You can install our site as a web app on your iOS device by utilizing the Add to Home Screen feature in Safari. Please see this thread for more details on this.
Note: This feature may not be available in some browsers.
They went back and forth on that I think. It started out as 56kWh then changed to 53kWh early on. Perhaps they decided to de-rate the pack a bit (not charge to 100%) for longevity reasons?