Tesvian delivers precision telemetry for Tesla owners and fleet operators: real-time battery degradation tracking, charge curve and vampire drain analysis, drive efficiency logs correlated with elevation, speed, and HVAC use, and location-based Sentry Mode automation. Cost reports simplify electricity expense tracking for taxes. Data is protected end-to-end with AES-256 encryption and retained in full. Polling starts at 5 seconds; the Plaid tier unlocks unlimited vehicles and 1-second sampling.