Sometimes you have a room where Wi-Fi won’t reach. You’ve tried moving the router. You’ve tried changing channels. But the back bedroom, the garage, or the extension is still a dead zone.
Running an Ethernet cable would fix it, but that means drilling through walls or running cables across the floor. Not ideal.
There’s a third option that most people don’t know about: powerline adapters.
How It Works
You buy a pack of two powerline adapters. They look like small plugs, slightly larger than a phone charger.
- Plug one into a wall socket near your router. Connect it to the router with an Ethernet cable.
- Plug the other into a wall socket in the room with bad Wi-Fi. Connect your device (or a switch) to it with another Ethernet cable.
- That’s it. Your electrical wiring is now carrying internet.
Some powerline adapters also broadcast Wi-Fi, so the far-end adapter becomes a wireless access point for that room.
Does It Actually Work?
Usually, yes. But there are conditions.
When it works well:
- In the same house (same electrical panel)
- On the same ring or circuit
- In newer homes with good wiring
- Over short distances (same floor, nearby rooms)
When it struggles:
- Across different floors (the signal has to travel through the fuse box)
- In older homes with degraded wiring
- Through surge protectors or power strips (plug the adapter directly into the wall)
- In homes with unusual wiring (two separate electrical systems, or outbuildings on a sub-panel)
- When there’s electrical noise from large appliances (fridge compressors, washing machine motors)
Speed - Manage Your Expectations
Powerline adapters advertise speeds like “AV1000” or “AV2000.” Like router speed numbers, these are theoretical maximums that you’ll never see in real life.
Real-world speeds are usually 30-50% of the advertised number. An “AV1000” kit might give you 200-400 Mbps in good conditions and 50-100 Mbps in bad ones.
That’s still enough for streaming, browsing, and video calls. It’s not enough for large file transfers or serious gaming.
The comparison:
| Method | Real-world speed | Reliability |
|---|---|---|
| Ethernet cable | 1,000 Mbps (full gigabit) | Perfect |
| Powerline (good conditions) | 200-400 Mbps | Very good |
| Powerline (bad conditions) | 30-100 Mbps | OK |
| Wi-Fi (same room) | 200-600 Mbps | Good |
| Wi-Fi (through walls) | 20-100 Mbps | Variable |
| Wi-Fi extender | 10-50 Mbps | Poor |
When to Use Powerline
Good use cases:
- A single room where Wi-Fi doesn’t reach and you can’t run a cable
- A desktop computer in a far room that needs a stable connection for work
- A smart TV that keeps buffering because Wi-Fi signal is weak
- Temporary setup (rental property where you can’t drill holes)
Bad use cases:
- Gaming (you want the lowest possible latency - use real Ethernet)
- Whole-house networking (run cables or use mesh, not powerline)
- Connecting outbuildings (garage, shed, guest house - powerline won’t work across separate electrical systems)
- High-bandwidth file transfers between computers
The Comparison People Miss: Powerline vs Mesh vs Ethernet
| Ethernet | Powerline | Mesh Wi-Fi | |
|---|---|---|---|
| Speed | Best | Good (in right conditions) | Good |
| Reliability | Best | Good | OK |
| Easy to install | Hardest | Easy | Easy |
| Cost | Low (cable is cheap) | Medium ($40-$100) | Medium to high |
| Looks | Cables everywhere | Small plugs | Small nodes |
| Best for | Permanent setups, gaming | Single dead zone | Whole-house coverage |
The short version: If you can run Ethernet, run Ethernet. If you can’t, powerline is the next best option for a single room. If your whole house has bad Wi-Fi, use mesh instead.
What to Buy
- Basic (single room): A simple pair of powerline adapters without Wi-Fi. Plug the far one into your device. $40-60.
- With Wi-Fi (the far end also works as an access point): Slightly more expensive but useful if you have multiple devices in that room. $60-100.
- With a pass-through socket: The adapter has a normal power socket on the front so you don’t lose the wall outlet. Worth paying a few extra dollars for.
Brands: TP-Link, Devolo, and Netgear are the main players. TP-Link’s AV1000 kit is the most popular and usually works well enough.
What to Do Now
- Identify the room with bad Wi-Fi
- Check if you can run an Ethernet cable. If yes, do that instead.
- If you can’t, buy a powerline kit from a shop with a good return policy
- Plug one adapter near the router, one in the dead zone
- Test the connection. If it’s fast enough for what you need, keep it. If not, return it.
- If powerline doesn’t work either, consider mesh Wi-Fi or moving the router closer
Not sure which option fits best? See Wi-Fi Extenders vs Mesh vs Powerline — The Complete Comparison.