VanBelkum›Trailers›VB4-MST

VB4-MST Mobile Security Trailer

Solar-powered, cloud-managed video security you tow to the site, set up in minutes, and run without power, trenching, or a network drop. When the sun runs short, the onboard generator starts itself, and you watch power and cameras from anywhere.

Request a quote See the specs Download spec sheet (PDF)

1,800 WSolar, 4 × 450 W

Up to 19.2 kWhGel battery, 24 V

Auto-startOnboard generator, standard

RemotePower and cameras

The VB4-MST deployed: four solar panels out, stabilizer jacks down, mast raised with cameras at the top

Where it’s used

Coverage where nothing is wired yet.

Temporary and remote sites get hit before permanent cameras go up, if they ever do. The VB4-MST brings its own power, network, and cameras.

Construction sites

Equipment and materials sit out overnight long before the building has power or cameras. Cover the yard from day one.

Parking lots

Break-ins, slip-and-fall claims, and after-hours incidents, with video and plate reads when you need the evidence.

Remote locations

Substations, cell sites, farms, events, and temporary facilities with no power or network to tie into.

On the mast

A head built for your site.

The mast head is configured per client. Pick the mix of cameras, deterrence, and lighting the site needs; the cellular gateway rides up top with them. A hand-crank telescoping mast lifts the head to 25 ft, with optional set points at 15 and 20 ft.

Cameras

Verkada PTZ, multi-sensor, fisheye, and bullet cameras, mixed to cover the site.

License plate recognition

Optional dedicated LPR cameras for vehicle identification, hot lists, and lot management.

Deterrence

Speakers for automated or live voice-down, strobes, and sirens. Warn people off before anything happens.

Lighting

LED area lighting powered by the solar system, so a dark site stays lit without running power.

Intercom

Two-way audio to talk with crews on site, or with someone who should not be there.

Cellular gateway

4G LTE/5G at the mast head with two SIM slots. Live video, alerts, and remote access wherever there is coverage.

Mast head from below: a PTZ camera, a fisheye camera on the equipment box, and a horn speaker — A typical head: PTZ camera, fisheye on the equipment box, horn speaker for voice-down.

Power

Sun first. The generator covers the rest.

Four 450 W panels charge a 24 V battery bank all day. When a long overcast stretch drains it, the onboard generator starts itself, recharges the bank, and shuts off. Nobody has to drive out.

1,800 W solar array

Four 450 W high-efficiency panels, fixed angle, on racks that slide out on site and stow for towing. An MPPT controller turns their output into the right charge for the batteries.

Gel battery bank

Sealed gel lead-acid (VRLA) batteries, 12 V 200 Ah each, wired in pairs for 24 V: 9.6, 14.4, or 19.2 kWh. Lithium optional.

Auto-start gasoline generator, standard

When the bank drops to a set voltage, the generator starts, charges, and shuts itself off. VanBelkum sets the thresholds for your battery type before delivery. An integrated fuel tank with its own gauge keeps it running between visits.

Shore power

A 30 A twist-lock inlet charges the bank from mains power while the trailer keeps running. The adapter cord to a standard 110 V plug is sold separately; we can supply one.

120 V outlet

A household outlet on the cabinet, fed by a 500 W inverter, for a laptop, chargers, or a small tool.

Four solar panels slid out over the trailer body

The onboard gasoline generator strapped down in its compartment on the trailer — The onboard gasoline generator in its compartment. It starts on low battery and stops when the bank is full.

Battery capacity

Batteries	Capacity	Best for
4	9.6 kWh
6	14.4 kWh
8 (as built)	19.2 kWh

All three are sealed gel lead-acid (VRLA) at 24 V. Each battery is 12 V, 200 Ah, or 2.4 kWh. The array covers a two-to-four-camera load comfortably from spring through fall in Michigan. Winter deployments, or a full load of cameras, lights, and speakers, lean on the generator or a shore-power top-up. We’ll help you size the bank for the site and the season.

Remote management

Watch the power and the cameras from anywhere.

Two dashboards, both over the trailer’s own cellular link. Power runs on a Victron system controller; cameras run in Verkada Command. No site visit to check either one.

Power: Victron

Touch display in the cabinet shows solar coming in, battery voltage and charge, and what the loads draw
Remote power dashboard over cellular: charge, solar, load, and generator, from anywhere
Low-battery alerts so you plan a top-up instead of reacting to one
Generator start/stop run by the system controller, thresholds set for your battery type
VictronConnect app on your phone when you are standing at the trailer

Cameras: Verkada

Verkada Command for live view, playback, and alerts in a browser or the mobile app
AI analytics that tell people and vehicles from animals and weather
Detect & Deter: AI-triggered deterrence responses
License plate recognition on LPR-equipped heads
Cloud-managed firmware updates and camera health monitoring
API and SSO for larger teams

Inside the locked cabinet: generator controller, battery meter, power key, the touch display, and the inverter — Inside the cabinet: generator controller and battery meter across the top, the Victron touch display to the right.

What’s included

Configured to the site.

Every VB4-MST runs on the Verkada platform. Cameras, analytics, and options are chosen per site.

Included	VB4-MST Verkada platform
Verkada cameras and Command	Included
AI person and vehicle detection	Included
Cloud management and mobile app	Included
Detect & Deter	Capable
License plate recognition	Optional
4G LTE/5G cellular	Included

Built for unattended sites

Locked down, leveled, and easy to move.

Locked, ventilated cabinet

The electrical system lives in a locked enclosure with tamper-detect sensors and proximity alerting. Know when someone approaches or opens it.

Optional GPS

Real-time location and geofence alerts, so you know where the trailer is at all times.

Four stabilizer jacks

Outriggers level the trailer and hold it steady with the mast up.

Vandal resistance

Steel construction and tamper-resistant fasteners.

Road-ready

Single axle, taillights and reflectors, and a standard 2-inch ball hitch. Tow to site, level it, raise the mast, go live.

Inside the locked equipment cabinet: the system controller, generator controls, and power distribution — Inside the locked, ventilated cabinet: controls and power distribution.

The 30 A twist-lock shore-power inlet on the side of the cabinet — The 30 A twist-lock shore-power inlet.

Specifications

VB4-MST at a glance

Download spec sheet (PDF) › One printable page, US Letter.

Solar array	Four 450 W high-efficiency panels (1,800 W) on slide-out racks, fixed angle
Battery	Sealed gel lead-acid (VRLA), 24 V. 12 V 200 Ah batteries in pairs: 9.6, 14.4, or 19.2 kWh nominal (four, six, or eight batteries; 19.2 kWh as built). Lithium optional.
Charging	MPPT solar controller; 30 A twist-lock shore-power inlet (adapter cord to a standard 110 V plug not included); onboard gasoline generator with automatic start and stop, standard
Outlet	120 V household outlet on the cabinet, 500 W inverter
Mast	Telescoping, hand-crank winch standard (electric winch optional), locking pin at full height. 25 ft; optional set points at 15 and 20 ft.
Head	Client-configured: cameras, LPR, speakers, strobes, LED lighting, intercom
Connectivity	Cellular gateway at the mast head, 4G LTE/5G, two SIM slots
Remote management	Victron system controller with touch display; remote power dashboard over cellular (charge, solar, load, generator); VictronConnect app on site
Platform	Verkada cameras and Verkada Command
Cabinet	Locked and ventilated, tamper-detect sensors and proximity alerting, optional GPS
Trailer	Single axle, taillights and reflectors, four stabilizer jacks, 2-inch ball hitch
Warranty	Limited warranty; terms vary by component. Verkada cameras carry Verkada’s hardware warranty, up to 10 years

Warranty

Limited warranty.

Every VB4-MST carries a limited warranty. Terms vary by component, and some components are covered for up to 10 years. Ask us for the terms on your configuration.

The trailer

Trailer frame, axle, and structural components
Solar panel mounting and wiring
Battery system and power management
Telescoping mast and deployment mechanism
Equipment enclosure and environmental seals

Limited warranty. See the manufacturer warranty for details.

Components

Verkada cameras: Verkada’s hardware warranty, up to 10 years
Cellular modem: manufacturer’s warranty
LED displays: manufacturer’s warranty
All components sourced from authorized channels

In the field

Mast up, panels out, jacks down.

The VB4-MST set up on grass with the mast fully raised and the camera head against a clear sky

Front three-quarter view of the VB4-MST with stabilizer jacks down and solar panels tilted out

Rear view of the VB4-MST with all four solar panels open and the mast raised

The VB4-MST from the rear corner, panels open, mast raised above the trees

Setup and operation

The user guide covers the rest.

Setting up, raising the mast, running the power system, and packing up are in the VB4-MST user guide on VanBelkum Help, with photos and line drawings for every step.

vanbelkum.help