HESP series hybrid inverters (single-phase 4-12 kW and three-phase 8-12 kW)
SRNE 05 error code
Battery overcurrent detected by hardware protection (BatOverCurrHw); the inverter shuts the output down.
Likely causes
- Short circuit or reverse polarity in the battery wiring
- Very large inrush current from the load
- Battery bank internal short
- Inverter DC-side hardware fault
Checks to run, in order
- 1Isolate the battery and inspect DC cables for short or reverse polarity
- 2Measure battery voltage and check the fuse
- 3Check for a burnt smell or discoloration at the DC terminals
- 4Clamp the discharge current if the unit will run
Fixes
- Clear the short or polarity fault and replace the fuse
- Reduce the load and restart
- Do not keep resetting a hardware overcurrent trip
When to escalate
A hardware battery overcurrent trip with correct polarity and no short means the DC board or battery must be checked by the distributor.
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 05 mean?
Battery overcurrent detected by hardware protection (BatOverCurrHw); the inverter shuts the output down.
How do I fix SRNE 05?
Clear the short or polarity fault and replace the fuse Reduce the load and restart Do not keep resetting a hardware overcurrent trip
When should I escalate SRNE 05?
A hardware battery overcurrent trip with correct polarity and no short means the DC board or battery must be checked by the distributor.
Can I reset SRNE 05 myself?
Only after isolating the AC and DC sides and running the checks above. If SRNE 05 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show SRNE 05?
SRNE 05 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 06Charging overvoltage protection (BatOverVolt): battery voltage rose above the over-voltage cut-off and charging was stopped.
- SRNE 07Internal DC bus overvoltage detected by hardware protection (BusOverVoltHw); the inverter stops the output.
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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