Subaru Uncharted GT DC Fast-Charging Beats Official Specs
Independent testing shows the 2026 Subaru Uncharted GT charges faster than its official specifications, reaching a peak of 163 kW and adding 100 miles of
The 2026 Subaru Uncharted GT charges faster than Subaru claims. According to a test by the YouTube channel State of Charge, the electric SUV added 100 miles of EPA range in just 10 minutes and completed a 10% to 80% charge in 25.5 minutes, beating the official 28-minute estimate.
State of Charge conducted the analysis using a 324-kW EVgo charger. The test vehicle was a 2026 Subaru Uncharted GT equipped with a 74.7 kWh battery and 20-inch wheels. The findings also apply to the related 2027 Subaru Uncharted, the 2026-2027 Toyota C-HR, and other Toyota, Lexus, and Subaru models sharing the same battery pack.
Charging Performance Exceeds Claims
The vehicle's peak charging power hit 163 kilowatts, surpassing its rated maximum of 150 kW. The test recorded an average power of 121 kW for the standard 10% to 80% state-of-charge window. Starting the session from 0% battery yielded an even better average of 131 kW for charging up to 70%.
The full charging session from 0% to 100% took 50 minutes and 39 seconds. The channel noted that charging from 90% to 100% alone required about 15 minutes, calling it ineffective for typical use. "As usual in many EVs, charging beyond 90% SOC is not effective and should be avoided if not necessary," the report stated.
The Charging Curve and Thermal Management
Charging power climbed quickly after initiation, exceeding 150 kW by the time the battery reached 3% charge. It peaked at 163 kW around 35-36% state of charge. Shortly after, the power began to drop in a series of sharp declines and recoveries.
The analysis suggests this pattern indicates thermal throttling, where the vehicle's system reduces power to manage battery temperature before allowing it to climb again. The average-to-peak power consistency ratio was calculated at 0.74. The report concluded that without this aggressive throttling, the shape of the charging curve would be good.
For the technically minded, the peak C-rate-a measure of charging speed relative to battery capacity-reached nearly 2.2C. The average C-rate was 1.6C for the 10-80% window.
Range Replenishment Rates
The test measured how quickly the SUV could add real-world driving distance. Using the EPA Combined range estimate of 273 miles, the average range replenishment rate was 7.5 miles per minute during the 10-80% charge. The rate was highest at the start.
| Charging Time Period | Average Range Replenishment Rate (EPA) |
|---|---|
| 0-10 minutes | 10.0 mi/min |
| 10-20 minutes | 7.2 mi/min |
| 20-30 minutes | 5.4 mi/min |
| 30-40 minutes | 3.4 mi/min |
| 40-50 minutes | 1.1 mi/min |
Applying the vehicle's tested 70-mph highway range of 255.1 miles, these replenishment rates are proportionally lower by about 6.5%. This means adding 100 miles of real-world highway range would take approximately 11 minutes.
Practical Charging Timelines
The analysis provides clear timelines for drivers needing to add specific amounts of range. Based on the EPA figure, the Uncharted GT can add 150 miles of range in about 17 minutes and 200 miles in about 25 minutes. Using the 70-mph range, adding 150 miles takes over 18 minutes, and adding 200 miles takes nearly 28 minutes.
The most efficient charging period lasted about 9.8 minutes, from 1% to 37% battery, where power stayed at or above 75% of the peak. More than half of the peak power was available for a substantial 27.5 minutes, up to 79% state of charge.
State of Charge cautions that results can vary based on the specific charger, battery and ambient temperatures, the vehicle's software, and the starting state of charge. The test was conducted without pre-conditioning the battery, but the channel reported that multiple sessions in good weather showed similar results with or without it. The vehicle used its native NACS port with a CCS1 adapter for this test on a charger lacking a native NACS connector.
