How Do I Power My G4 Doorbell Pro? (Complete Guide)

How Do I Power My G4 Doorbell Pro? (Complete Guide)

Quick Answer overview: If you have the G4 Doorbell Pro and want to power it, you can charge it using the PoE adapter or the USB-C cable with a wall adapter.

Keeping an eye on your doorstep has never been easier than with the UniFi G4 Doorbell Pro. This sleek and feature-packed doorbell boasts high-definition video, two-way communication, and even fingerprint recognition for added security. But before you can unlock the full potential of your G4 Doorbell Pro, you'll need to get it powered up.

This guide will walk you through the different ways to power your UniFi G4 Doorbell Pro, ensuring your smart doorbell is up and running in no time. Don't worry, the process is surprisingly simple!

What are the three power options for the G4 Doorbell Pro?

  1. 16 to 24VAC
  2. 1.25A max
  3. 50/60 Hz

Powering Options for Your G4 Doorbell Pro

Powering Options for Your G4 Doorbell Pro

The G4 Doorbell Pro offers you three convenient ways to get the juice flowing:

1. Existing Doorbell Wiring

If you already have a wired doorbell, you can likely leverage the existing wiring to power your G4 Doorbell Pro. This is the most common and straightforward option. However, there's a small caveat:

Compatibility Check: Make sure your existing transformer provides 16-24 volts AC (VAC) with a minimum of 20VA (Volt-Ampere) and operates at 50/60Hz. If your transformer doesn't meet these requirements, you'll need to upgrade it before installation.

2. PoE (Power over Ethernet)

For a cleaner and more modern approach, you can utilize Power over Ethernet (PoE). This technology allows you to transmit both data and power through a single Ethernet cable, eliminating the need for a separate power adapter.

What You'll Need: To use PoE, you'll need a PoE injector or switch capable of delivering 802.3af PoE standards. Ubiquiti offers a compatible PoE injector specifically designed for their UniFi Protect devices.

3. USB-C Power Adapter

The G4 Doorbell Pro also comes equipped with a USB-C port. This allows you to power the doorbell using a compatible USB-C power adapter (sold separately).

Adapter Requirements: Ensure the USB-C adapter you choose provides 5 volts DC (VDC) with a minimum of 2 amps (A).

Choosing the Right Power Option

The best power option for your G4 Doorbell Pro depends on your existing setup and preferences. Here's a quick breakdown to help you decide:

  • Existing Doorbell Wiring: This is the most cost-effective option if your transformer meets the voltage and power requirements.
  • PoE: Ideal for a clean installation, especially if you're already using PoE for other devices in your network.
  • USB-C Power Adapter: A good choice for temporary installations or situations where existing wiring isn't readily available.

Installation Tips for Each Power Option

Now that you've chosen your power source, let's delve into the installation process for each option:

1. Using Existing Doorbell Wiring

  1. Turn Off Power: Before starting, ensure the power supply to your existing doorbell is turned off at the breaker box. Safety first!
  2. Disconnect Existing Doorbell:  Carefully remove your existing doorbell from the wall bracket and disconnect the wires.
  3. Connect the G4 Doorbell Pro: Following the provided instructions, connect the doorbell wires to the corresponding terminals on the G4 Doorbell Pro.
  4. Test and Secure:  Once connected, turn the power back on at the breaker box. Verify that the G4 Doorbell Pro lights up and functions properly. Finally, securely mount the doorbell onto the wall bracket.

2. Using PoE

  1. Connect the PoE Injector: Plug the PoE injector into a power outlet and connect an Ethernet cable to the injector's PoE port.
  2. Connect to Network:  Connect the other end of the Ethernet cable to your network switch or router.
  3. Mount and Power Up:  Mount the G4 Doorbell Pro onto the wall bracket and connect the Ethernet cable to the doorbell's port. The doorbell should automatically receive power and data through the PoE connection.

3. Using USB-C Power Adapter

  1. Connect the Adapter:  Plug the USB-C power adapter into a power outlet and connect the USB-C cable to the G4 Doorbell Pro's USB-C port.
  2. Mount and Power Up:  Mount the doorbell onto the wall bracket and power it on using the USB-C adapter.

Important Safety Note:  When using the USB-C power adapter option, ensure the power adapter is weatherproof and suitable for outdoor use.

Frequently Asked Questions (FAQ)

Can I use a doorbell chime with my G4 Doorbell Pro?

Absolutely! You can use a traditional doorbell chime with your G4 Doorbell Pro if your existing doorbell wiring meets the voltage and power requirements (16-24VAC, 20VA minimum). However, for a more integrated experience, Ubiquiti offers the UniFi WiFi Chime, which connects wirelessly to your network and provides doorbell notifications throughout your home.

What happens if my power goes out?

The G4 Doorbell Pro does not have a built-in battery backup. However, if you're using PoE, some PoE switches offer backup power options that can keep your doorbell operational during a power outage.

I'm not comfortable working with electrical wiring. Can I still install the G4 Doorbell Pro?

If you're not comfortable working with electrical wiring, it's best to consult a qualified electrician for the installation, especially when using existing doorbell wiring. They can ensure the wiring is compatible and safely connect your G4 Doorbell Pro.

My existing doorbell transformer is too weak. What are my options?

If your existing transformer doesn't meet the power requirements, you'll need to upgrade it to a compatible model that provides 16-24VAC and at least 20VA. Alternatively, you can explore using PoE or a USB-C power adapter for a more straightforward installation.

Can I damage my G4 Doorbell Pro by using the wrong power source?

Yes, using an incompatible power source can damage your G4 Doorbell Pro. Always ensure the power source (existing wiring, PoE injector, or USB-C adapter) meets the specified voltage (16-24VAC for wiring, 802.3af PoE standards, or 5VDC 2A for USB-C) and amperage requirements.


Powering your UniFi G4 Doorbell Pro is a breeze with the various options available. Whether you leverage your existing doorbell wiring, embrace the convenience of PoE, or utilize the USB-C port for temporary setups, you can have your smart doorbell up and running in no time. Now, go forth and enjoy the peace of mind that comes with a constantly monitored doorstep!

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