Warning What does this mean?
Your system is down or running degraded, but this is not an immediate safety danger. Work through the safe steps below.
Sungrow Inverter Error Code 014 — 10-Minute Grid Overvoltage Explained
Code 014 means the 10-minute average voltage from your electricity grid stayed above the allowed limit, so your Sungrow inverter shut itself down to comply with grid rules. It is not an inverter fault — it means your grid voltage is running high. The inverter reconnects on its own once the voltage returns to normal.
What should I do first?
Two quick questions — we'll point you to the right starting point.
Is this code still showing on your inverter's display?
Is your system producing power right now?
What this code means
Code 014 on your Sungrow inverter means the 10-minute rolling average of your grid voltage has exceeded the permitted limit, so the inverter has stopped feeding power into the grid. This is a protection function required by grid standards, not a sign that your inverter is broken. The "10-minute" part matters: the inverter watches a sustained average rather than reacting to brief spikes, which are handled by the faster overvoltage codes (002, 003, and 015).
In practice, 014 is the classic symptom of a persistently hot grid. The most common scenario is a sunny midday in a street full of rooftop solar: every system exporting at once pushes the local voltage up, and once the 10-minute average crosses the protection value, inverters across the area start dropping off one by one. Your inverter will reconnect automatically once the average falls back into range — there is nothing to reset.
The other common trigger sits in the inverter's own settings. The overvoltage protection values come from the country data set programmed at commissioning, and Sungrow's manual lists the very first troubleshooting step for 014 as checking that the selected country code matches the country the inverter is actually installed in. A wrong country setting applies the wrong thresholds, and 014 can appear even on a perfectly healthy grid. Only your installer should verify or change this setting.
It helps to understand what the inverter is actually measuring. The 10-minute average is a rolling window: the inverter continuously averages the grid voltage over the preceding 10 minutes. A kettle switching on next door or a brief cloud-edge spike will not trip it — only a sustained high average will. That is why 014 behaves differently from the instantaneous overvoltage codes, and why it so often appears as a pattern (same time most sunny days) rather than a one-off.
Your monitoring app is your best witness. In Sungrow's iSolarCloud app or on the inverter display, 014 is logged with a timestamp. If you pull up the day's power curve, you will usually see generation climbing through the morning, then a sharp drop to zero exactly when 014 hits, then recovery later as voltage eases. Showing that curve to your installer saves a lot of diagnostic time: a 014 that always lands at peak export points squarely at voltage rise, while a 014 at odd hours points at settings or a genuine network problem.
What is this downtime costing you?
Rough estimate while your system isn't producing. Adjust the numbers to match your setup.
≈ – kWh of lost production per day.
Estimate only — assumes ~80% real-world output vs. nameplate. Actual losses depend on weather, shading, panel direction, and your tariff.
Common causes
- Grid voltage running high in your area, especially around midday when rooftop solar exports peak
- Wrong country or region setting in the inverter, applying incorrect overvoltage protection values
- 10-minute overvoltage protection threshold set incorrectly at commissioning
- Undersized or overly long AC cable between the inverter and your meter, causing voltage rise at the inverter terminals
- Loose or deteriorating AC connections affecting voltage measurement
- A genuine utility network issue with voltage regulation in your street
- High grid impedance in weak or rural networks, which amplifies voltage rise from your own exports
- Your own inverter's export pushing up the local voltage on a high-impedance connection
- Several single-phase solar systems clustered on the same phase, unbalancing local voltage
- Aging or undersized utility transformer serving your street
Safe steps to try
Work top to bottom, ticking off each step as you complete it. 0 of 5 done.
Is your inverter still under warranty?
Before paying for a repair, check — your installer may fix this free.
Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.
When to call an electrician
Call your solar installer if 014 appears repeatedly — particularly on clear middays — or if the inverter stays offline for long stretches. The installer can confirm the country setting, measure the actual grid voltage at your connection point, and check AC cable sizing and connections. If the grid itself is running out of range, the installer or your retailer escalates it to the network operator: Sungrow's official end-user guidance for grid fault codes states plainly that customers should not adjust inverter settings but should report the problem to the network operator or retailer for investigation. Protection values and country data may only be changed by qualified personnel, and only with grid-operator approval where required.
Frequently asked questions
Is code 014 dangerous?
No. Code 014 is the inverter obeying grid rules — disconnecting when the grid voltage stays too high. There is no danger to you or your home; the protection exists to keep the grid stable, and the inverter simply waits it out.
Will code 014 clear by itself?
Yes. Once the 10-minute average voltage returns to the permitted range, the inverter automatically resumes feeding power. But if it keeps recurring, the underlying cause — high grid voltage or a wrong country setting — still needs professional attention.
Can I fix 014 by adjusting the inverter's voltage settings?
You should not try. The overvoltage thresholds are part of the inverter's grid-compliance configuration, and changing them without authorization can breach your grid connection agreement. Your installer can review them with the proper access level.
Why does 014 mostly happen around midday?
Midday is when solar exports peak, and all that exported power pushes local grid voltage upward. If your street's grid already runs near the top of its allowed range, the extra midday export tips the 10-minute average over the limit.
My installer mentioned 'voltage rise.' What does that mean?
When your inverter exports power, it must push slightly against the grid voltage, so the voltage at your inverter terminals sits a little higher than at the street. The longer or thinner your AC cable — and the weaker the local grid — the bigger that rise. Add high grid voltage on top, and the 10-minute average crosses the limit.
Need a professional?
This fault may need professional diagnosis. Contact a qualified solar electrician in your area.
Sources: meaning and troubleshooting verified against the manufacturer's documentation — Sungrow Australia 'Grid Error Code Explanation for End Users' (service.sungrowpower.com.au); Sungrow Academy EMEA fault-code article 011-020 (academy.sungrow-emea.com); SG2K-S to SG8K-D user manual fault table (014 = 10-minute grid overvoltage).