HESP series hybrid inverters (single-phase 4-12 kW and three-phase 8-12 kW)
SRNE 13 error code
Bypass overload protection (OverloadBypass): the load on the bypass/AC-input path exceeded its rating for too long.
Likely causes
- Site load above the bypass transfer capacity
- High inrush from pumps, compressors or welders
- Low grid voltage increasing current for the same load
- Output circuits combined onto one bypass feed
Checks to run, in order
- 1Clamp the AC input current during the trip
- 2Compare it with the inverter bypass/AC input current rating
- 3Check grid voltage at the same time
- 4List the loads that were running
Fixes
- Reduce the load, then restart the unit to restore output
- Move heavy loads to a managed schedule or another supply
- Correct the grid voltage problem if the supply is weak
When to escalate
If the bypass trips with a load well inside the rating, the distributor should check the bypass transfer circuit and 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 13 mean?
Bypass overload protection (OverloadBypass): the load on the bypass/AC-input path exceeded its rating for too long.
How do I fix SRNE 13?
Reduce the load, then restart the unit to restore output Move heavy loads to a managed schedule or another supply Correct the grid voltage problem if the supply is weak
When should I escalate SRNE 13?
If the bypass trips with a load well inside the rating, the distributor should check the bypass transfer circuit and current sensing.
Can I reset SRNE 13 myself?
Only after isolating the AC and DC sides and running the checks above. If SRNE 13 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show SRNE 13?
SRNE 13 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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