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Problem diagnosis · SolarEdge

SolarEdge red light — what it means and how to diagnose it

Your SolarEdge inverter is showing a red light on the LED panel and you're not sure what it means. Is it dangerous? Can you restart it? We walk through LED patterns, fault codes, and safe troubleshooting — including the critical difference between a grid fault and an arc fault.
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Red light on your SolarEdge?

Solid or flashing, we help you read the fault code and identify the cause. Share your SetApp alert or monitoring portal screenshot.

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Safety: If you see AFCI (arc fault) in SetApp, do NOT restart. Isolate DC and AC switches and contact an engineer.

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33 Customer reviews

Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.

Alison F. Cockerill · Jun 2026 Google

Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.

Mark Mayson · Jun 2026 Google

Called back within a day and gave good advice.

Rob and Sue Dempster · Jun 2026 Google

Ron was extremely helpful and tried his best to repair/reset our GivEnergy inverter remotely. In the event he was unsuccessful but he couldn’t have been more helpful. If you have problems with a GivEnergy system please contact him. Highly recommended

Neil Crichton · Jun 2026 Google

Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.

Steve M · Jun 2026 Google

A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.

Philip Davey · Jun 2026 Google

Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.

Alison F. Cockerill · Jun 2026 Google

Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.

Mark Mayson · Jun 2026 Google

Called back within a day and gave good advice.

Rob and Sue Dempster · Jun 2026 Google

Ron was extremely helpful and tried his best to repair/reset our GivEnergy inverter remotely. In the event he was unsuccessful but he couldn’t have been more helpful. If you have problems with a GivEnergy system please contact him. Highly recommended

Neil Crichton · Jun 2026 Google

Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.

Steve M · Jun 2026 Google

A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.

Philip Davey · Jun 2026 Google
⚠️

Safety: If SetApp shows "Arc Fault Detected" (AFCI), do NOT restart the system repeatedly. AFCI is a safety protection indicating a potential dangerous condition. Isolate the DC and AC switches and contact a qualified engineer immediately.

Diagnostics

5-step guide to SolarEdge red light diagnosis

Work through these steps in order. The fault code from SetApp or the monitoring portal is your key to understanding the exact issue.

1

Observe the LED pattern — solid or flashing?

Look at the red light on the inverter's LED panel. Is it:

Solid Red

The inverter has a persistent fault and has stopped producing. This requires investigation or intervention.

Flashing Red

The inverter has a transient fault and is attempting recovery. Often clears automatically in 5–10 minutes.

In both cases, immediately open SetApp or the monitoring portal to find the exact fault code — this will tell you the cause.

2

Check SetApp or monitoring portal for the fault code

Open SetApp (via Bluetooth) or the online monitoring portal (monitoring.solaredge.com). Look for the Alerts, Status, or Error Code section. Write down the exact code. Common red-light codes are:

G70–G99 = Grid voltage or frequency fault
P700, P701 = Arc fault detection (AFCI)
Isolation fault = DC isolation or grounding issue
AC overcurrent = Excessive AC current
P404, P401 = Optimiser communication or output issue

Note: If no fault code appears in SetApp but the LED is red, try closing and reopening the app, or refreshing the monitoring portal.

3

Identify which LED is red — DC, communication, or AC/grid?

SolarEdge inverters have three LEDs: DC (usually leftmost), Communication (middle), and AC/Grid (usually rightmost). Each turns red when that system has a fault. Look at the inverter panel and note which LED is red:

Red DC LED: DC power issue — DC isolator off, blown fuse, or wiring fault. Check DC input voltage in monitoring.
Red Comm LED: Communication or DC issue — optimiser fault, communication loss, or grounding issue. Check SetApp for P404, P700.
Red AC/Grid LED: Grid fault — voltage over/under limit, frequency issue, or isolation fault. Check monitoring for grid voltage and frequency readings.
4

For grid faults (flashing red, G-codes) — wait and monitor

If the monitoring portal shows a grid voltage or frequency code (G70–G99) and the red light is flashing, this is usually a brief grid quality issue. The inverter is designed to disconnect if grid voltage goes outside safe limits (typically 207–253V for single-phase UK) — this is a safety feature. Here's what to do:

1. Wait 5–10 minutes — The inverter will automatically retry connection once grid voltage normalises.
2. Check the monitoring portal — Does the grid voltage reading now show 230V (or your normal supply voltage)? Is the red light gone?
3. If it clears — The fault was transient and has self-resolved. No action needed.
4. If it persists — The grid voltage is consistently outside limits. This may indicate a local grid infrastructure issue or a problem with your inverter's grid connection. Contact your installer or DNO (Distribution Network Operator).

Do NOT restart the inverter repeatedly if you see a grid fault code — wait for it to recover naturally.

5

For AFCI faults (arc fault) — DO NOT restart — ISOLATE IMMEDIATELY

If SetApp or the portal shows "Arc Fault Detected" or P700/P701, this is a safety event, not an arbitrary trip. Arc fault detection (AFCI) means the inverter detected abnormal current patterns on the DC side — typically a damaged cable, corroded connector, or failed optimiser. Do not attempt to restart or reset the system.

1. Immediately switch off the DC isolator — This is the most important safety step.
2. Switch off the AC isolator — Isolate both sides of the system.
3. Contact a qualified solar engineer — Do not restart, do not investigate the DC wiring yourself.
4. Do not open the inverter enclosure — High voltage hazard. Let the engineer investigate.

AFCI faults require on-site investigation to identify the underlying wiring or component issue. Repeated resets without fixing the cause can lead to further damage or safety risks.

How SolarEdge LED status works

SolarEdge inverters use three LED indicators on the front panel, each representing a different system: DC power, internal communication, and AC grid connection. When operating normally, all three are green. A red light on any of these indicates a fault in that system. The monitoring portal or SetApp provides the specific fault code — the LED colour and pattern narrow the category, but the code tells you the exact problem.

The key distinction is between transient faults (flashing red) and persistent faults (solid red). Flashing red usually means the inverter is attempting recovery — most often from a brief grid quality dip. Solid red means the fault is persistent and the inverter has stopped producing. A solid red light that doesn't clear within 10–15 minutes requires investigation.

Arc Fault Circuit Interrupter (AFCI) is a critical safety feature. Unlike other fault codes, arc faults should never be ignored or reset repeatedly. AFCI detection means the inverter has identified abnormal current patterns consistent with an arc in the DC wiring — a serious electrical hazard. The system stops producing to prevent further damage. Investigation and repair by a qualified engineer is mandatory.

Back to

Return to the SolarEdge brand hub to explore other common faults and services.

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FAQ

SolarEdge red light questions

First, determine if the red light is solid or flashing. Solid = persistent fault, the inverter has stopped producing. Flashing = transient fault, inverter is attempting recovery. Immediately open SetApp or the monitoring portal to read the fault code. The code tells you the exact cause. If you see "Arc Fault" (AFCI), isolate the DC and AC switches immediately — do not restart.
It depends on the cause. A red light from a grid fault (over/under voltage) is safe — the inverter is protecting itself. A red light from an arc fault (AFCI detection) IS potentially dangerous — it indicates abnormal current patterns suggesting a possible arc in the DC wiring. Arc faults require immediate isolation and engineer investigation.
No. AFCI is a safety protection indicating a potential dangerous condition. Do not reset repeatedly without identifying the cause. Isolate the DC and AC switches immediately and contact a qualified engineer. Repeated resets without addressing the underlying issue can cause further damage and increase safety risks.
Solid red = the inverter has a persistent fault and has stopped producing. Flashing red = the inverter has detected a transient fault (usually a brief grid quality issue) and is attempting to recover automatically. Flashing red often clears on its own within 5–10 minutes when the condition normalises. Solid red usually requires intervention or investigation.
The remote diagnostic is free — send us the fault code from SetApp or a monitoring screenshot and we'll tell you what the red light means at no charge. A lot of red lights are grid-voltage events that clear themselves, or a settings issue we can sort remotely for a flat £75, with nothing to pay if we can't fix it remotely. The exception is an arc fault (AFCI) or an isolation fault — physical DC-side safety faults that need an on-site visit, quoted up front from £245. Full pricing →
Usually the same day for anything we can read remotely. Once we have the fault code we can tell you straight away whether it's a transient grid event that will clear on its own, a settings or grid-parameter fix we can do in a remote session, or a safety fault that needs isolating and an engineer. If it's an arc or isolation fault, leave the system isolated and we'll book the earliest on-site slot — don't keep resetting it.
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