A beep is a message, not always a breakdown
Hybrid inverters from Sunsynk, Deye, Victron, Growatt and others all use a buzzer, a coloured light or a code on the screen to get your attention. Some beeps are warnings, for example a low battery or an overloaded circuit. Others are faults, and the inverter will switch itself off to protect the system.
The meaning of each beep pattern and code is different for every brand and model. Do not trust a code list from a forum for a different model. The only reliable list is in the user manual for your exact inverter, or in the brand's app.
What to do in the first five minutes
Stay calm and look before you touch anything. The aim is to collect facts that an installer can use.
- Write down the exact code, any colour or flashing pattern, and the time.
- Note whether the grid was on or off, and whether the beeping started when load-shedding began or ended.
- Note what was running. A kettle, geyser, oven or pool pump starting up is a common trigger.
- Check the app or the screen for the battery percentage and the load figure.
- Take a photo of the screen so you can send it to your installer.
Common causes in plain words
Many alarms trace back to a handful of causes. You can look for these without opening anything.
Overload: you are drawing more power than the inverter or battery can deliver. Switch off the heaviest appliances and see if the alarm clears. Low battery: the battery is nearly flat and the inverter is warning you before it cuts out. Grid trouble: when the municipal supply is unstable, spikes or dips can make the inverter trip. This often shows up during load-shedding changeover. Heat: an inverter in a hot, closed space or in direct sun will reduce its output and may alarm. Make sure the vents are clear and nothing is stacked against it.
Some codes point to wiring, earthing or a failed part. Those are not something you can fix.
One reset is fine, repeated resets are not
If the manual says to restart the inverter, do it once in the order the manual gives. Many models need the AC and DC isolators switched off and on in a set sequence. If you are not sure of the sequence, do not guess.
If the same code comes back, stop resetting it. Repeated restarts can hide the cause and put stress on the battery and the inverter. A code that returns is a job for an installer.
What you must never do
Never open the inverter. Never open or move a battery. Never touch DC cabling from the panels or the battery, even if the system looks switched off. Panels make DC voltage whenever there is light, and a battery stores energy even when the inverter is off. This work is for a qualified installer who has the right tools and training.
When to call an installer
Call one if the code repeats, if the inverter will not start, if you smell burning or see a swollen battery or melted plastic, or if the breaker keeps tripping. In an emergency, switch off the main AC supply to the system at the DB board only if it is safe to reach, and keep people away.
When you message us on WhatsApp, send the brand, the model, the code and the photo. A local installer can then tell you what the quote visit will involve before any work starts.
The job behind this: Inverter not working.