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 59 error code
PV voltage exceeds the limit: the solar input voltage is above the inverter's 500 V DC maximum.
Likely causes
- Too many panels in series for the 500 V DC limit
- String open-circuit voltage rising in cold weather above the design figure
- Panel Voc from the datasheet not used in the string design
- PV surge or an incorrect array reconnection
Checks to run, in order
- 1Measure the string open-circuit voltage at the inverter DC input, ideally on a cold morning
- 2Compare it with the 500 V DC maximum and the panel datasheet Voc
- 3Count the panels per string and check the series/parallel arrangement
- 4Check whether panels were added or reconnected since commissioning
Fixes
- Remove panels from the string until Voc is safely below 500 V DC at the coldest expected temperature
- Reconfigure the array into more strings of fewer panels
- Recheck the string design before reconnecting
When to escalate
If the measured Voc is within 500 V DC and 59 still appears, the PV voltage sensing circuit is faulty — the distributor should inspect the unit.
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 59 mean?
PV voltage exceeds the limit: the solar input voltage is above the inverter's 500 V DC maximum.
How do I fix SMS Sunmate Solar 59?
Remove panels from the string until Voc is safely below 500 V DC at the coldest expected temperature Reconfigure the array into more strings of fewer panels Recheck the string design before reconnecting
When should I escalate SMS Sunmate Solar 59?
If the measured Voc is within 500 V DC and 59 still appears, the PV voltage sensing circuit is faulty — the distributor should inspect the unit.
Can I reset SMS Sunmate Solar 59 myself?
Only after isolating the AC and DC sides and running the checks above. If SMS Sunmate Solar 59 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 59?
SMS Sunmate Solar 59 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 03Battery 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.
- 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).
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