Photovoltaic systems play a crucial role in modern energy management. The Fronius Symo inverter offers excellent connectivity for Smart Home environments. Thanks to its open, local API, data extraction is straightforward and does not require constant cloud connectivity. This local approach ensures high reliability and fast response times for various automations.<\/p>\n\n\n\n
To monitor the status of the PV installation, a custom PHP script running on a local server can be utilized. This script queries the inverter’s API endpoint at The data is fetched periodically, such as every 5 minutes, keeping the information up to date. To handle periods when the inverter is offline\u2014like during the night when solar production drops to zero and the Visually, the script features a dynamic background color that changes based on the current power generation. By using a custom gradient function, the background transitions smoothly through different colors (e.g., from white to orange to red) depending on the [http:\/\/192.168.XXX.XXX\/solar_api\/v1\/GetInverterRealtimeData.cgi?Scope=Device&DeviceId=1&DataCollection=CommonInverterData]<\/code>. The JSON response is decoded to extract key metrics, specifically the current power output (PAC<\/code>) and the total energy generated for the day (DAY_ENERGY<\/code>).<\/p>\n\n\n\nDAY_ENERGY<\/code> value returns as null or false\u2014a fallback mechanism is implemented<\/sup>. In such cases, the script reads the last known values from a local 1.dat<\/code> file, ensuring the display remains intact without errors<\/sup>.<\/p>\n\n\n\nPAC<\/code> value. This lightweight, self-refreshing webpage can then be displayed directly on a smartphone home screen using an application like “Widgetify”, creating a highly convenient and personalized monitoring widget:<\/p>\n\n\n\n