Mobile Video Surveillance for Solar Plants Under Construction: Buying a Network That Moves With the Work Front

The short answer: self-powered nodes that move with the work

A solar plant under construction is protected by a movable network of self-powered nodes — 4G cameras with their own panel and battery that mount on a temporary fence post, a container corner or an already-driven pile, and that get repositioned in five to ten minutes with no trench, no electrician and no change to the electrical design. It is the only architecture compatible with a site where the work front advances every week and where, until energisation, there is nothing at all to plug a camera into. Fixed CCTV with fibre and an auxiliary supply belongs to the operating phase; what an EPC contractor buys during execution is autonomy, 4G coverage, IP66, continuous recording and a low enough cost per point to hold spares and move them when theft shifts to a different corner of the site.

What gets stolen, and in which phase

A solar construction site's risk profile is not constant — it tracks the programme. Buying security without mapping the phases means guarding the laydown yard in the month it is already empty.

Two observations that change a purchase decision. First, the laydown yard concentrates more value per square metre than anywhere else on the site, and only for a few weeks. Second, the work front moves, so the highest-risk position in month three is not the one in month six. A system that cannot be repositioned covers the wrong place very well.

Why fixed CCTV does not fit the programme

An integrator proposing concrete poles, fibre and a feed from a distribution board is proposing a project inside your project. In practice it hits four realities:

• There is no power. Until energisation there is no auxiliary supply, and the generator that stands in for it is switched off when the crew leaves — precisely when exposure starts.
• There is no network. PV sites are built where land is cheap: no fibre, no backhaul, and often no usable WiFi more than a few metres from the site office.
• The layout changes. Trenches, haul roads and the temporary fence line all move during execution. A containment run installed in month two can end up under a trench in month five.
• The asset is stranded. What gets installed for construction is rarely what operations wants afterwards, so it is written off.

The trailer-mounted tower

The usual alternative — a trailer-mounted mobile surveillance tower with a generator — solves mobility but brings fuel, servicing, a vehicle to reposition it and a cost per point that keeps the count low. You end up with two or three towers on a site that needs fifteen angles.

Sizing the purchase

A rule that survives a tender: count fixed points and mobile points separately.

Why the spares are not an extra

Fixed points are bought once and left. Mobile points are the heart of the system — they follow the work front. The spares are what separate a network that adapts from one that documents last month's theft. Because each unit mounts in five to ten minutes with a couple of straps or a clamp, moving six nodes is one person's morning, not a variation order.

PIR triggers versus continuous recording on a live site

Almost every battery camera on the market wakes on PIR: the infrared sensor senses a thermal change and only then starts recording. On a solar construction site that fails in two opposite ways at once. By day it fires constantly — crews, trucks, plant, vegetation — and whoever receives the alerts stops opening them inside a week. At 03:00, with a body moving slowly along a trench and a warm night flattening the thermal differential, it triggers late or not at all.

Always-On Video (AOV) is the opposite model, and an industry-generic term rather than any vendor's trademark: continuous 24/7 recording at low standby power, with AI scene analysis deciding what deserves an alert rather than whether to record. The practical difference on site is that you have the vehicle arriving, not just the fragment after the sensor fired, and that you can reconstruct a whole shift when the shortage is noticed three days later during a stock count — which is how it is almost always noticed. Our AOV solar camera guide covers how both models behave in the field.

What to write into the specification

Require the supplier to name the exact SKU behind every figure. A datasheet quoting a generic range without saying which model it belongs to is the single most common reason delivered equipment does not match the quotation.

Lead times, volumes and margins

SolaGuard is the wholesale brand of Shenzhen Leksell, a TÜV Rheinland certified manufacturer established in 2012, with CE, FCC and RoHS certification. The catalogue is 150 SKUs with wholesale prices quoted per order, all available OEM or private label — which matters to an integrator handing the system over under its own name.

• MOQ: 10 units for a trial order, 100 for OEM or ODM.
• Dealer margin: 20% from around 10 units, 30% from around 50.
• Lead times: samples 7 to 10 days by air; bulk 25 to 40 days by sea; Vietnam stock 7 to 10 business days.

Scheduling against the materials date

That sea freight window is the figure most often underestimated in construction procurement. If modules land in the laydown yard in month four and the order is placed in month three, the cameras arrive late. Order samples during design, verify 4G coverage on the actual site with a real unit before committing to the batch, and schedule the shipment against the materials delivery date rather than the site start date. Browse the full range or request wholesale pricing with your layout and programme attached.

From construction into operation

The financial argument that closes most of these purchases is that nothing is thrown away at handover. The same nodes that covered the work front are repositioned to their permanent operating positions — gate, substation, inverter stations, fence corners — on the day the plant is handed over. No stranded asset, no second purchase, and the owner inherits a system that has already run for months on that specific terrain, with its cellular coverage proven.

Two conditions make that work: agree in the contract who owns the equipment at completion, and record the final positions on the as-built drawing. A surveillance network nobody formally inherits ends up dismantled in a container.

Quote a project. WhatsApp +86 188 1869 9870 or email info@solaguard.net with the plant capacity, the construction programme and the number of simultaneous work fronts, and we will come back with a point count and volume pricing.