Growatt Solar Inverter PV Isolation Low
Is your Growatt Solar Inverter showing a PV Isolation Low message?
When your Growatt solar inverter is operating correctly the inverter light will be a solid green. When the light is red it indicates that your inverter has detected a fault with the system – the particular fault details are displayed on the screen.
Growatt Solar Inverter PV Isolation Low – What does it mean?
According to the Growatt solar inverter manual a PV Isolation Low message on your inverter is telling you that the inverter has detected a problem with the insulation on the system. That’s helpful isn’t it? What this means is the system has detected leakage of electricity in the system to earth, and this condition is called an earth fault. The following list are some of the common causes of solar power earth faults that would make a Growatt solar inverter display a PV Isolation Low message:
- Moisture ingress in the solar panels
- Moisture ingress in the cabling, plugs, isolators or inverter
- Damage to cables in the solar power system
The first thing we recommend you try is a reboot of your solar power system.
Rebooting Your Growatt Solar Inverter
It is possible that the error you are seeing with your Growatt inverter is just a glitch which will be fixed by a system reboot. To reboot your Growatt solar inverter please follow these steps:
- Turn OFF the solar supply main switch (or inverter AC isolator if present).
- Turn OFF the PV array DC isolator.
- Wait for the inverter screen to go completely blank and the red fault light to turn off.
- Turn ON the PV array DC isolator.
- Turn ON the solar supply main switch (or inverter AC isolator if present).
- Wait a few minutes while the inverter boots back up.
If immediately after restarting the inverter you see the error message “PV isolation low” unfortunately it appears you may have an issue with your system which is going to require the services of a solar accredited electrician to find the fault and advise you further. If you are in South East QLD somewhere near the Gold Coast or Brisbane area we can help.
For further advice please complete the form above under the URGENT heading and we’ll assist you further.
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i possess an growatt 5000UE inverter which has been working for 2 yrs now and pumped almost 12567 kilowatts of energy working before few days and now displays pv insulation low. Kindly if anyone do help in resolving this issue which would be of great help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Hi Issac, usually a PV isolation low fault in the morning will be caused by earth leakage caused by dew on the solar panels. When the dew dries up by mid-morning the inverter sees that the earth fault has cleared and resumes operation.
I am using Orcedo 10000 and that inverter is give pv isoolation low fault from 5AM in the mornig to 9AM and then it continue to make production. I have checked the insulation and the earthing everything is perfect.
I dont why is it keep doing this?
Hi Stephen, this issue is most likely not an inverter issue but an issue with the solar panel side. Unfortunately being close to the beach these issues are very common. It will require a local solar expert to work out exactly what the issue is. Thanks
Mine (Sungold 3000) comes up with PV isolation low, but mostly after/always after, drizzle or rain. Reboots normally on/after a fully sunny day. I suspect cabling (at junction box on roof) and connectors between PV panels although for the number of years it has been giving me issues a dud panel is not out of the question either. What do you think? An electrician down here will charge me a third to half the cost of a new inverter to troubleshoot.
PS. I live at the beach in SA where salt in the wind is a major issue with everything