Welcome to Forecast.Solar
Restful API for Solar production forecast data and Weather forecast data.
powered by PVGIS, Dark Sky, Wunderground and OpenWeatherMap
Features
Forecast.Solar provides data based on your location, the declination and orientation of your solar panels.
Solar production
The weather based solar production forecast, historic averages and clear sky optimum provides watt powers and kilo watt energy data.
Weather
The weather forecast
provide sky coverage amount, textual weather condition and icon URL,
temperature and some wind information.
(Professional account)
Chart
Draw a daily
solar production forecast chart
with simple Javascript snippets.
(Professional account)
Solar production forecast and weather forecast data are provided for up to 7 days with a resolution of 1 hour down to 15 minutes.
If you then checked the documentation and you like it, register an account to more features.
As example you can take a look at my data logger which compares the actual production and the forecast data.
A good match of forecast and actual production can you find at the 2nd of November 2015.
Restful API
Example: Get solar production estimate
You can easy build and test the required URLs with the Swagger-UI.
Request
https://forecast.solar/<your-API-key>/estimate/54.9/25.3/37/0/1Response (professional account, 15 minutes resolution)
{
"result": {
"watts": {
"2015-06-22 05:15:00": 17,
"2015-06-22 05:30:00": 22,
"2015-06-22 05:45:00": 27,
...
"2015-06-29 20:15:00": 14,
"2015-06-29 20:30:00": 11,
"2015-06-29 20:45:00": 7
},
"watt_hours": {
"2015-06-22 05:15:00": 0,
"2015-06-22 05:30:00": 6,
"2015-06-22 05:45:00": 12,
...
"2015-06-29 20:15:00": 2545,
"2015-06-29 20:30:00": 2548,
"2015-06-29 20:45:00": 2550
},
"watt_hours_day": {
"2015-06-22": 2626,
"2015-06-23": 2918,
"2015-06-24": 2526,
"2015-06-25": 2866,
"2015-06-26": 2892,
"2015-06-27": 1900,
"2015-06-28": 2199,
"2015-06-29": 2550
}
},
"message": {
"type": "success",
"code": 0,
"text": ""
}
}
Chart
You can direct draw chart for solar production estimate using the Forecast.Solar widget.
(Professional account)
Chart for the geographical midpoint of Germany at 51°9'N,10°27'E with a declination of 37°, looking south with 10 kilo watt peak installated.
Today
(Without given title or subtitle, no tile is printed and subtitle defaults to date)
Tomorrow
(Title with date placeholder, no subtitle is printed)
It is also possible to show charts of the historic average data and the theoretic data for clear sky conditions.
Todays historic average production
(Title without date placeholder, subtitle defaults in this case to the date)
Todays theoretical clear sky production
(No title given but subtitle with placeholder)
Account models
You should consider to register an account for more features.
Compare plans in detail.
Public
No registration required, free for life.
- Solar production forecast data
- Forecast horizon: This and the next day
- Data resolution: 1 hour
Best for users without loggers to get a quick idea about coming solar production.
Personal
Registration with a valid email required, access with personal API
key.
Free trial of 14 days, see for prices the
registration page.
- Solar production forecast data
- Average solar production data based on historic irradiation data
- Forecast horizon: This and the next 3 days
- Data resolution: 30 minutes
Best for users with loggers to integrate the data automatic.
Professional
Registration with a valid email required, access with personal API
key.
Free trial of 1 month, see for prices the
registration page.
- Solar production forecast data
- Solar production forecast chart
- Weather forecast data
- Average solar production data based on historic irradiation data
- Theoretical solar production data under clear sky conditions
- Forecast horizon: This and the next 6 days
- Data resolution: 15 minutes
Best for business users with more than one plant and/or loggers to integrate the data automatic.
Support channels
An Issue tracker and a Questions & Answers site are available for support.
Forecast your Solar production
With the increasing share of photovoltaics in the electricity market, the importance of Solar energy forecasts. These are an important tool for the integration of Solar power into existing network structures.
The production of solar power is dependent on external influences on which man has no or only limited influence. For example, Season, time of day, weather (eg ambient temperature, clouds, air turbidity).
A solar day covers the global energy supply for eight years.
Predictions about the availability of solar-generated electricity in the future support private power management, but are of great importance, above all, for commercial solar power generators and network operators.
OpenWeatherMap