Rivian’s Latest Software Update Boosts Fast Charging Speeds

Rivian’s latest software update, version 2025.18, is now rolling out—and thanks to a behind-the-scenes look from Kyle at Out of Spec, we’re finally seeing some real progress in fast charging times, especially for Gen 2 R1 vehicles.

Let’s break down the key improvements across battery packs:

Max Pack (Gen 1 & Gen 2)

• Peak charging speed increased slightly from 206 kW to 215 kW.
• 10–80% charge time is down from 41.5 minutes to 38 minutes.
• In just 15 minutes on a fast charger, you’ll now gain 135 miles, up from 129.

Large Pack (Gen 2 only)

• This one got the biggest bump, peak charging speed jumped from 162 kW to 215 kW.
• The 10–80% session dropped from 41.5 minutes to just 35.5 minutes.
• And your 15-minute top-up? Now 137 miles, up from 109.

Standard Pack (Gen 2 only)

• While the 215 kW peak stayed the same, Rivian still squeezed out more efficiency.
• Charging from 10–80% is down to 27 minutes from 30.
• You’ll now see 132 miles added in 15 minutes, up slightly from 129.

These improvements highlight how much Rivian is refining not just vehicle software, but the overall ownership experience, especially as faster charging becomes a key competitive edge. If you’re on 2025.18 or get it soon, let us know if you’re seeing these gains at your local DC fast charger.