QA PV Forecast

☀️📈 QA PV Forecast

QA PV Forecast is an application for loading the solar irradiance forecast in the SHE system. It downloads an hourly forecast of irradiance (W/m²) and outdoor temperature for the installation site from the PV Forecast service (pvforecast.cz) and passes it on to other applications — QA Consumption Control uses it, together with data from QA Inverter, to calculate the predicted photovoltaic output and surplus.

💼 Business presentation

The application downloads an hourly solar irradiance forecast for the set location for today, tomorrow and the day after, together with outdoor temperature and sunrise/sunset times. The forecast is further used by QA Consumption Control, which combines it with data from QA Inverter to calculate the predicted photovoltaic output and surplus for the current and following day — based on this prediction it controls appliances and battery charging, and works together with spot-price control and energy sharing. The basic version of the PV Forecast service for one location is free. It works together with other applications in the SHE system to ensure unified optimal control.

📊 Data analysis and management

For clear visualization and for working with historical measurements and charts, we recommend connecting to SCADA Mervis.

🧩 Role in the SHE system

The application reads data from a third-party service and passes it to other applications in the SHE system:

• Forecast source — the PV Forecast service (pvforecast.cz); requires location registration and an assigned API key
• Follow-up control — QA Consumption Control takes the irradiance forecast as a source for predicting output and surplus; the calculation also needs QA Inverter (live output values and battery status)

☀️ Irradiance Forecast card

The main application card shows:

• Forecast now — current hour, forecast irradiance (W/m²) and outdoor temperature (°C)
• An Irradiance Forecast table by hour, for the Today, Tomorrow and Day after tomorrow columns
• Sunrise/Sunset — sunrise and sunset time for the given day
• Address — the location the service calculates the forecast for (based on the entered coordinates)
• Update — date and time of the last forecast load; the Update button lets you load the forecast immediately, outside the regular period

The unit's dashboard also shows the Irradiance (W/m²) and Temperature (°C) tiles — these are forecast values for the current hour, not a local sensor reading. Irradiance in W/m² expresses the intensity of solar radiation; it is not the plant's power output or a forecast of generated energy.

🔑 Registration and setup

The forecast requires location registration with the PV Forecast service and an assigned API key:

• Register at wp2.pvforecast.cz/registrace — enter your e-mail, first name, surname and the plant's coordinates (latitude, longitude and altitude); the API key is then sent by e-mail
• The latitude and longitude of the installation site in the PV_Forecast_lat and PV_Forecast_lon variables — enter as decimal numbers with a dot, matching the registration coordinates
• PV_Forecast_key — the assigned API key (secret variable), enter without spaces
• Period — the forecast loading period from the service; leave the default value of 6 unchanged. Do not edit the _savedValues variable

⚙️ Key features

• Hourly solar irradiance forecast and outdoor temperature for today, tomorrow and the day after
• Sunrise and sunset time and the forecast location address
• Input for QA Consumption Control — predicted photovoltaic output and surplus
• Manual forecast update outside the regular period
• Basic version of the PV Forecast service for one location free of charge
• Works together with other energy management applications — unified optimal control

🔌 Operating conditions

• Control unit: Fibaro HC3L or Fibaro HC3 (or Yubii Home / Yubii Home Pro) with internet access
• Location registration with the PV Forecast service and an assigned API key (basic version for one location free of charge)
• To use the forecast in control: QA Consumption Control and QA Inverter; loading and displaying the forecast on its own works even without them
• In QA Consumption Control, on the Installation card, check that it is included among the irradiance forecast sources

⚠️ Important information

• The application reads data from a third-party service — PV Forecast (pvforecast.cz); the transfer of values, their scope and update frequency depend on the terms of that service
• SHE does not guarantee the availability, completeness or accuracy of data provided by the third party; the customer registers and manages their own PV Forecast account
• The application's functionality and SHE support depend on the PV Forecast service; if it changes, is limited or discontinued, the application may stop working in whole or in part
• The basic (free) version of the service is limited to one registered location

🌍 Language sets

🇨🇿 Czech 🇬🇧 English