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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Sorry Marchel but we do not know of a Growatt Warning 111 message, it isn’t a 117 message by any chance is it? 117 is a relay error message, for more information on the Growatt error 117 click here.
Hello, mij Growatt 3000 gives an warning 111…what can i do ??
Hi Linson, it sounds like you have an earth fault problem on the DC side of your system. This could be an issue with the panels with moisture getting into them, it could be damage to the cabling or isolators etc. We recommend you get in toucg with a local solar accredited electrician who can assist you further with this. If you are on the Gold Coast or Brisbane area we can can certainly help.
Hi,
I have a 10000tl growatt inverter with 2 strings of 5kw panels showing pc isolation low error since it’s commission time.earthingvidms well.when I checj the voltage with Multimeterthe total pv voltage is 630vdc & the +ve to ground is 300v constant.-ve to ground is 60vdc.i don’t know what to do.please help me to sort out this.
Well done Erol, good to hear you were able to get your Growatt isolation low issue sorted. Thanks for letting us know.