3xA7 on a SolarEdge HD-Wave single-phase inverter: Country mismatch: Country mismatch - select the country
Short answer
On a SolarEdge inverter, 3xA7 means: Country mismatch: Country mismatch - select the country. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Country mismatch: Country mismatch - select the country.
Part involved: Country / grid-code setting.
Likely causes:
- Country setting mismatch between boards.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: installer sets the country (UK G98/G99) via SetApp/display.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Contact the installer - common after a board swap or firmware update.
- If the code persists, contact the installer. SolarEdge's list says 'OFF/ON to reconnect' for some codes - that means the inverter's own ON/OFF switch; only use it if your installer has shown you how. Never open the inverter or touch DC cables/connectors.
What the engineer will check
- Select correct UK country/grid code.
- Verify G98/G99 protection settings against the DNO connection agreement.
Who to ask for: PV installer.
Certification: Electrician competent in grid-connected PV (BS 7671 Section 712; IET Code of Practice for Grid-connected Solar PV), ideally the original MCS-certified PV installer; brand-approved/trained installer to keep manufacturer warranty.
What you might notice
Sources
- User Guide: SolarEdge Inverters Error Codes and Troubleshooting, Version 1.1 (January 2026) ↗ · 1.1 · page PDF p.6 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026