To onboard an AP Systems site just two items are required. A set of credentials (username and password), and an agreement to their terms of service.
https://apsystemsema.com/ema/index.action
Login with your username and password.
If presented, agree to the APS terms and conditions.
Re-enter the same username and password on the Rewatt site. This will be stored securely on Rewatt servers in order to routinely collect generation data.
Note: this may change in the future when APS releases a more secure API.
Click the Test Connection button. If all is well, you will be greeted with a green success message, and you can press Next to move on.