How long do electric batteries last?
Like all batteries they will start to degrade over their lifetime and the battery life of an EV will vary depending on the make and model of the vehicle. The battery capacity retention ratio may decrease depending on the customer's usage environment (such as weather and traffic conditions) and driving method (for example, sudden acceleration or use of air conditioning). Subaru offer an eight year or 100,000 mile warranty for their EV batteries.
The Subaru Solterra boasts a newly developed high-capacity battery and a heat pump fitted as standard – to maximise the driving range in all conditions. To further improve longevity, the battery structure and charge control have been developed with the aim of achieving a 90% range retention rate after 10 years for added peace of mind.