No Wi-Fi at that Corner? Consider a Pair of Powerline Adapters!

Dong Ngo | Dong Knows Tech In Powerline networking, adapters come in all shapes and sizes.

When it comes to extending a network, you should always use network cables. Connecting an access point to an existing router via cable, for example, is the best way to extend your Wi-Fi network without losing performance. But getting our home wired can be challenging, sometimes not even possible. And that’s where Powerline networking comes into play.

What is Powerline networking?

In a nutshell, Powerline networking turns existing electrical wiring into that of a computer network. In other words, apart from bringing power — electricity, that is — from one wall socket to another, the wiring behind the wall now also carries network signals.

As a result, you can quickly extend your network to wherever there’s a wall outlet. It’s quite smart if you think about it! In every house, the electrical wiring is already there, so why not take advantage of that, right?

Dong Ngo | Dong Knows Tech Powerline networking requires a pair of adapters to create the first connection.

Pros and Cons of Powerline networking

Like everything else, Powerline has its pros and cons. It’s not for everyone, and it doesn’t work in every situation.

Pros of using Powerline

The primary advantage of Powerline, clearly, is the convenience. You can extend your wired network in a matter of minutes without running any cables. It’s as easy as plugging a couple of adapters into wall sockets.

For example, if you have a basement with thick concrete walls that Wi-Fi signals can’t reach, Powerline is so much easier than digging and drilling to run an actual network cable there.

Cons of using Powerline

Unfortunately, this list is rather long:

Some Powerline adapters have a pass-through socket.
Dong Ngo | Dong Knows Tech Some Powerline adapters have a pass-through socket.

Not available in all homes

In my experience, though rare, Powerline doesn’t work in some old houses, those built decades ago. It’s likely because of the type of electrical wiring used at the time.

The distance between the two adapters needs to be less than 900 feet (300 meters). However, keep in mind that this is the length of the wiring behind the wall. Electrical wiring tends to snake around the house and can easily be longer than the actual distance between the sockets.

Also, the sockets have to belong to one continuous power wiring set. And sometimes it’s hard to find out if they are since you don’t see the actual wiring.

Direct plugging required

Powerline adapters don’t work well, if at all, with surge protectors or power strips. They need to plug directly into a wall receptacles to work, and therefore, you lose one power socket for each Powerline adapter you use.

Since most adapters are rather bulky, you might have to sacrifice the adjacent outlets too, unless you get adapters with a pass-through socket, but this means the adapter itself will be extra bulky.

Slow speeds

Sluggish and unreliable speed is one of the most significant shortcomings of Powerline compared to using network cables.

You’ll find plenty of adapters with the claimed speeds of 1200 Mbps, 2000 Mbps, or even faster rates. However, keep in mind that no matter how fast the Powerline standard is, an adapter’s actual ceiling speed is that of its network port on the adapter, which currently caps at 1000 Mbps (1 Gbps).

And in real-world usage, generally, in ideal conditions, you’ll get somewhere between a third to a half of the Gigabit standard. The fastest Powerline connection I’ve seen is around 500Mbps, just half of a real Gigabit connection, but only at a relatively short distance. At a farther cross-room distance, the throughput now reduced to just a third of that.

For the most part, though, Powerline adapter kits can deliver a modest Internet connection in full. However, if you have Gigabit Internet, or plan on using Wi-Fi 6, definitely consider running network cables.

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A Powerline connection is susceptible to interferences from appliances such as washers, dryers, ceiling fans, refrigerators, and so on. When these devices are in operation, your Powerline connection’s speed might suffer. Furthermore, circuit breakers and lousy wiring can also adversely affect Powerline’s performance.

Bad compatibility

Adapters of the same Powerline standard are supposed to work with one another. In reality, though, getting adapters of different vendors to inter-operate, though possible, can be challenging. You’re better off getting all the adapters you need from the same vendor.

The Comtrend PG-9172PoE is one of a few power-line adapter on the market that support power-over-Ethernet.
Dong Ngo | Dong Knows Tech The Comtrend PG-9172PoE is one of a few Powerline adapters on the market that supports power-over-Ethernet.

How to use Powerline adapters

Now that you know what you’re getting into let’s find out how you can set up a Powerline network. This process is generally the same for all makes and models of Powerline adapters.

Most Powerline adapters take the shape of a wall plug and have at least one network port to connect to a router (or switch) or a wired device. Generally, you’ll need a pair of adapters for the first connection. However, a few routers, such as the ARRIS SURFboard SBR-AC3200P, have built-in Powerline support, in which case you can skip the primary adapter.

The general Powerline setup process

Though powerline adapters come in different shapes and standards, you can use the following steps to set up any of them.

  1. Connect the first adapter to the router (or switch) using a network cable and plug it into a wall socket. (Skip this if you have a Powerline-enabled router). After this, all other outlets in the house are Powerline-ready.
  2. Plug the second adapter into a wall socket at the far corner of the room you’ll be using it in, and that’s it! The two adapters will turn the electrical wiring in between them into a network cable.
  3. Connect a wired device, like a printer or a desktop computer, into the second adapter’s network port, also using a network cable — that device will now be part of the network. By the way, each device that connects to the network via a Powerline connection is called a node.
  4. After the first connection, you need another adapter for each additional node, repeating step #2 but at a different wall socket. That said, the rule is: you need three adapters to connect two wired devices, four adapters to connect three, and so on. Generally, you can add from 6 to 64 nodes in a Powerline network, depending on the Powerline standards.
  5. By itself, Powerline doesn’t include Wi-Fi. That said, to bring Wi-Fi to the far corner, connect a Wi-Fi access point to the Powerline adapter at that location. Alternatively, you can also get a Powerline adapter with a built-in Wi-Fi access point, like the Netgear PLPW1000-100NAS.
A Powerline adapter at work.
Dong Ngo | Dong Knows Tech A Powerline adapter at work.

Powerline networking: Privacy concerns

Since Powerline uses the electrical wiring to deliver a network signal, will your neighbors be able to tap into your network by using an adapter of their own? The answer is: this depends.

If you live in a residential single-family home, there’s no need to worry since Powerline signals can’t cross a transformer, which separates the power connections of different houses on the same street.

However, if you live in a condo, there’s a chance of exposing your home network to other condos when using Powerline adapters. That said, though, most adapters have encryption you need to configure — via pressing a button — before they can work together. If you buy a kit of two adapters, chances are the two adapters are already set up to work only with each other.

So make sure your network is secure: always use Powerline adapters with encryption turned on.

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4 thoughts on “No Wi-Fi at that Corner? Consider a Pair of Powerline Adapters!”

  1. Can you use a Powerline network to add an access point when your main wireless network is a mesh network? The outside of my house has a weak signal. I have a Powerline network that compliments my mesh wireless network because I have some devices that can’t do wireless. But there is one area in my backyard that would benefit from an access point added (and it happens to be near one of my Powerline adapters)

  2. From experience a couple added notes…
    1. if you have two different models of Powerline adapters, even from the same manufacturer) always use the one with the latest/highest spec/speed at the primary router.
    2. If you want to hardwire more than one device in one location, you can either get Powerline adapters with dual Ethernet ports (TP-Link makes some, probably others), or connect a Gigabit switch to the adapter. At one point I had 3 computers and two VOIP phones connected to an 8-port switch that was on the other side of a chimney 40 feet from my main router. Now I have the VOIP phones (1 ObiHai, 1 Ooma) hardwired at the router but still have the ability to connect computers out on my porch, and I am preparing to move an AIMesh node into my detached garage so it gets a good enough signal to install a smart garage opener.


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