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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Don’t buy Growatt at all. Biggest piece of s@@t i ever bought.
Hi Alexander, during normal operation I wouldn’t expect your Growatt inverter to beep. I’d recommend checking on the inverter screen at the time of the beep. Is it showing a fault code or error message?
I have installed a Growatt model name Min.5000 TL-X about a year and a half ago and its saved me heaps on my power bill.
Over the past month or so it beeps every 20-30 minutes. Is this a fault?
Hi Graeme, it sounds like the inverter is probably fine, it’s most likely an issue somewhere on the solar panel side of the system. I’d recommend getting in touch with a local solar accredited electrician to assist you further.
Hi Simon.
I have a growatt 5000mtl about 8 years old. Since the wet season arrived I’ve been getting the dreaded pv isolation low fault each morning. So i switch off the 3 input isolaters, reboot them 10 seconds later and it starts no problem. It can be raining, and will still restart. Does this sound like a inverter problem. Been doing this for 30 days straight.