PoE sounds technical, but it's actually one of the simplest ideas in CCTV.
If you've ever looked at a CCTV installation and wondered "where does the camera get power from?" — PoE is the answer. PoE stands for Power over Ethernet. It means a single network cable can carry both data (the video signal) and electrical power to the camera at the same time.
No separate power outlet near the camera. No bulky power adapters. Just one clean Ethernet cable.
This guide explains PoE in plain language — why it matters, how it works, the different standards, and why we use it for most IP camera installations in Nakuru.
What Exactly is PoE?
Power over Ethernet is a technology that allows network cables to carry electrical current. Normally, Ethernet cables are used only for data — like connecting your computer to the internet. PoE takes that same cable and also sends low-voltage power through it.
For CCTV, this means an IP camera can be connected with just one cable that provides both the network connection (for video) and the electricity (for power). This is a huge advantage over older analog systems, which required a separate coaxial cable for video and a separate power cable for each camera.
Traditional CCTV vs PoE CCTV
How PoE Works
PoE requires two main components:
- PoE Injector or PoE Switch: This device injects power into the Ethernet cable. It's usually located near the recorder or network switch.
- PoE-Enabled Camera: The IP camera must support PoE. Most modern Hikvision, Dahua, and Uniview IP cameras do.
Here's the flow: The PoE switch sends power and data over the Ethernet cable to the camera. The camera uses the power to run, and sends video back over the same cable. Simple.
How Power and Data Flow Over One Cable
Why PoE is a Game-Changer for CCTV
PoE offers several significant advantages over traditional analog or non-PoE IP setups:
- Simpler installation: One cable per camera instead of two. Less drilling, less clutter.
- Flexible placement: You can install cameras wherever you need them, without worrying about a nearby power socket.
- Easier maintenance: Fewer cables mean fewer points of failure.
- Centralised power backup: With a UPS on the PoE switch, all cameras can stay powered during blackouts.
- Neater appearance: No ugly power adapters or trailing cables. Ideal for homes and businesses.
For homes in Milimani, Kiamunyi, or any estate where aesthetics matter, PoE is a major plus. See our home CCTV packages.
PoE Standards: Not All PoE is Equal
There are different PoE standards, and they differ in how much power they can deliver. If your camera needs more power than the switch provides, it won't work properly.
| Standard | Max Power per Port | Common Use |
|---|---|---|
| PoE (IEEE 802.3af) | 15.4W | Basic 2MP/4MP fixed cameras |
| PoE+ (IEEE 802.3at) | 30W | 4K cameras, PTZ cameras, built-in IR heaters |
| PoE++ (IEEE 802.3bt) | 60W–100W | High-power PTZ cameras, multi-sensor cameras |
Most standard fixed cameras work fine on regular PoE. PTZ cameras or 4K cameras with strong night vision often need PoE+. We assess your specific cameras during the free site survey to ensure compatibility.
PoE Power Levels Comparison
When PoE Might Not Be the Best Choice
PoE is excellent for most IP camera systems, but there are a few situations where it might not be ideal:
- Very long cable runs (over 100 metres): Ethernet has a maximum practical distance of about 100 metres. For longer runs, you may need a PoE extender or a different solution.
- Existing coaxial infrastructure: If you already have coaxial cables installed, upgrading to PoE may require rewiring. In some cases, HD-over-coax might be a more cost-effective upgrade path.
- Remote areas without network infrastructure: If the camera is very far from any building, solar-powered analog or 4G battery cameras might be simpler. See solar CCTV options.
PoE Distance Limit: 100 Metres
Our Recommendation for Nakuru
For new IP camera installations, we almost always recommend PoE. The benefits in terms of clean installation, reliability, and centralised power management far outweigh any extra cost for the PoE switch. This is especially important in larger homes and businesses where cabling neatness matters.
If you already have older coaxial cables and want to upgrade gradually, we can advise whether to reuse them with HD-over-coax or replace them with Ethernet for PoE. See our upgrade services.
Ready to simplify your CCTV installation with PoE?
Book a free site survey. We'll assess your property and recommend the right PoE setup — clean, reliable, and future-proof.
📋 Book Free SurveyOr call: 0722 625 525
Frequently Asked Questions
Most modern IP cameras from Hikvision, Dahua, and Uniview support PoE. Always check the camera specifications before buying.
Yes. You can use a PoE injector to add power to a single camera, or a PoE switch to power multiple cameras.
The maximum reliable distance is 100 metres for standard Ethernet cable. Beyond that, you need a PoE extender or another solution.
PoE itself doesn't provide backup power, but if you connect the PoE switch to a UPS, all cameras on that switch can keep running during outages.
The PoE switch may cost slightly more upfront, but you save on power adapters, electrician work, and cabling. Overall, it's usually more cost-effective.
Yes, but you need to ensure the switch or NVR supports both. We can advise on the best configuration during a site survey.