- Solar and energy
- Solar inverter
107
Fronius inverter event 107
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
Fronius defines event 107 as: No AC grid is detected. The useful next discriminator is the recorded grid state, all phase values and breaker state. Preserve the event before any reset.
Safety first
Stop and check this first
- Do not change grid-code, voltage or frequency protection settings without installer and grid-operator authorization. Do not measure live boards yourself.
Safe checks you can perform
- Preserve the exact event context
- Collect one safe discriminator
- Respect the electrical stop point
Leave these tasks to a qualified professional
- Do not attempt this professional task: Measured handoff for Fronius 107
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Measured handoff for Fronius 107
What they doA qualified electrician should log phase voltages, frequency and connection-point impedance under the same export condition, then compare them with the active grid code and utility limits.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
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Preserve the exact event context
No special tools
Procedure
Save event 107, timestamp, inverter model/serial, firmware, red-LED state, affected phase/string, power and weather before clearing anything.
Do not change grid-code, voltage or frequency protection settings without installer and grid-operator authorization. Do not measure live boards yourself.
Evidence: Fronius Symo / Eco status diagnostics
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Collect one safe discriminator
No special tools
Procedure
From the monitoring interface and a safe location, note whether other premises lost power and whether the event repeats at a particular export level or time. Record the recorded grid state, all phase values and breaker state; do not change multiple parameters or circuits at once.
Do not change grid-code, voltage or frequency protection settings without installer and grid-operator authorization. Do not measure live boards yourself.
Evidence: Fronius Symo / Eco status diagnostics
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Respect the electrical stop point
No special tools
Procedure
If supply to the site is abnormal, involve the grid operator; if only the inverter repeats the event, a qualified electrician must measure at the connection point.
Do not change grid-code, voltage or frequency protection settings without installer and grid-operator authorization. Do not measure live boards yourself.
Evidence: Fronius Symo / Eco status diagnostics
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Solar and energy
- Brand
- Fronius
- Product type
- Solar inverter
Known code variants
- cargador Wallbox 107
- caricatore Wallbox 107
- chargeur Wallbox 107
- code Wallbox 107
- codice Wallbox 107
- código Wallbox 107
- erreur Wallbox 107
- error Wallbox 107
- errore Wallbox 107
- événement Fronius 107
- evento Fronius 107
- Fronius Ereignis 107
- Fronius event 107
- Fronius inverter 107
- Fronius Symo / Eco 107
- Fronius Wechselrichter 107
- inversor Fronius 107
- inverter Fronius 107
- onduleur Fronius 107
- Wallbox app code 107
- Wallbox charger 107
- Wallbox error 107
- Wallbox Fehler 107
- Wallbox Fehlercode 107
- Wallbox Ladegerät 107
What it means
Official meaning: No AC grid is detected. Decision boundary: capture the recorded grid state, all phase values and breaker state. A qualified electrician should log phase voltages, frequency and connection-point impedance under the same export condition, then compare them with the active grid code and utility limits.
Warnings and stop conditions
- Mediumsource verified
Do not change grid-code, voltage or frequency protection settings without installer and grid-operator authorization. Do not measure live boards yourself.
Evidence: Fronius Symo / Eco status diagnostics
Symptoms and causes
Probable causes · in order
- What the Fronius event establishesConfirmed
The official Fronius Symo / Eco manual defines event 107: No AC grid is detected.
Evidence: Fronius Symo / Eco status diagnostics
- The observation that changes the next branchPossible
Capture the recorded grid state, all phase values and breaker state. If supply to the site is abnormal, involve the grid operator; if only the inverter repeats the event, a qualified electrician must measure at the connection point.
Evidence: Fronius Symo / Eco status diagnostics
Virtual technician
Does 107 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
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Fronius Symo / Eco status diagnostics
Fronius International GmbH · 2025 · official_doc
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