There is a precise moment when an installation stops being a half-day job: when you realize there isn't a socket at the spot where the camera needs to be. This isn't a product problem, it's a site problem — and it needs to be solved before ordering, not after.
There are always the same three scenarios, and they each have different solutions in terms of cost and complexity. It is worth knowing how to distinguish between them, because choosing the wrong one means either spending ten times as much or having to go back to the site in six months.
First case: the network cable is already there
If a network cable starts from the cabinet, the power is already there: it travels along the same twisted pair as the data. You just need something to put it in.
The INJ-POE-30W-V2 does exactly this and costs €18.45. Two RJ45 ports, one for network input and one for device output, IEEE 802.3af and 802.3at standards, up to 30 W, full gigabit. It's suitable for a bullet, a dome, an access point, an IP intercom. Be careful where you place it: the casing is IP20 and works between -10 and 50 °C, so it is a device for a cabinet or indoors, not for a pole.
When the device draws more power — a PTZ with a heater, an outdoor access point, a camera with an illuminator — 30 W is not enough and you need the bt standard. The INJ-POE-10G-60W reaches 60 W and carries 10 Gbps, in a metal casing, for €38.05. Twenty euros more that prevents the camera from restarting on its own every time the heating kicks in — the most difficult fault to diagnose in existence, because it never happens during the day.
Second case: the power is there, but it needs to be protected
Here the problem isn't getting the power there, it's making it survive. A system that turns off at every power surge is not a security system: it's a system that works on the days you don't need it.
For a single point, the right container is a watertight box with a DIN rail inside to place the power supply, switch, and whatever else is needed. The BOX-403022-IP65 measures 40x30x22 cm, is made of polyester, has a ventilation filter and an adjustable DIN rail, and costs €78.40. It is the honest way to terminate a junction on a wall without improvising with an electrician's box.
When the remote point has to support an entire system, however, it is better to use an already equipped cabinet. The SF-BOX0812V-UPS-IP55 is an SMC cabinet — polyester reinforced with fiberglass, which is the material that doesn't rust or crumble in the sun — measuring 600x500x230 mm, IP55, containing an 8-port switch, power supply, DIN rail, three 12 V DC outputs for a total of 200 W, a fiber splicing tray with four SC UPC connectors, and a provision for a 12 V backup battery. It works from -20 to 70 °C. It costs €922.32.
The important number in there isn't the switch: it's the fiber tray. It means that this box can be the point where the fiber backbone ends and the copper network begins — and that is exactly what is needed in a warehouse, a parking lot, or a sports facility where the network cable alone cannot cover the distance.
Third case: the power is not there at all
A gate in the countryside, a construction site, an isolated warehouse, a stretch of fence far from the building. Here it is not a question of protecting the power supply: you need to generate it.
The complete solution is a solar cabinet. The SF-BOX08SOL-BMS-IP55 is an 80x60x30 cm, IP55 box containing a charge controller with an input of up to 100 V — so a 60 V panel, or two 30 V panels in series — a charging current of up to 20 A, an 8-port PoE switch (two 90 W and six 30 W) plus two SFP slots, a circuit breaker and surge arrester already installed, and a 2.5" display that tells you what is happening without having to connect a laptop. It weighs 22 kg and costs €1,145.98. The panel and the battery are not included: they must be sized based on actual consumption, and this is the part of the job where people make the most mistakes.
Because that is where the mistake happens: you size the panel based on a day in July. A system that works perfectly in August has only four hours of useful sun in December in Sicily instead of ten, and even less on cloudy days. The rule of thumb is to size for the worst month and keep three days of battery backup, not one.
And how do the data get there?
Once the power is resolved, the connection remains. If there is no fiber or copper, you switch to the mobile network.
The SF-ROUTER-4G-UPS-4P costs €83.01, has four LAN ports, 2.4 GHz Wi-Fi, LTE CAT 4 up to 150 Mbps download and 50 Mbps upload, two 5 dBi external antennas, and a 7.4 V 2000 mAh battery that gives it about six hours of independent runtime. Those six hours are the difference between "the system is down" and "the system warned that it was going down".
Two things to keep in mind before proposing it. The SIM is not included and must be chosen with an appropriate data plan: a 4K camera recording to the cloud burns through tens of gigabytes per month, while a burglar alarm that only sends events consumes less than one. And the 4G signal must be checked on-site before signing the quote, not after: two bars on your phone at the entrance don't say anything about the reception inside a metal box two meters off the ground.
The special case: the alarm system that must last for months
If the isolated point is an alarm control panel rather than a camera, the calculation changes completely, because the consumption is orders of magnitude lower. The SF-BATT-75V-3200WH is a 7.5 V 3200 Wh zinc-air battery with a jack, mini-USB, and molex connector and two meters of cable, compatible with Hub 2 and Hub 2 Plus. At a consumption of 250 mA, it lasts about 1,700 hours, which is just over two months. It costs €129.12.
It is the right answer for a ruin, a vacation home, or a seasonal warehouse: no panel, no regulator, no maintenance; you just change the battery. It is not the answer for a system that needs to stay on for years — in that case, solar power, despite being more involved to set up, costs less in the long run.
In short
If there is a network cable, a twenty-euro injector solves it. If there is power but it's unstable, a box with a DIN rail and a backup battery. If there is nothing, a solar cabinet and a 4G router — and the panel is sized for December, not July.
The thing that all three cases have in common is that you decide beforehand, by looking at the site. If you have a difficult spot and don't know which of the three cases it falls into, write to us with two photos and the distance from the cabinet: it's faster than experimenting.