Solar Help/Info

How to Reset Your Solar PV System (No Battery)

When to do this: If your system has stopped generating electricity (and it's daylight), the inverter screen is blank, or it's showing a fault light/error code. A full shutdown and restart can often clear these issues. Only perform this during daylight hours.

Pro-Tip: Before you reset the system, take a photo of any error code or fault light displayed on the inverter. If the reset does not solve the problem, this information will be essential for your installer.

Step-by-Step Instructions:

  1. Find Your Switches: You will need to locate your solar PV system switches. There will be an AC isolator (usually a red switch in a grey box, often labelled 'PV AC Isolator') and one or more DC isolators (usually located next to the inverter).
  2. Shutdown Procedure (Order is important):
    • Step A (AC OFF): Turn OFF the AC power to the inverter. Start with the switch in your main consumer unit labelled 'Solar PV'. Then, turn off the main AC isolator switch.
    • Step B (DC OFF): Now, turn OFF the DC isolator(s) connected to the solar panels. This will stop the flow of power from the panels to the inverter.
  3. Wait: The inverter screen should go blank. Leave the entire system powered down for at least 15-20 minutes to allow all components to fully reset.
  4. Startup Procedure (Reverse order):
    • Step A (DC ON): Turn ON the DC isolator(s) first.
    • Step B (AC ON): Next, turn ON the AC isolator switch, and then turn on the 'Solar PV' switch in your consumer unit.
  5. Restart & Monitor: The inverter will now begin its startup sequence, which can take several minutes. You should see lights flashing, and the screen will cycle through various messages. Wait for it to settle. A green light typically indicates it is generating power correctly.
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