Anern AN-SCI-EVO OEM series (SMS 2 kVA/12 V, 4.2 kW/24 V, 10.2 kVA/48 V hybrid units)
SMS Sunmate Solar 03 error code
Battery over-voltage: the battery bank is charged above the inverter's high-voltage limit. The same number is also used as a warning (beep once per second) when the battery is overcharged.
Likely causes
- Battery type or charge voltage setting not matched to the installed bank
- Too much PV or charger current for the size of the bank
- Battery count or bank voltage different from the specification
- External charger or BMS pushing the bank too high
Checks to run, in order
- 1Measure the battery voltage at the terminals with a multimeter and compare it with the display
- 2Check that the battery count and nominal voltage match the model specification
- 3Review the battery type and charge voltage settings
- 4Check whether an external charger or BMS is raising the voltage
Fixes
- Correct the battery type and charge voltage settings
- Disconnect any external charger until the voltage falls back into range
- Stop charging and have an overcharged bank inspected before reuse
When to escalate
The manual directs an overcharged battery to the repair centre: stop using the bank and have the distributor check the charger and BMS.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does SMS Sunmate Solar 03 mean?
Battery over-voltage: the battery bank is charged above the inverter's high-voltage limit. The same number is also used as a warning (beep once per second) when the battery is overcharged.
How do I fix SMS Sunmate Solar 03?
Correct the battery type and charge voltage settings Disconnect any external charger until the voltage falls back into range Stop charging and have an overcharged bank inspected before reuse
When should I escalate SMS Sunmate Solar 03?
The manual directs an overcharged battery to the repair centre: stop using the bank and have the distributor check the charger and BMS.
Can I reset SMS Sunmate Solar 03 myself?
Only after isolating the AC and DC sides and running the checks above. If SMS Sunmate Solar 03 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show SMS Sunmate Solar 03?
SMS Sunmate Solar 03 is documented for Anern AN-SCI-EVO OEM series (SMS 2 kVA/12 V, 4.2 kW/24 V, 10.2 kVA/48 V hybrid units). Confirm the code on your own unit's display or manual before ordering parts.
More SMS Sunmate Solar error codes
- SMS Sunmate Solar 01Fan failure: the cooling fan is blocked or not turning. The same code appears as a warning when the fan is blocked while the inverter is running.
- SMS Sunmate Solar 02Over-temperature: internal component temperature above 100 °C, or converter temperature above 120 °C.
- SMS Sunmate Solar 04Battery under-voltage: the bank has discharged below the inverter's low-voltage cutoff. The same number is also used as a low-battery warning (beep once per second).
- SMS Sunmate Solar 05Output short circuit: a short is detected on the AC output.
- SMS Sunmate Solar 06Abnormal output voltage: the inverter output is above 260 V AC (the manual groups 06 and 58 as output voltage outside the 190–260 V AC band).
- SMS Sunmate Solar 07Overload timeout: the inverter has been loaded above 110% of its rating and the overload timer has expired, so the output is switched off.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
Back to troubleshooting