HESP series hybrid inverters (single-phase 4-12 kW and three-phase 8-12 kW)
SRNE 10 error code
PV boost overcurrent detected by software (PvOCSw); the inverter limits PV input and may stop PV charging.
Likely causes
- PV array current above the inverter maximum input current
- Too many parallel strings on one MPPT
- Damaged or shorted PV cable or connector
- Reverse current from a faulty string
Checks to run, in order
- 1Measure the operating and short-circuit current of each string
- 2Compare the total with the inverter maximum PV input current
- 3Inspect DC cables, MC4 connectors and the combiner box
- 4Check each string's voltage to find a reverse-connected string
Fixes
- Reduce the number of parallel strings per MPPT
- Repair or replace damaged DC cabling and connectors
- Restart the inverter after correcting the array
When to escalate
If the array current is within rating but the fault persists, ask the distributor to check the boost stage current sensing.
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 SRNE 10 mean?
PV boost overcurrent detected by software (PvOCSw); the inverter limits PV input and may stop PV charging.
How do I fix SRNE 10?
Reduce the number of parallel strings per MPPT Repair or replace damaged DC cabling and connectors Restart the inverter after correcting the array
When should I escalate SRNE 10?
If the array current is within rating but the fault persists, ask the distributor to check the boost stage current sensing.
Can I reset SRNE 10 myself?
Only after isolating the AC and DC sides and running the checks above. If SRNE 10 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show SRNE 10?
SRNE 10 is documented for HESP series hybrid inverters (single-phase 4-12 kW and three-phase 8-12 kW). Confirm the code on your own unit's display or manual before ordering parts.
More SRNE error codes
- SRNE 01Battery undervoltage alarm: the battery voltage has fallen below the [Batt. Under volt. alarm] value under Battery Setup, and the alarm does not by itself stop the output.
- SRNE 02Battery discharge average current overcurrent, detected by software (BatOverCurrSw); the inverter limits or stops discharge.
- SRNE 03Battery not connected (BatOpen): the inverter cannot see a battery on the DC side and stops the output.
- SRNE 04Battery undervoltage stop-discharge (BatLowEod): the battery has reached the low-voltage cut-off and the inverter has stopped discharging.
- SRNE 05Battery overcurrent detected by hardware protection (BatOverCurrHw); the inverter shuts the output down.
- SRNE 06Charging overvoltage protection (BatOverVolt): battery voltage rose above the over-voltage cut-off and charging was stopped.
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.
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