Delta Solivia Model 15 EU G4 TL and Model 20 G4 Tl – Common Error Messages

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  • Energy bill higher than usual?

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  • Installer gone broke?

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  • Out of manufacturer’s warranty by just a few months?

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Delta inverters are made in Thailand but services Australia.

Delta are an average quality type of inverter. Delta is still operational here.They have a service department but warranty issues can be time consuming if your installer has gone broke. We have had success in proving that the delta inverter is faulty and organising replacement parts. If you have any issues with your inverter, Delta offers a support Delta has a quality rating of 6.1/10 and service rating of 7.0/10 (according to cleanenergyreviews.com).

Trouble Shooting Tips

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Below is a list of fault readings and solutions to help you better understand your solar inverter and aid the quick fix of an error related to your Delta Solivia Model 15 EU G4 TL and Model 20 EU G4 TL inverter:

Error MessagesSolutions
AC Freq HighCheck grid frequency on the inverter terminal as well as checking the country setting
AC Freq LowCheck grid frequency on the inverter terminal as well as checking the country setting
Grid QualityCheck the harmonics of the grid volt-age as well as the grid connection. The inverter may need to be moved further away from a non-linear load
HW Connect FailCheck AC connection against specifications
AC Volt LowCheck the utility voltage connection to the inverter terminal as well as check the country setting
AC Volt HighCheck the utility voltage connection to the inverter terminal as well as check the country setting
Solar1 HighModify the solar array setting and make the Voc less than 1000 Vdc
Solar2 HighModify the solar array setting and make the Voc less than 1000 Vdc

Below is a list of fault readings and solutions to help you better understand your solar inverter and aid the quick fix of an error related to your Delta Solivia Model 15 EU G4 TL and Model 20 EU G4 TL inverter:

Fault ReadingsSolutions
HW DC InjectionCheck utility waveform. Grid connection of the inverter may need to be moved further away from a non-linear load
TemperatureCheck ambient environment
Ground CurrentCheck the insulation of solar inputs as well as checking the capacitance, which must be less than 2.5uF. This can be solved by installing an external transformer.
InsulationCheck the insulation of solar inputs as well as checking the capacitance. Dry the PV panel if wet.
Bus UnbalanceCheck the input connections as well as check the PV array insulation
HW Bus OVRCheck the input connections as well as check the PV array insulation. Modify the solar array setting by making the Voc less than 1000 Vdc.

Please note that these are general tips only and are based on our current and past experience and therefore, not specific to your solar inverter problem. What we usually find is people trying these troubleshooting tips and if these fail, they give us a call and we can perform diagnostic tests.

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  • 50% of the time it’s a quick easy fix for any solar tech…
  • Error messages and fault codes that are due to an external fault elsewhere in the solar system.
  • The solar system is tricking the inverter into thinking it has that error or fault.
  • o External faults are relatively easy to find and repair. Once fault is repaired, the inverter is back online.
  • 50% of the time it’s a quick easy fix for any solar tech…
  • There is a fault, which requires more diagnostic type of testing to locate the fault. Out of these about 1 in 4 can be solved onsite. Things like a dodgy install or water damage somewhere.
  • The rest of the time it’s the inverter that’s the problem. 1 out of every 2 times the inverter can be sent away for repairs or we can organise those repairs under warranty with the manufacturer, and…
  • The rest of the time the inverter was of low quality and either not fixable of not good value to fix. If this is the case we would quote on an inverter with similar specs to replace it with. Getting your system back online fast with high quality parts.
  • In the worst case scenario, rare ground leakage faults are very difficult to find and fix but we have also had experience locating these aswell.
Be careful some dodgy solar guys will just say you need a new inverter without performing any tests just so they can sell you a new inverter that you may not even need!
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Nevertheless, we can help you with any solar problem you may have. Call us on 1300 796 500!

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