CCTV Power: How to Keep Your Cameras Running Smoothly
Got a new security camera and wondering how to power it? You’re not alone. In the UK most people think “just plug it in”, but there are several ways to keep a CCTV system alive, and each has its own pros and cons. This guide walks you through the most common options so you can pick the one that fits your setup and budget.
Wired Power Options: PoE and Mains
Power over Ethernet (PoE) is the tech that lets a single cable carry both data and electricity. It’s popular for indoor cameras because you only need one cable to run from your router or PoE switch to the camera. Most PoE cameras work on 48 V and draw between 5‑15 W, so a standard 802.3af switch is enough for a few units. If you’re installing a larger system, look for 802.3at (PoE+) which pushes up to 30 W per port.
The other common wired method is a regular AC adapter that plugs into a UK 230 V outlet. These adapters usually output 12 V or 24 V DC, matching the camera’s internal regulator. They’re cheap and easy to find, but you’ll end up with a tangle of power bricks, especially if you have cameras spread across a property. Make sure the adapter’s amperage rating meets the camera’s requirement – using a lower‑rated supply can cause flickering or early failure.
Backup and Off‑Grid Power: Batteries and Solar
Power cuts happen, and a dead camera is a useless camera. Battery backup units (often called UPS) give you a few minutes to an hour of runtime, depending on the load. For a single PoE camera, a small 12 V 10 Ah battery can hold the line for about 30 minutes. If you need longer protection, cascade batteries or move to a larger UPS that also covers your NVR.
Solar panels are a great off‑grid solution for remote or standalone cameras. A 50‑W panel paired with a 12 V 20 Ah battery can run a low‑power camera 24/7 in most UK locations, assuming you have decent sunlight. The key is to size the panel and battery for the camera’s average draw and seasonal variations. Many solar kits come with a built‑in charge controller, so you don’t have to worry about over‑charging.
When you choose backup power, keep an eye on the camera’s power consumption. New 4K models can use 10‑20 W, while older 720p units might only need 5 W. Knowing the exact wattage helps you avoid over‑specifying and spending extra money.
Here are a few quick tips to make your power plan work:
- Use PoE wherever you can – it simplifies wiring and reduces points of failure.
- Match the power supply voltage and amperage to the camera’s specs.
- Add a UPS or battery backup for critical cameras, especially those covering entry points.
- If you go solar, calculate daily sun hours for your area and size the battery for at least two days of cloudy weather.
- Check UK regulations for outdoor power cables – they must be rated for damp locations and buried safely.
Bottom line: there’s no one‑size‑fits‑all answer. Your choice depends on how many cameras you have, where they sit, and how much backup you need. Pick the power method that lets you install quickly, stays reliable during outages, and fits your budget. With the right power plan, your CCTV system will keep watching, no matter what.
