CCTV Power Planning: Mains vs Solar vs PoE for Rural and Off-Grid Sites

Ask what camera a site needs and you'll get an enthusiastic answer about resolution and night vision. Ask how it will be powered and the room goes quiet — yet power, not optics, is where most CCTV projects come unstuck. A camera with no realistic power plan is either a trenching bill you didn't budget for or a dead lens by Christmas. There are three honest ways to power a camera in the UK: mains, PoE (Power over Ethernet) and solar with battery storage. Each suits a different kind of site, and this guide is the decision framework — what each costs to get in, where each fails, and how to match one to a farm gate, a yard, a compound or a half-built plot. Last updated: July 2026. Start with the site, not the camera The power question is really a distance question. How far is the mounting point from the nearest live supply — and what's between the two? Ten metres along a barn wall is a different project from three hundred metres across a field with a track in the way. Walk the run before you spec anything, because every option below is priced by that walk. Option 1: Mains — the default, until the trench If a mounting point has mains within easy reach, use it. A mains-fed camera has an unlimited power budget: PTZ motors, white-light deterrence, heaters, continuous recording — nothing has to be rationed. Pair it with a 4G connection and you still avoid the broadband problem on rural sites. The catch is getting the supply there: Trenching and armoured cable are the real cost. A run across a yard can cost several times the camera it feeds once you've paid for the dig, the SWA cable and the electrician. Outdoor supplies need doing properly — RCD protection, weatherproof enclosures and a qualified sign-off. This is not an extension-lead job. Temporary sites often can't wait. On construction plots the permanent supply frequently arrives after the highest-theft phase is over — which is exactly the gap solar 4G CCTV on construction sites was built to fill. Mains wins when: the camera is on or near a powered building, the run is short, or the camera's job (PTZ patrols, 24/7 recording, active deterrence) needs a power budget solar can't sensibly supply. Option 2: PoE — one cable, but it's a data cable Power over Ethernet sends power and data down the same network cable, which is why it's the standard for wired IP camera systems on buildings, yards and depots. One cable per camera back to a PoE switch or NVR: no local power socket, no separate electrician visit per camera, and the switch sits indoors on a protected supply — put that supply on a UPS and every camera rides through a power cut with it. Its limits are just as clear-cut: 100 metres per run. Standard Ethernet tops out around 100m; beyond that you're into PoE extenders or fibre, and the "one simple cable" story fades. It's still a cable. PoE moves the trenching problem, it doesn't remove it. Crossing open ground to a gate or paddock costs the same dig whether the cable carries power or power-plus-data. It assumes a wired network exists. PoE suits sites with a comms room and a switch — a farmhouse, warehouse or gatehouse. It has nothing to offer a field. PoE wins when: you're putting several cameras on and around buildings you control, runs are under 100m, and you want central power, central recording and one tidy cable per camera. Option 3: Solar + battery — power where there is none For everywhere the first two can't reach — field gateways, livestock pens, fuel stores, lanes, plots with no supply yet — a solar panel charging a battery is the answer, and paired with a 4G SIM it makes the camera completely self-contained. No trench, no electrician, no broadband; the solar-powered 4G camera range is built around exactly this. The discipline is sizing. A British winter day delivers a fraction of the solar energy of a summer one, so a system sized for the average year dies in December — the single most common off-grid failure. Size the panel and battery for the worst month, keep the panel south-facing and shade-free, and budget the camera's draw honestly (a motion-activated 4G camera sips; a continuously streaming PTZ gulps). The off-grid solar calculator does the arithmetic for your camera and location in about a minute, and the off-grid farms buyer's guide goes deep on winter sizing. Solar wins when: there is no supply and no economic way to bring one — which describes most of the rural, remote and temporary sites we quote. It's also the only option you can move: lift the camera, panel and pole and redeploy the lot to the next hotspot. The decision in one pass Camera on a powered building? Mains — or PoE if there are several cameras and a switch to run them from. Several cameras around buildings, runs under 100m? PoE back to one switch, on a UPS if power cuts matter. Open ground, no supply, or a temporary site? Solar + battery + 4G, sized for December, no argument. Marginal case — supply exists but the trench is long? Price the dig against a solar kit. The trench loses more often than people expect. Mixing options on one site is normal, not messy: PoE on the yard, mains on the workshop PTZ, solar on the far gateway — all reporting into the same app. Getting it right Power planning is where we earn our keep: tell us the site, the mounting points and what each camera has to do, and we'll spec mains, PoE or solar per position — sized for a UK winter, not a brochure summer. Start with the Solution Builder, browse the solar-powered camera collection and the wired and 4G CCTV camera range, or talk to our UK team. Free UK delivery on orders over £75; trade pricing for installers.