Elevation is a crucial factor to consider when planning road trips with electric vehicles (EVs). While technically a net change in elevation may result in zero range loss, the reality is that climbing and descending steep elevations can significantly impact an EV’s efficiency. Just like hiking up and down a mountain requires more effort than a flat-ground trek, EVs have to work harder moving up hills, generating excess waste heat, and dealing with energy loss in regenerative braking.
A recent test conducted by TFLEV showcased the impressive performance of the Chevy Blazer EV SS in handling elevation changes. In the test, Jen took the SS from around 5,000 feet of elevation up to 12,000 feet, a 7,000-foot climb. Despite the challenging terrain, the Blazer delivered just 1.8 miles per kWh, which is lower than what a big electric truck would achieve on level ground. After climbing 73.3 miles, the Blazer had used 36% of its battery, despite having a 303-mile EPA range.
However, the efficiency of EVs shines through in scenarios like this. While a gas car would also experience a significant range loss when climbing steep elevations, the energy consumed during the ascent would be lost forever. On the other hand, an EV can recapture some of that energy on the way back down, thanks to regenerative braking.
Upon returning to the starting point, Jen still had 56% of the battery remaining, despite covering 147 miles. The Blazer had used only 44% of its battery capacity, outperforming its range estimate despite the grueling 7,000-foot climb. This test highlights the efficiency and resilience of EVs in handling challenging terrains and elevation changes, showcasing their potential for long-distance travel.