How does the app work?
A useful guide for understanding how our mobile app uses data to understand battery health
ClearWatt's independent app-based battery health test collects real world data from your EV through either charging or driving the vehicle. We require a combination of 3 drives or charges to complete a test. Fundamentally, we use two distinct metrics to understand battery health: real-world driving range and real-world energy capacity.
Driving
When drives are recorded with our app, advanced mobile telematics are used to pull vehicle location from the phone every second. This allows the system to map characteristics of drives (speed, elevation, acceleration, weather, temperature etc.) against the energy consumed on those drives. The energy consumption data is gathered directly from the vehicle or from photos captured by the driver at the start and end of the session. All of this data is used to calculate the normalised driving range of the vehicle and finally compared against a brand-new benchmark figure.
Charging
When charges are recorded with our app, we use connected charger data in combination with the data pulled directly from the vehicle or photos captured by the driver at the start and end of the charging session. We're also extracting environmental data and other key charging indicators during the charging session. We use all of this data to calculate the amount of energy placed into the vehicle during a charging session and calculate a normalised battery capacity for the vehicle and finally compared against a brand-new benchmark figure.