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.
SolarEdge Inverter 8X19–8X1B AC Voltage Too High on Lines 1–3
SolarEdge codes 8X19, 8X1A, and 8X1B mean "AC Voltage Too High" on line 1, line 2, and line 3 respectively of a three-phase system. The inverter measured the grid voltage above its permitted limit and disconnected to protect itself. This is almost always a grid-side event — utility voltage running hot, often around midday when neighborhood solar exports push local voltage up — not a fault inside your inverter. The system reconnects automatically once voltage returns to the allowed range.
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
On a three-phase SolarEdge inverter, each grid phase gets its own watchdog. SolarEdge's official troubleshooting addendum (MAN-01-00332-1.1) lists codes 8X19, 8X1A, and 8X1B as "AC Voltage Too High (Line 1/2/3)". When any phase rises past the limit set by your country's grid code, the inverter must disconnect — that is a legal safety requirement, not a malfunction. The display or monitoring portal will tell you which line tripped, which matters because the cause is usually local to that phase's wiring or load balance.
The classic trigger is midday voltage rise. In a street full of solar, every system exporting at once pushes the local grid voltage upward, and the house farthest from the transformer sees the highest voltage. If your 8X19-series faults cluster between roughly 10am and 3pm on sunny days and the system recovers by evening, you are almost certainly looking at neighborhood voltage rise rather than anything wrong with your equipment. A fault that appears at night or on heavily overcast days points more toward a utility supply issue or a wiring problem.
SolarEdge's own troubleshooting steps for these codes are: check the AC connection to the inverter, verify the inverter is set to the correct country (the country setting defines the legal voltage limits), and check with the grid operator whether a large surge source or irregular load exists near the site. Note the distinction from the neighboring code family 8X1F/8X20/8X21, which is the sustained grid-overvoltage trip, and from single-phase code 55 (high grid voltage). Yours is the transient surge variant — same family of cause, shorter fuse.
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
- Midday voltage rise from many nearby solar systems exporting at once, especially far from the transformer.
- Utility supply voltage running near the top of its tolerance band on your street or phase.
- Undersized AC cable between the inverter and the grid connection point, adding voltage rise under export.
- A loose or corroded AC connection at the inverter, isolator, or switchboard raising local impedance.
- The inverter's country/grid-code setting not matching your actual location, applying the wrong limits.
- A large nearby load switching (industrial equipment, large motors) causing voltage swings on one phase.
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 installer if 8X19-series faults occur daily, happen at night or in dull weather, or only ever affect one line (which can indicate a wiring or connection issue on that phase). The installer can verify AC cable sizing, check and re-torque connections, confirm the country setting, and — with local authority permission — adjust grid protection values. Never open the inverter or work on AC wiring yourself.
Frequently asked questions
Which line is which — 8X19, 8X1A, or 8X1B?
8X19 is line 1, 8X1A is line 2, and 8X1B is line 3 on a three-phase inverter. Single-phase SolarEdge inverters report this family as error 14 / 2xE instead.
Will the system restart by itself?
Yes. Once the measured voltage falls back within the permitted range, the inverter runs its reconnection checks and resumes feeding in. No reset is needed.
My inverter trips every sunny midday but works mornings and evenings. Is it broken?
Probably not — that is the textbook signature of local grid voltage rise from neighborhood solar exports. It is a grid-code protection doing its job. Log the pattern and raise it with your installer, who can take it to the grid operator.
Can I raise the voltage limit myself to stop the tripping?
No. Voltage trip limits are set by your country's grid code and can only be changed by qualified personnel with the grid operator's permission. Changing them yourself can breach regulations and void warranties.
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 — SolarEdge "Troubleshooting SolarEdge Systems" Addendum MAN-01-00332-1.1 (official SolarEdge documentation) — error table: 8x19/8x1A/8x1B (three-phase) = "AC Voltage Too High (Line 1/2/3)", described as an AC voltage surge with troubleshooting steps (check AC connection, verify country setting, consult grid operator). Note: knowledge-center.solaredge.com is bot-blocked, so the official downloadable addendum was used instead.