Site Security Before the Power Is Connected: Covering a Construction Site With No Grid and No WiFi

The short answer

A construction site with no grid connection is covered by a solar-powered 4G LTE camera. The panel and battery supply the power, the SIM supplies the network, and nothing has to be trenched, wired, or signed off by the utility. Each unit goes up in 5-10 minutes on a pole, a container corner, or a length of perimeter fence, which means a site can be under camera on the day the hoarding goes up rather than three months later when the temporary supply is finally energised. That is the whole answer to the question. The rest of this article is about doing it properly: where the loss actually sits in the build programme, why motion-triggered cameras under-perform on an open site, how to mount when there is no building yet, and how to move the cameras as the job changes shape around them.

The window nobody budgets for

Security spend on a construction project is usually written into the fit-out and handover stages, because that is when the expensive, finished, easily resold material arrives. The losses, however, start much earlier — during exactly the phase when there is no power to run a camera from and no fixed structure to bolt one to.

The pattern is consistent: the first two phases carry real, unrecovered loss and are the two phases with no permanent electricity. A generator does not solve it, because a generator runs during working hours and is shut down at the end of the shift — which is precisely when the site is exposed. A camera that depends on that generator is a camera that is off during every hour that matters.

It is there when you are not

Site theft is not opportunistic in the way people assume. It is scheduled, and it is scheduled around your programme.

• Between 01:00 and 05:00 on a weekday. No shift, no watchman on the far side of the plot, and a vehicle at the gate looks like an early delivery.
• Saturday night into Sunday. The one predictable 30-hour window with nobody on site at all.
• Public holidays. A long holiday shutdown is the single highest-risk period of a build, and everyone in the industry knows it — including the people planning to visit.
• The gap between phases. A subcontractor finishes, the next one starts in ten days, and for those ten days nobody has a reason to be there or a reason to look.

A camera earns its place by being awake during those hours specifically. Anything that trades away night-time and weekend coverage to save power is trading away the only coverage that was ever going to matter.

Why motion-triggered cameras under-perform on an open site

Most battery cameras stay asleep and are woken by a passive infrared sensor that detects a heat difference moving across its field. That design saves a great deal of power, and on a domestic doorstep it works. On a construction site it fails in three specific ways.

PIR range is far shorter than the lens range

A camera that can resolve a face at the far side of a compound may only trigger on body heat within a fraction of that distance. Anything beyond the sensor's reach crosses the frame unrecorded — the camera was pointing at it and never woke up.

Vehicles and slow movement do not trigger reliably

A truck body is close to ambient temperature. Someone moving slowly along a fence line, or crouching to cut cable, may never produce the sharp thermal transition the sensor is looking for.

The wake-up delay eats the useful seconds

Trigger, wake, focus, start recording — by the time the file begins, the subject is often already inside the frame with their back turned. You get proof that something happened, not a usable image of who.

Always-On Video, usually shortened to AOV, is the industry-generic answer to this. Rather than sleeping until a sensor fires, the camera records continuously and uses on-device AI scene analysis to decide what deserves full-quality encoding and what can be held at a low-power baseline. Nothing is missed because nothing was asleep.

For a site manager, the practical difference shows up during an investigation. With a PIR camera you have four clips and no idea what happened between them. With continuous recording you can scrub back to the moment the vehicle first appeared at the gate and follow it through.

Mounting when there is no building

The absence of a structure is usually treated as the blocker. It is not, provided the mount is chosen for the phase rather than for the finished building.

• Hoarding and perimeter fence posts. The first thing on site and normally the last thing removed. A corner post covers two fence runs at once.
• Site container corners. Containers are already positioned for the site office and the tool store — the two things worth watching — and their corner castings take a bracket well.
• A dedicated pole in the compound. Concrete-set or ballasted, height set so the panel clears the hoarding line and the lens looks down at the gate approach.
• Scaffold standards. Only for the superstructure phase, and only where the scaffold is not coming down before the camera is meant to move.

Two things matter more than the mount itself. First, weatherproofing: outdoor models should be IP66, which is the sealing level you need for driving rain and the dust of a live site. Second, the panel's line of sight to the sky — the most common cause of a disappointing battery week is a panel installed correctly in February and shaded by a tower crane counterweight, a new hoarding board, or the building's own rising frame by April. Walk the panel positions again at each phase change.

Because each unit installs in 5-10 minutes and needs no cabling, moving a camera is a genuinely small job. That is what makes a phase-based plan realistic rather than theoretical.

A phase-by-phase coverage plan

The last row is the one that changes the economics. Cameras that install without wiring are not a sunk cost tied to one project; they are plant that transfers to the next site with the fencing and the containers.

What to check before you order

If you are specifying for a contractor or buying for resale into the construction trade, the questions that separate a good order from an expensive one are narrow and specific.

Resolution

1080p to 2K is the standard range and is genuinely sufficient for gate and perimeter identification at sensible mounting distances. 4K exists as a custom or OEM build, not as an off-the-shelf assumption, and demanding it by default costs money and storage for very little evidential gain.

Storage

microSD up to 128GB is standard, with larger capacities only on custom orders. Specify how long the site actually needs to be able to look back — a fortnight of retention that survives a holiday shutdown is worth more than a headline capacity figure.

Certification

Shenzhen Leksell has been building this category since 2012 and holds TÜV Rheinland certification alongside CE, FCC and RoHS. For public-sector and main-contractor work, the certificates are frequently a submission requirement rather than a preference — ask for them at quotation stage, not after the container has shipped.

Lead time

Samples move by air in 7-10 days. Bulk orders go by sea and land in 25-40 days. Inside Vietnam, delivery from the Ho Chi Minh City office runs 7-10 business days. A project security package that is ordered when the hoarding goes up will not arrive before the risk does — order against the programme, not against the site start.

Commercial terms

MOQ is 10 units for a trial and 100 for OEM or private label. Dealer margin is 20% from around 10 units and 30% from around 50, and OEM branding is available across the whole 150-SKU catalogue, which matters if you are a site services firm putting your own name on the housing.

Getting a specification together

The fastest route is to send the site boundary, the phase programme, and the number of positions you want covered at each phase. That produces a model and quantity recommendation rather than a generic quote, and it usually reduces the camera count, because a plan that relocates units through the build needs fewer of them than a plan that treats every position as permanent.

Browse the catalogue at /en/products/, see volume terms at /en/wholesale/, or read the technical background on continuous recording in the AOV solar camera guide.

For quantities, current pricing, and a phase plan for a specific site, message the team on WhatsApp at +86 188 1869 9870 or email info@solaguard.net.