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.
GoodWe Inverter Error 2 — Is the EEPROM Chip Failing?
Error 2 on a GoodWe inverter means the internal EEPROM memory chip cannot be read from or written to — the small chip that stores the inverter's settings and operating parameters has failed its self-check. This is an internal hardware fault, not a grid or wiring problem, and there is nothing you can adjust to fix it. You may try one restart using the inverter's external DC switch; if Error 2 comes back, the unit needs professional service — contact your installer or GoodWe's local service office. Do not open the inverter.
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
Deep inside every GoodWe inverter sits an EEPROM — electrically erasable programmable read-only memory — a tiny non-volatile chip whose job is to remember things: grid-code settings, protection thresholds, calibration data, communication parameters. It has to survive a decade or more of heat cycles on a rooftop or a garage wall. Error 2, "EEPROM R/W Failure," is the inverter announcing that this chip has stopped cooperating: read and write operations to it are failing, so the control board can no longer trust the settings it is supposed to be running on.
GoodWe's manuals describe it plainly across several series: "EEPROM cannot be read or written," "Eeprom device failure," "Memory chip failure." Because the fault is inside the sealed electronics, the manuals offer no user-side remedy beyond a restart — the entire troubleshooting path routes to the local service office. That is the honest shape of this error: it is a component-level failure, and the fix is board-level service or replacement, decided by people with the right equipment. Your role is limited to confirming the error is real (not a one-time glitch) and getting the right information to the service team.
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
- Age-related degradation of the EEPROM chip itself — flash memory cells wear out over years of write cycles and heat exposure.
- Corruption of the stored data after a power surge, lightning-induced transient, or an interrupted firmware update.
- A failing solder joint or board-level connection to the memory chip, aggravated by years of thermal cycling.
- A broader control-board fault that manifests first as memory errors before other symptoms appear.
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
If Error 2 reappears after the restart, stop troubleshooting and contact your installer or GoodWe's local service office — this is the outcome GoodWe's manuals prescribe ("If the problem still exists, contact local service office for help"). This is a hardware fault that requires service-level diagnosis: memory-chip replacement, control-board replacement, or unit replacement under warranty. Mention when the error first appeared and whether the restart changed anything. If the inverter is still within its warranty period, do not let anyone other than authorized service open the unit, or you risk voiding the warranty.
Frequently asked questions
Will I lose my inverter's settings?
Possibly. The EEPROM holds configuration data, so a failing chip can mean settings are corrupted or revert to defaults. Note down any custom settings (grid code, export limits) before the service visit so the technician can restore them.
Can a firmware update fix Error 2?
Very unlikely. This is a hardware-level memory failure, not a software bug. Only a service technician with board-level access can determine whether the chip or the whole control board needs replacing.
Is my solar generation data lost?
Generation totals stored in the inverter's memory may be affected, but your monitoring portal or meter usually holds an independent record. Check your app or SEMS portal history — the energy went somewhere even if the inverter forgot it.
How urgent is Error 2?
The inverter cannot operate reliably with failed memory, so the system is effectively down until serviced. It is not a safety emergency — there is no shock or fire risk implied by this code — but every day of downtime is lost generation, so book the service call promptly.
Could a power surge have caused this?
Yes, surges and lightning-induced transients are a known cause of memory corruption in electronics. If your area had storms around the time the error appeared, mention it to the service team — and ask about surge protection for the replacement.
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 — GoodWe SS Series User Manual, Table 4.4-2 'Description of Error Code' — Code 02 'EEPROM cannot be read or written'; error message table 'EEPROM R/W Failure: Memory chip failure' (goodwe.com). Restart procedure per GoodWe DNS Series User Manual, Section 9 Maintenance troubleshooting.