- Solar and energy
- Solar inverter
Grid Overvoltage
GoodWe Grid Overvoltage on solar inverter: grid voltage too high
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
GoodWe's Grid Overvoltage fault means the grid voltage is above the permitted range and the inverter stops feeding in. If it is occasional it recovers on its own; if it happens often, log it and ask the installer to measure the grid voltage.
Safety first
Stop and check this first
- Disabling or relaxing overvoltage protection without the power company's permission can breach the grid standard; GoodWe requires that consent first.
Safe checks you can perform
- Note whether the fault is occasional or frequent
- Ask neighbours who have solar panels
- Do not change protection thresholds yourself
Leave these tasks to a qualified professional
- Do not attempt this professional task: Voltage measurement at the connection point
- Do not attempt this professional task: AC breaker and output wiring inspection
- Do not attempt this professional task: Threshold change only with consent
What a technician must be able to justify
Technician visit
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.
Voltage measurement at the connection point
What they doThe installer measures the grid voltage at the GoodWe inverter's connection point during the hours when the fault appears.
They must show youthe grid voltage logged through the day and the country standard set on the inverter.
In writingthe maximum values measured, the permitted range and whether the power company was informed.
AC breaker and output wiring inspection
What they doThe electrician checks the tightness and condition of the AC breaker and the inverter's output cables.
They must show youthe condition of terminals and cables and the voltage measured at both ends of the output cable.
In writingwhich connection was remade and the voltages before and after.
Threshold change only with consent
What they doIf the grid voltage is within range, the installer may adjust the overvoltage threshold or HVRT after obtaining the power company's permission.
They must show youthe power company's consent and the inverter firmware version.
In writingthe previous thresholds, the new ones and the consent reference.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Note whether the fault is occasional or frequent
- Who:
- you, from the monitoring app and the inverter lights.
- How:
- record each time Grid Overvoltage appears, the time and whether the red light stays on; watch whether it happens mostly around midday with high production.
- Result that matters:
- knowing whether it is a temporary grid anomaly, which GoodWe treats as normal, or a repeated problem.
- If it shows up now and then and the inverter reconnects by itself:
- GoodWe treats this as a temporary anomaly; just keep an eye on it.
- If it repeats daily or keeps the inverter offline for long periods:
- ask the installer to measure the grid voltage.
- Evidence to keep:
- a list of fault dates and times and app screenshots.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
Ask neighbours who have solar panels
- Who:
- you, talking to neighbours with PV systems on the same street.
- How:
- find out whether their inverters also disconnect at the same time; several systems affected together point to the local grid voltage.
- Result that matters:
- providing evidence that the origin lies in the distribution grid, as GoodWe allows for.
- If other neighbours see the same:
- tell the installer, because GoodWe says to contact the local power company if the voltage is out of range.
- If only your inverter is affected:
- a problem with your own connection or configuration is more likely.
- Evidence to keep:
- the streets affected and matching times.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
Do not change protection thresholds yourself
- Who:
- you, staying out of the advanced settings in the app.
- How:
- the manual only allows the overvoltage threshold or HVRT to be changed, or the protection disabled, after the local power company has consented; leave this to the installer.
- Result that matters:
- the inverter keeping to your country's grid standard.
- If the installer proposes a setting change:
- ask to see the power company's consent.
- If nobody has obtained that consent:
- the thresholds should stay as they are.
- Evidence to keep:
- a screenshot of the current grid settings before any change.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Solar and energy
- Brand
- GoodWe
- Product type
- Solar inverter
Known code variants
- GoodWe Grid Overvoltage
- GoodWe Grid Overvoltage fault
- GoodWe grid voltage too high
- GoodWe HVRT overvoltage
- GoodWe inverter trips high voltage
- GoodWe sobretensión de red
- GoodWe tensión de red alta
- GoodWe XS G3 Grid Overvoltage
- GoodWe XS Grid Overvoltage
- inversor GoodWe se desconecta por tensión alta
What it means
In the GoodWe XS Series G3 user manual (V1.9-2026-06-29), Grid Overvoltage appears when the grid voltage exceeds the permissible range or the high voltage lasts longer than the HVRT requirement allows. GoodWe says that if it happens occasionally the utility grid may be temporarily abnormal and the inverter recovers automatically. The fault never proves on its own that the inverter is faulty; it can also come from the grid or the AC connections. Other models or firmware may differ.
Warnings and stop conditions
- Mediumsource verified
Disabling or relaxing overvoltage protection without the power company's permission can breach the grid standard; GoodWe requires that consent first.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
Symptoms and causes
Probable causes · in order
- Grid voltage above the permitted rangeCommon
GoodWe attributes the fault to the grid voltage exceeding the range allowed by the configured grid standard, which usually depends on the distribution network.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
- High voltage lasting longer than HVRT allowsPossible
The manual adds that it also trips when high voltage persists for longer than the HVRT requirement of the grid standard permits.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
- AC breaker or output cables poorly connectedPossible
If the problem persists, GoodWe asks for the AC breaker and the output cables to be checked for secure and correct connection.
Evidence: User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
Virtual technician
Does Grid Overvoltage 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
User Manual V1.9-2026-06-29 Grid-Tied PV Inverter XS Series (0.7-3.3kW) G3
GoodWe Technologies Co., Ltd. · 2026 · manual
- 2
Manual del usuario V1.8-2026-01-28 Inversor fotovoltaico conectado a la red
GoodWe Technologies Co., Ltd. · 2026 · manual
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