Fronius Inverter Lights – What do they mean?

Fronius Snap Inverter (Older Generation)

The Fronius Snap Inverter features a front panel with several indicators and function keys. A diagram shows a unit with numbered labels: (1) pointing to the display screen, and (2), (3), (4) pointing to status LEDs. Below the display, numbered labels (5), (6), (7), (8) point to function keys.

Item Descriptions

Display (1)

For displaying values, settings, and menus.

Monitoring and Status LEDs

General Status LED (Red) (2)

Lights up if a status message is being displayed on the monitor.
Lights up if the process of feeding energy into the grid is interrupted.
Lights up during error handling (the inverter waits for an acknowledgement or for an error to be rectified).

Startup LED (Orange) (3)

Lights up if the inverter is in its automatic startup or self-test phase (as soon after sunrise as the solar modules are delivering sufficient power).
Lights up if the inverter has been switched to Standby mode in the Setup menu (feeding energy into the grid switched off manually).
Lights up if the inverter software is being updated.

Operating Status LED (Green) (4)

Lights up if the PV system is working correctly after the inverter's automatic startup phase.
Lights up all the time while energy is being fed into the grid.

Function Keys

(5) "Left/up" key: For navigating to the left and up.
(6) "Down/right" key: For navigating down and to the right.
(7) "Menu/Esc" key: For switching to the menu level; for quitting the Setup menu.
(8) "Enter" key: For confirming a selection.

Fronius Gen24 Inverter (New Generation)

The Fronius Gen24 Inverter is a compact, modern-looking unit. The front panel displays a central power button with integrated indicator lights that change color (green, blue, yellow, red) to show status. Adjacent to the power button is a Wi-Fi indicator light. There is also a touch-sensitive button, described as a 'hand symbol', used for Wi-Fi and phone connectivity.

Power Button

During the day: Lights should be green and blue. If green is on but blue is not, the system is working but not connected to Wi-Fi.
Solid green light: Indicates the inverter is working and producing power.
Flashing green light: Indicates the inverter is starting up (usually takes about two minutes).
Yellow light (during the day): Indicates a non-critical problem affecting solar production. Check inverter switches and monitoring for error codes, then contact the installer.
Yellow light (at night): Normal, as solar panels do not work without sun.
Solid red light: May indicate a critical error. Try turning the system off and on again. If the issue persists, contact the installer.

Wi-Fi Button

Solid blue light: Indicates connection to the internet.
Solid red light: Indicates lost connection to Wi-Fi.
Solid yellow light: Means never connected. Contact the installer for Wi-Fi connection instructions.

Touch Button

Reconnecting Wi-Fi: If the system was previously connected to Wi-Fi but dropped out, tap the middle button (hand symbol) twice. A green flashing light indicates an attempt to reconnect to home Wi-Fi. This does not guarantee reconnection; check the Solar.web monitoring app/platform after a few minutes for confirmation.
Connecting to Phone: Tapping the middle button ('hand symbol') once results in a blue flashing light, indicating an attempt to connect to your phone. Your phone must be near the inverter for this to work. If successful, your phone can be used as the inverter screen, but connection is not guaranteed.
Resetting: Performing a reset on the inverter might automatically reconnect it to Wi-Fi if it was previously connected.

	Fronius Backup Power Solution: GEN24 Plus, Components, and Energy Storage Discover the Fronius Backup Power Solution, featuring the GEN24 and GEN24 Plus inverters, compatible batteries, and smart meters for reliable household energy security. Learn about system configurations, advantages, and digital tools for managing your PV system.
	Fronius Symo GEN24 5.0 2MPPT Inverter - Product Information Detailed product information for the Fronius Symo GEN24 5.0 2MPPT inverter, including technical specifications, features, and compatible accessories. This inverter offers 5kW AC power, 7.5kW DC input, dual MPPT tracking, and integrated WLAN/LAN connectivity.
	Fronius Inverter Setup Guide: Connecting to Energy Manager A comprehensive guide detailing the steps to prepare and install a Fronius inverter for seamless integration with an Energy Manager, covering network configuration, Wi-Fi and LAN connections, and system monitoring setup.
	Fronius Symo GEN24 Quick Start Guide Quick start guide for the Fronius Symo GEN24 inverter, covering installation, connection, and commissioning. Includes technical specifications and safety warnings.
	Fronius Primo GEN24 / GEN24 Plus: Technical Data and Product Overview Detailed technical specifications, product advantages, and performance data for the Fronius Primo GEN24 and GEN24 Plus hybrid solar inverters, covering models from 3.0 to 6.0 kW.
	FRONIUS Symo GEN24 3.0 2MPPT, WLAN, LAN, Webserver Product Information Technical specifications and features of the FRONIUS Symo GEN24 3.0 inverter, including MPP tracking, connectivity, energy management, battery compatibility, and physical dimensions.
	Fronius Energy Package Operating Instructions Comprehensive operating instructions for the Fronius Energy Package, including the Fronius Symo Hybrid and Fronius Solar Battery. This guide covers general information, safety rules, various operating modes, troubleshooting, and technical data.
	Fronius Symo GEN24 Operating Instructions Comprehensive operating instructions for the Fronius Symo GEN24 series, covering installation, operation, safety, and technical specifications for models 6.0, 6.0 Plus, 8.0, 8.0 Plus, 10.0, and 10.0 Plus.