How To Read Solar Inverter Display: A Step-By-Step Guide

If you’re like me, and I bet you are, then a big reason why investing in solar is even an option is that you want to save money on your electricity bills. A key part of doing that, though, is learning how to read your solar inverter display.

This will help you spot ways to optimize your energy consumption, which, in turn, will help you save some more cash.

That being said, this article is going to teach you exactly how to look through your solar inverter display, and I’ll keep it very simple, focusing on the important bits like how much energy you’re making and if your system’s performance is running smoothly. Are you ready? Let’s get to it!

How to read solar inverter display: A step-by-step guide

Step 1: Powering up

First things off, just tap any button under the screen to wake it up. This lights up the solar inverter screen, so you can see all the data it’s been keeping track of.

Step 2: Diving into the main menu

Next, hit the ‘MENU’ button. That’s your golden ticket to all the main options and settings.

Step 3: Finding out how much energy you’ve generated

Most solar inverters have a button on the right-hand side. Press that one to pick the ‘Total’ option. It’s right there at the top of the screen, showing you all the energy you’ve collected from the sun.

Step 4: Seeing your total energy output

Lastly, tap the ‘Enter’ button on the far right to check out the grand total of energy you’ve generated or the power output since you got the system set up.

There you go! Just a few simple steps to get all the insights on your energy production.

On top of this information, however, your solar inverter displays status indicators, too.

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What status indicators does my solar inverter give me?

Solar inverters can tell you whether they’re in standby mode or flash mode, or whether they detect faults in your system. Here’s what each of those means:

Standby mode

The solar inverter switches to standby when it’s either waiting for enough sunlight or for the battery to charge adequately. This typically happens under low-sunlight conditions or when the battery levels are below the required threshold for normal operation.

Flash mode

It occurs during a firmware update, which can either be conducted wirelessly or via a direct RS485 connection. This is a normal indication that simply means your solar inverter is receiving enhancements to improve performance.

Fault indicator

The display screen on your solar inverter will show a fault when, well… it detects that there’s a malfunction in your system. At the same time, the fault indication will also halt operations until the issue is resolved.

This is a critical signal that requires your immediate attention to either prevent further system damage or keep your savings flowing.

Displays when the solar inverter or system encounters a malfunction, halting operation until the issue is resolved. It’s a critical signal that requires immediate attention to prevent further system damage.

Here’s a list of common error codes and their solutions:

  • E01 – Ground Fault: Indicates that there is a leakage or fault in the grounding of the PV array.
    • Solution: Inspect the PV array and cabling for damages or exposure that might cause grounding issues. Repair or replace damaged components as necessary.
  • E02 – Over Temperature: The solar inverter has overheated due to excessive ambient temperature or insufficient ventilation.
    • Solution: Ensure adequate ventilation around the solar inverter and remove any obstructions. Consider installing a cooling solution or relocating the inverter to a cooler location.
  • E03 – DC Input Over Voltage: The DC voltage from the solar panels exceeds the maximum input voltage of your solar inverter.
    • Solution: Check the PV panel configuration to ensure it matches the inverter’s voltage requirements. Adjust the panel array configuration if necessary.
  • E04 – AC Output Short Circuit: A short circuit has occurred in the AC output of your solar inverter.
    • Solution: Inspect and test the AC wiring and connected loads for short circuits. Repair or replace wiring as needed, and remove faulty loads.
  • E05 – No Utility: This error shows when the solar inverter cannot detect the grid.
    • Solution: Verify grid connectivity and check the main AC breaker. Contact the utility company if the grid is down or if there are issues with the grid connection.
  • E06 – PV Input Low Voltage: The voltage from the solar panels is too low for the solar inverter to operate.
    • Solution: Check for shading on panels, clean the panels if dirty, and ensure that all connections are secure and not damaged. Adjust the panel array to match the inverter’s minimum voltage requirements.
  • E07 – Anti-islanding: The solar inverter has detected isolation from the grid but continues to operate in a manner that could create a dangerous island condition.
    • Solution: Test the inverter’s anti-islanding protection feature and ensure it’s functioning correctly. If the problem persists, contact the manufacturer or a professional technician.
  • E08 – Communication Error: There is a failure in communication between the inverter and an external device or monitoring system.
    • Solution: Check all communication connections and cables for damage or loose connections. Reset the communication settings on the inverter or replace the communication module if necessary.

Like typical household appliances, though, please refer to your specific user manual for detailed troubleshooting and safety information. Or, better yet, seek professional help from your solar installer to safely resolve these display-screen solar inverter issues.

Other operational indicators:

  • PV Grid On: Indicates normal operation with all solar-generated power being fed into the grid.
  • PV Charge: The inverter is directing all generated power to charge the battery without exporting surplus to the grid.
  • PV Charge + Grid On: The system is on-grid, exporting excess power while also charging your devices.
  • AC Charge: In the absence of solar input, the inverter uses grid power to charge the battery, assuming this feature is enabled.
  • PV+AC Charge: The inverter charges the battery using both solar and grid power under limited solar conditions.
  • Battery Grid On: The system operates on-grid, relying on battery storage without solar input.
  • PV+Battery Grid On: Power exportation occurs using both solar energy and battery storage.
  • Battery Grid Off: Indicates off-grid operation using battery storage to power devices via a UPS connection without solar input.
  • PV Battery Grid Off: Similar to Battery Grid Off but with the addition of limited solar input to assist battery discharge.
  • PV Charge Grid Off: The inverter operates off-grid, using solar power to charge the battery and providing excess energy through a UPS connection.

Naturally, you’re probably asking why these indicators are crucial. And of course it is. Mainly for safety and reliability, but there are several others, too.

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6 reasons knowing how to read solar inverter displays is important

1. Preventive Maintenance

Recognizing what different statuses mean, such as ‘Standby’ or ‘Fault,’ allows for timely troubleshooting and maintenance. This can prevent minor issues from escalating into major, costly repairs, extending the lifespan of your system.

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2. Optimized Performance

By knowing how to interpret indicators like ‘PV Charge’ or ‘PV+AC Charge,’ you can verify that your system’s performance is operating optimally.

It ensures that your solar panels and inverter are effectively converting sunlight into usable energy and properly managing this energy, whether it’s being used immediately, stored, or fed back into the grid.

3. Energy Management

Understanding statuses such as ‘Battery Grid On’ or ‘PV+Battery Grid On’ helps in managing your energy consumption and storage. It allows for smarter energy use, ensuring that you have power when you need it, and contributing to energy independence.

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4. Cost Savings

Efficient energy management and preventive maintenance lead to cost savings.

By ensuring your system’s performance is up to par and running as efficiently as possible and addressing any issues promptly, you can save money on electricity bills and avoid expensive repairs.

5. Safety

Recognizing fault indicators immediately can also be a matter of safety. Electrical issues, if left unaddressed, could pose a risk.

Timely action based on understanding these indicators can prevent potential hazards.

6. Environmental Impact

Efficient operation of your solar PV system maximizes energy use while also reducing reliance on fossil fuels and minimizing your carbon footprint.

Knowing how to read and react to your inverter’s status indicators plays a small but significant role in contributing to environmental sustainability.

Recommended: 8 of the most important environmental benefits of solar panels


To summarize, we’ve covered how to read the display, what different signs mean, and how to fix common problems. This knowledge lets you keep your system running smoothly and saves you cash in the long run.

Not only that, understanding solar inverter displays is a big step towards smart energy use, as it helps you see how your solar energy system is doing.

If you’ve encountered an issue with your solar system that’s deeper than the ones I outlined here, I suggest you seek professional help.

And while we’re on the topic of solar professionals, we have a network of pre-vetted solar installers that are ready to give you 3 FREE quotes today.