Our warranty covers manufacturing defects and damages caused directly by company operations. However, certain types of damage are not covered under our warranty.

Excluded Damages:

• Natural Disasters: Earthquakes, floods, hurricanes, and other force majeure events.

• Theft or Loss: Whether due to negligence or other circumstances.

• Water Damage: Including submersion, moisture exposure, or any water-related incidents.

• Fire Damage:  Regardless of the cause.

Please review the warranty terms and conditions included with your product for full details on coverage and exclusions. If you have any questions, feel free to contact our Customer Support Team on 8001 for assistance.

1. Check the inverter to see if there is a red blinking light, this means that there is an error experienced by the inverter.

2. The screen may be off, this means the inverter is in Sleep mode but not off

3. Press the "Ent" button once and wait for the screen to go on

4. Check the fault code displayed and refer to the user manual for troubleshooting.

5. if the there is no user manual contact the Sun King Inverter Customer Care team on +260 971 243 303

1. Ensure the inverter is powered ON.

2. Locate the power button and turn the inverter OFF.

3. Wait 10–15 seconds.

4. Turn the inverter ON again.

5. When prompted, enter the reboot/reset code 531135

6. Allow the inverter to complete the reboot process.

1. Turn off the PV breaker and the AC breaker in the Sun King protection box.

2. Turn off the inverter by flipping the switch on the right underside part of the inverter.

3. Wait for 1 minute until the inverter is completely off.

4. Proceed to the battery, press and hold the power button for at least 2 seconds and release. This will cause the battery display to go into sleep mode until it turns off completely.

5. Wait for 5 minutes for the battery to reset and then turn on the battery again.

6. Then turn on the inverter and after 2 minutes lift the PV and AC breakers in the Sun King protection box.

7. If the issue persists please call the Sun King Inverter Customer Care team on +260 971 243 303

1.  Press the "Set " button on the inverter. This will display "00ESC"  which switches the inverter to setting mode.

2. Press the "Up" button which will lead to setting "01"  and press enter. This will cause the words on the right side of the display to blink until an action is performed. 

3. Press the "Up" until you come to option "UTI." This means the inverter has been configured to prioritize ZESCO as the source power.

4. Press the "Set" button again which will take you back to the main screen where you will see the word "BYPASS" and a dotted line leading to the percentage bar on the right side of the display which signifies how much of the battery is being used.

5. If the issue persists please call the Sun King Inverter Customer Care team on +260 971 243 303

1.  Press the "Set " button on the inverter. This will display "00ESC"  which switches the inverter to setting mode.

2. Press the "Up" button which will lead to setting "06"  and press enter. This will cause the words on the right side of the display to blink until an action is performed. 

3. Press the "Up" until you come to option "CUB." This means the inverter has been configured such that ZESCO can charge the battery even when solar is available.

4. Press the "Set" button again which will take you back to the main screen where green light will blink provided the battery is not fully charged. (when fully charged the light is idle/ does not blink)

5. This is not energy saving.

6. If you prefer the energy saving options repeat the first 2 steps and select the "SNU" option. which means solar and utility will charge at the same time.

7. Press the "Set" button again which will take you back to the main screen where an icon for the solar panel and utility are connected by dotted lines and leading to the percentage bar.

8. If the issue persists please call the Sun King Inverter Customer Care team on +260 971 243 303

Possible Cause: 

The inverter is configured to prioritize utility (grid) power instead of solar and battery power. Common incorrect modes include UTI (Utility) or SNU (Solar and Utility).

To reduce grid usage, the inverter must be set to:

• SBU (Solar → Battery → Utility) for load priority

• OSO (Only Solar) for charging priority

Step A: Set Load Priority to SBU (Solar → Battery → Utility)

1. Press the SET button to enter Setting Mode.

2. Press the UP button to scroll to Setting 01.

3. Press ENTER. The current mode (for example, UTI) will start blinking.

4. Press UP or DOWN until SBU appears on the screen.

5. Press ENTER to confirm.

6. Press SET to exit Setting Mode.

This ensures the inverter uses solar first, then battery, and only uses utility power when necessary.

Step B: Set Charging Priority to OSO (Only Solar)

1. Press the SET button to enter Setting Mode.

2. Press the UP button to scroll to Setting 06.

3. Press ENTER. The current mode (for example, SNU) will start blinking.

4. Press UP or DOWN until OSO appears on the screen.

5. Press ENTER to confirm.

6. Press SET to exit Setting Mode.

This ensures the battery is charged only from solar, not from utility power.

If the Issue Persists

• Confirm solar panels are generating power during daylight hours.

• Check that batteries are connected and functioning.

• Contact the Sun King Inverter Customer Care team on +260 971 243 303