Depending on use, the battery may degrade as little as 10 percent to as much as 40 percent, the manufacturer says.
Motor Trend’s 2017 Car of the Year, the Chevrolet Bolt, is already heading to California for first customer deliveries, and the manufacturer has prepared and released a comprehensive owner’s manual for the electric vehicle.
While most of the text explains standard situations, the GreenCarReports has discovered the automaker is warning of potential battery degradation of up to 40 percent during the eight-year warranty period – or within 100,000 miles.
On page 322 of the owner’s manual, Chevy says: “Like all batteries, the amount of energy that the high voltage ‘propulsion’ battery can store will decrease with time and miles driven. Depending on use, the battery may degrade as little as 10 percent to as much as 40 percent of capacity over the warranty period. If there are questions pertaining to battery capacity, a dealer service technician could determine if the vehicle is within parameters.”
Doing the simple math shows a customer could lose up to 102 miles from the 255-mile EPA range of the Bolt in a course of eight years – and that’s not what you should expect, but what is covered under warranty.
Tesla, on the other side, is not covering battery degradation under its eight-year, unlimited mileage warranty. “The Battery, like all lithium-ion batteries, will experience gradual energy or power loss with time and use. Loss of Battery energy or power over time or due to or resulting from Battery usage, is NOT covered under this Battery Limited Warranty. See your owner documentation for important information on how to maximize the life and capacity of the Battery.”
Production of General Motors’ affordable electric vehicle started in early November at the company’s Orion Assembly Plant. According to a new report from The Detroit News, it takes three days for a Bolt to be assembled. Some of the already manufactured examples have been transported to the plant’s proving ground and are waiting to be delivered to customers.