Solis Inverter Error Codes and Troubleshooting Guide (Error 1010)

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Key Takeaways

• Solis Error 1010 indicates grid overvoltage (Grid VOLT-PROT) caused by high utility grid voltage.
• Error 2000 signals isolation resistance failure (PV Iso-PROT) due to moisture or damaged cable insulation.
• NO-GRID alert signifies grid disconnection or AC breaker trip during power outages.
• Official repair costs in Pakistan range from Rs 7,000 to Rs 22,000 (July 2026) for control board repairs.

Introduction

Solis grid-tied and hybrid inverters manufactured by Ginlong Technologies are among the most popular choices for net-metered solar installations in Pakistan. Known for high efficiency and strong build quality, Solis inverters feature sophisticated self-diagnostic protection routines. When grid instability or installation issues occur, specific alarm codes display on the LCD screen. This comprehensive guide details Solis inverter error codes, focusing on Error 1010 grid overvoltage and Error 2000 isolation protection.

What do common Solis solar inverter error codes mean?

Solis inverter error codes follow a structured four-digit numerical classification that identifies grid-side faults, PV array issues, and internal hardware conditions. Recognizing these codes allows solar system owners to distinguish between external utility grid issues and internal inverter failures.

Error 1010 (Grid VOLT-PROT) indicates that utility grid AC voltage has exceeded the upper safety threshold programmed into the inverter firmware. This error is common in Pakistani residential areas served by LESCO, MEPCO, and K-Electric when neighborhood grid voltage rises above 253V AC. Error 1011 (Grid VOLT-UNDER) indicates utility grid voltage has dropped below allowable operating limits.

Error 2000 (PV Iso-PROT) signals low isolation resistance between the DC solar array wiring and earth ground. This safety lock activates when insulation resistance falls below 100 kOhms, protecting users from dangerous electric shock hazards. Error 1022 (NO-GRID) indicates that the inverter detects zero AC voltage from the utility power grid, which occurs naturally during load shedding hours.

How can you resolve Solis Error 1010 grid overvoltage?

Solis Error 1010 grid overvoltage occurs when local grid voltage exceeds 253V AC, causing the inverter to disconnect from the grid to protect internal components. In weak grid areas across Pakistan, high solar feed-in during peak afternoon hours can push local line voltage beyond upper limits.

To troubleshoot Error 1010, measure AC grid phase voltage at the inverter AC isolator terminals using a calibrated multimeter. If measured AC voltage consistently exceeds 250V AC, contact your local DISCO office to adjust transformer tap settings on your neighborhood distribution transformer.

If grid voltage remains within acceptable limits, consult an authorized Solis installer to inspect inverter grid standard parameter settings. Qualified technicians can adjust grid overvoltage protection limits slightly within NEPRA approved safety guidelines, extending upper protection trip levels up to 260V AC if grid code compliance permits.

What causes Solis Error 2000 PV isolation protection faults?

Solis Error 2000 PV isolation protection (PV Iso-PROT) trips when DC current leaks from solar panel conductors to the grounded metal mounting structure. Damp weather during monsoon rains in Punjab and Sindh frequently triggers Error 2000 as moisture penetrates damaged cable jackets or non-waterproof MC4 connector joints.

Physical damage to DC cable insulation caused by sharp mounting structure edges or rodent activity creates direct leakage paths to ground. Low-quality solar panels with degraded backsheet insulation can also exhibit low insulation resistance under high humidity conditions.

To resolve Error 2000, perform an insulation resistance test using a 1000V megohmmeter on each DC string with the array isolated from the inverter. Measure resistance between positive DC conductors and earth ground, then repeat between negative conductors and earth ground. Any string reading below 1 Megaohm requires immediate cable inspection and joint replacement.

How do you clear Solis NO-GRID and system protection alarms?

The Solis NO-GRID alarm (Error 1022) activates automatically whenever grid power fails or the main AC circuit breaker trips. While this is expected behavior during routine load shedding, persistent NO-GRID alarms when grid power is present indicate upstream electrical issues.

Inspect the AC main circuit breaker, residual current device, and AC isolator switch for tripped conditions or loose wiring connections. Verify that grid voltage is present across live and neutral AC input terminals. Loose neutral wiring connections at the distribution board frequently cause intermittent NO-GRID alarms.

For internal hardware protection alarms such as Error 3001 or Error 3002 (DSP fault or control communication error), perform a complete system power cycle. Switch off AC isolators, turn off DC isolators, wait five minutes for internal capacitors to discharge fully, and re-energize the unit. Persistent internal errors indicate control board hardware failure.

What are Solis inverter repair costs and service center options in Pakistan?

Solis inverters feature comprehensive warranty coverage in Pakistan through official distribution partners such as Solar Citizen and local representative centers. When out-of-warranty repairs are required, itemized costs vary based on circuit board damage.

Replacing a damaged AC filter board or surge suppressor module costs approximately Rs 7,000 to Rs 12,000 (July 2026). Main control board repair or digital signal processor board replacement costs between Rs 12,000 and Rs 22,000 (July 2026) for residential units rated between 5kW and 10kW.

Selecting official service centers in Lahore, Karachi, or Islamabad ensures that repair work uses authentic Ginlong replacement components and maintains original IP65 weather-proof enclosure ratings.

Frequently Asked Questions

What does Error 1010 mean on a Solis inverter?

Error 1010 indicates Grid Overvoltage (Grid VOLT-PROT), meaning utility grid voltage has exceeded the inverter's configured safety limit.

How do I fix Error 2000 on my Solis inverter?

Error 2000 is a PV Isolation Fault. Check DC cabling, MC4 connectors, and solar panel backsheets for moisture ingress or insulation damage to ground.

Why does my Solis inverter show NO-GRID?

NO-GRID appears during power outages or when the main AC circuit breaker is turned off, indicating zero incoming grid voltage.

References

• Ginlong Solis Official
• Solar Citizen Pakistan
• W11Stop Pakistan