer faster charging times and slower degradation, making them a viable option for certain use cases.
Testing the Charging Capabilities of the Rivian R1S
EV expert Kyle Conner recently conducted a series of charging tests on the 2025 Rivian R1S to evaluate its performance before and after a software update. The results showed that the standard battery with the LFP pack was the "sweet spot" for most buyers, as it delivered faster charging times and improved overall performance. The R1S was able to reach a peak charging rate of 218 kilowatts, adding roughly 90 miles of range in just 15 minutes. These findings make the base R1S model the fastest charging trim in Rivian’s lineup.
Impressions from a Charging Test
During the charging test, the new R1S was able to go from 0-100% in slightly under an hour, making it a suitable companion for road trips and everyday driving. The vehicle demonstrated impressive charging speeds, with a peak rate of over 200 kW between 5-25% battery capacity before tapering off. Despite delivering slightly lower range compared to Rivian’s claimed figures, the R1S showed promise in terms of charging efficiency and overall performance.
Comparing Charging Times with Previous Models
Previous models of the Rivian R1T and R1S took approximately 40-45 minutes to charge from 10-80% capacity, with charging speeds slowing significantly after reaching 80%. Early launch edition models with a larger battery pack took 72 minutes to charge from 10-90%. The introduction of the LFP battery pack in the new R1S has significantly improved charging times, making it the fastest charging trim in Rivian’s lineup.
Future of EV Charging
As EV technology continues to advance, faster charging speeds and improved battery technologies will play a crucial role in driving the adoption of electric vehicles. The introduction of lithium-iron phosphate (LFP) battery packs in models like the Rivian R1S showcases the potential for faster, more efficient charging capabilities, making EVs a more practical and convenient option for drivers. With ongoing advancements in battery technology and charging infrastructure, the future looks promising for electric vehicles and the automotive industry as a whole.
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