IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — inverter warning code
Itel Energy 04 error code
Grid voltage is above the upper limit of the inverter's grid window; warning only, with no buzzer alarm.
Likely causes
- Grid voltage above the inverter's configured upper limit
- Utility transformer tap set too high, or heavy generation on the feeder
- Loose or high-resistance neutral connection distorting the measured voltage
Checks to run, in order
- 1Measure the AC input voltage with a true-RMS meter and compare it with the LCD reading
- 2Repeat the measurement at different times of day to see whether the over-voltage is sustained
- 3Inspect the AC input terminals and the neutral/PE connections
Fixes
- Wait for the grid voltage to return to the normal window
- Ask the utility to correct the transformer tap or feeder voltage
- Only widen the grid upper limit within the inverter's permitted settings range
When to escalate
If the measured grid voltage is inside the standard window but code 04 persists, ask the distributor to check the inverter's voltage sampling and grid settings.
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 Itel Energy 04 mean?
Grid voltage is above the upper limit of the inverter's grid window; warning only, with no buzzer alarm.
How do I fix Itel Energy 04?
Wait for the grid voltage to return to the normal window Ask the utility to correct the transformer tap or feeder voltage Only widen the grid upper limit within the inverter's permitted settings range
When should I escalate Itel Energy 04?
If the measured grid voltage is inside the standard window but code 04 persists, ask the distributor to check the inverter's voltage sampling and grid settings.
Can I reset Itel Energy 04 myself?
Only after isolating the AC and DC sides and running the checks above. If Itel Energy 04 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Itel Energy 04?
Itel Energy 04 is documented for IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — inverter warning code. Confirm the code on your own unit's display or manual before ordering parts.
More Itel Energy error codes
- Itel Energy 01Display code 01 covers two events: as a warning it signals output overload (flashing fault LED, two beeps per second); as a fault it signals DC bus over-voltage (solid fault LED, output switched off).
- Itel Energy 02Display code 02 covers two events: as a warning it signals the upper cooling fan is locked (three beeps); as a fault it signals DC bus under-voltage (solid fault LED, output switched off).
- Itel Energy 03Display code 03 covers two events: as a warning it signals the lower cooling fan is locked (three beeps); as a fault it signals that the DC bus soft-start sequence failed (solid fault LED).
- Itel Energy 05In a parallel system the AC outputs of the units are not connected together, or a unit is running on a different phase.
- Itel Energy 06Remote shutdown is enabled, typically from the monitoring app over Wi-Fi, so the inverter is being held off remotely.
- Itel Energy 07The load on the inverter's second AC output exceeds that output's rating; warning only, with no buzzer alarm.
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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