Forecast API
The Forecast API endpoint provides near-term, high-resolution 15-minute time-series data spanning +7 days and -30 days
from the current day for photovoltaic (PV) systems based on their site's location and installation characteristics.
This endpoint supports GET requests that require latitude, longitude, as well as the slope and orientation
of the PV system.
For users on the free plan, forecast data is limited to +1 day (includes today and tomorrow) and no days in the past
Request limits depend on the plan:
- Free: 40 requests per month
- Paid plans: 1,000 requests per month
- Nowcast plan: 3,000 requests per month
Fair use applies. Limits are subject to change. Custom limits may apply depending on subscription and user.
Regardless of plan, a rate limit of 10 requests per second applies. Exceeding this returns 429.
Nowcast
Satellite nowcast data (~1.5 × 1.5 km) enhances the forecast with high-resolution data and is enabled by default for users on a Nowcast plan. It can be disabled by passing nowcast=False as a URL parameter.
Updates: Every 10 minutes across Europe. Every 15 minutes in selected regions outside Europe.
Base URL
The Base URL for this endpoint is:
Code
Example Request
The following examples demonstrate how to pass the required parameters and include the API key
for authentication. The example uses a slope of 30 degrees, an orientation of 180 degrees (south-facing), and
the location is set to Rosenheim, Germany with coordinates latitude: 47.84812, longitude: 12.06231.
This covers the base configuration. The API supports many additional parameters for shading, tracker systems, module characteristics, and more — see the API Reference for the full list.
Advanced Configuration
Shading & Horizon
Configure horizon profiles, row shading, and other shading scenarios.
Tracker Configuration
Set up single-axis and dual-axis tracker systems with custom parameters.
Demand Profiles
Include load profiles to model self-consumption and grid feed-in.
Weather Codes
Reference for weather condition codes returned in the forecast response.
Data Columns
Full reference of all fields returned in the forecast response.