Retrieve site energy and power data from the SolarEdge monitoring API

Steps

1. Obtain a site API key from the SolarEdge monitoring portal under the Admin panel for the target site; the key is per-site and passed as the 'api_key' query parameter.
2. Call GET https://monitoringapi.solaredge.com/sites/list?api_key=<API_KEY> to enumerate sites accessible with the key, retrieving site IDs.
3. Retrieve energy production over a time period via GET /site/<SITE_ID>/energy?timeUnit=DAY&startDate=YYYY-MM-DD&endDate=YYYY-MM-DD&api_key=<API_KEY>; supported timeUnit values include QUARTER_OF_AN_HOUR, HOUR, DAY, WEEK, MONTH, YEAR.
4. For real-time power data, call GET /site/<SITE_ID>/currentPowerFlow to get current power flow between panels, battery, grid, and load.
5. To access inverter-level telemetry, use the equipment endpoints such as GET /equipment/<SITE_ID>/list to get serial numbers, then GET /equipment/<SITE_ID>/<SERIAL_NUMBER>/data for detailed telemetry.