- Solar and energy
- Solar inverter
102
Fronius inverter event 102
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
Fronius defines event 102 as: AC grid voltage is too high. The useful next discriminator is phase voltage, event time and connection-point condition. 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 102
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 102
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 102, 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
- 2
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 phase voltage, event time and connection-point condition; 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
- 3
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
- 102 Elaborazione
- 102 Procesando
- 102 Processing
- 102 Traitement
- 102 Verarbeitung
- cargador Wallbox 102
- caricatore Wallbox 102
- chargeur Wallbox 102
- code Wallbox 102
- codice Wallbox 102
- código Wallbox 102
- erreur Wallbox 102
- error Wallbox 102
- errore Wallbox 102
- événement Fronius 102
- événement SMA 102
- evento Fronius 102
- evento SMA 102
- Fronius Ereignis 102
- Fronius event 102
- Fronius inverter 102
- Fronius Symo / Eco 102
- Fronius Wechselrichter 102
- HTTP 102
- HTTP status 102
- inversor Fronius 102
- inversor SMA 102
- inverter Fronius 102
- inverter SMA 102
- onduleur Fronius 102
- onduleur SMA 102
- SMA Ereignis 102
- SMA event 102
- SMA inverter 102
- SMA Wechselrichter 102
- Sunny Tripower X 102
- Wallbox app code 102
- Wallbox charger 102
- Wallbox error 102
- Wallbox Fehler 102
- Wallbox Fehlercode 102
- Wallbox Ladegerät 102
What it means
Official meaning: AC grid voltage is too high. Decision boundary: capture phase voltage, event time and connection-point condition. 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 102: AC grid voltage is too high.
Evidence: Fronius Symo / Eco status diagnostics
- The observation that changes the next branchPossible
Capture phase voltage, event time and connection-point condition. 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 102 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
- 1
Fronius Symo / Eco status diagnostics
Fronius International GmbH · 2025 · official_doc
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