HESP series hybrid inverters (single-phase 4-12 kW and three-phase 8-12 kW)
SRNE 57 error code
Leakage current overload fault: system leakage current exceeded the limit, so the inverter disconnected.
Likely causes
- Insulation fault in load wiring or an appliance
- Moisture in outdoor circuits
- Missing or poor earthing
- Several small leakages adding up across circuits
Checks to run, in order
- 1Verify the earthing system and earth continuity
- 2Insulation-test the load circuits
- 3Isolate circuits one at a time to identify the leaking one
- 4Check outdoor sockets and appliances for moisture
Fixes
- Repair the insulation fault or remove the faulty appliance
- Restore proper earthing
- Dry out wet circuits before re-energising
When to escalate
A leakage trip that repeats on a dry, correctly earthed installation needs the distributor to check the residual-current sensing circuit.
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 57 mean?
Leakage current overload fault: system leakage current exceeded the limit, so the inverter disconnected.
How do I fix SRNE 57?
Repair the insulation fault or remove the faulty appliance Restore proper earthing Dry out wet circuits before re-energising
When should I escalate SRNE 57?
A leakage trip that repeats on a dry, correctly earthed installation needs the distributor to check the residual-current sensing circuit.
Can I reset SRNE 57 myself?
Only after isolating the AC and DC sides and running the checks above. If SRNE 57 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show SRNE 57?
SRNE 57 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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