If you are a developer or homeowner looking to access Enphase systems' data, you can subscribe to any of the plans listed below. Sign up to the developer portal, and choose a plan of your choice to access the API. The Watt plan provides free access to 1,000 hits each month. For additional access, you can subscribe to the Kilowatt plan or Megawatt plan after adding a credit card to your account. For Kilowatt and Megawatt plans, if you reach your monthly call limit and like to continue making API call requests, please contact us at api@enphaseenergy.com. We can enable additional hits at $0.005/hit.

The API adheres to OAuth 2.0-based authorization and you must reach out to the system owner for approval. Retrieve an auth code post system owner's approval using which you can generate access and refresh tokens. Refer to the quick start guide for more details.