Privacy Policy
This policy explains what Sundial (“Sundial,” “we,” “us”) collects, why, and what you can do about it, when you use the Sundial app and SundialEV.com (the “Service”). We’ve kept it short and plain.
The short version
Sundial collects the account, vehicle, and energy data it needs to optimize your EV charging — and our goal is to collect nothing beyond that. We don’t sell your data, and you can disconnect any integration or delete your account at any time.
What we collect
- Account information — your name and email address, provided when you sign in (for example, through Google).
- Vehicle and charging data — information from your connected vehicle account, such as charge level, whether the car is plugged in or charging, and enough location context to tell whether it’s at home. Sundial may also send charging commands to your vehicle on your behalf.
- Energy data — solar production, home-battery level, and related readings from your connected solar or battery system.
- Usage and device data — basic logs, settings, and diagnostic information that help us run and improve the Service.
How we use it
We use this information to run the core optimization (deciding when and how fast to charge), show you status and savings estimates, provide support, keep the Service secure, and improve how it works. We don’t use your data for advertising.
Third-party integrations
Sundial connects to a small number of services to do its job. With each, we share only what’s needed for that purpose:
- Tesla — to read your vehicle’s charging status and send charging commands.
- Enphase — to read your solar production and home-battery data.
- Google — to sign you in and verify your identity.
- Anthropic (Claude) — to power in-app assistance and natural-language features; when you use them, the text of your request and limited related context may be processed to generate a response.
Each of these services has its own privacy policy that governs how it handles your data.
Sharing
We don’t sell your personal information. We share data only: with the integrations above to provide the Service; with service providers who help us operate it (for example, hosting); when required by law; or as part of a business transfer, with notice.
Retention
We keep your information while your account is active and as needed to provide the Service. When you delete your account, we delete or de-identify your personal data within a reasonable period, except where we’re required to keep some of it to meet legal obligations.
Security
We use reasonable technical and organizational measures to protect your data, including encryption of sensitive credentials and tokens. No system is perfectly secure, but we work to keep yours safe and to limit what we collect in the first place.
Your choices
- Disconnect any integration (Tesla, Enphase, and others) from the app or the provider’s settings to stop further data access.
- Delete your account to remove your data.
- Revoke Sundial’s access directly with Tesla, Enphase, or Google through their own account controls.
Children
Sundial isn’t intended for anyone under 18, and we don’t knowingly collect data from children.
Changes
If we update this policy, we’ll post the new version here and update the date above; significant changes will be communicated through the Service.
Contact
Questions or requests about your privacy? Email sundialev@gmail.com. See also our Terms of Service.