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Romanian manufacturer · 3 – 120 kWp · sale and rental

Mobile solar power where the grid stops

Solar power trailers and containers that replace the diesel generator on construction sites, in agriculture, at events and in emergency response. They arrive on site, deploy in minutes and produce without fuel, silently and without a building permit. Equipment for companies, contractors and public authorities, not portable consumer power stations.

See the rangeWhat I save against diesel
We delivered the first high-power mobile solar plant built in Romania
Power
3 – 120 kWp
Deployment
5 – 90min
Fuel
0 litres
Noise
< 20 dB

From road to power

Fifteen minutes, one person

  1. 01

    Arrives on site

    Towed on a standard licence, no oversize transport, no special permits. One person and a van.

  2. 02

    Sits on its stabilisers

    The hydraulic stabilisers come down and take the load. The unit no longer rests on its suspension and stays rigid in wind.

  3. 03

    The wings unfold

    The panels are raised hydraulically on both sides and oriented. Fifteen minutes from arrival.

  4. 04

    It produces power

    The socket is live. No fuel, no noise, no fumes. When the project moves, it folds back just as fast.

Deployment sequence of a VOLTRAIL solar trailer

Panels

0 / 8,1 kWp

Power

0,0 kW

State

transport

A fixed installation of the same size needs design, permits and a grid connection. Here the whole process fits into a lunch break. Scroll to see the sequence.

Most requested

The models that cover most projects

Full range
VOLTRAIL LT9, Solar light towerSolar light tower

VOLTRAIL LT9

Site lighting all night, without a litre of fuel

Solar
3,64 kWp
Battery
38,4 kWh
Inverter
5 kVA

Deploys in 20 min, 1 operator · 2.400 kg

Price on request · sale or rental

Full specifications

Head to head

What changes when the genset leaves the site

Open the calculator

The difference is not only the fuel bill. Transport, maintenance, noise complaints and part of your reporting duties disappear as well.

Fuel
zero, for the base load
Noise
under 20 dB, ventilation only
Maintenance
one annual inspection
On-site refuelling
none
Permits
mobile equipment, no building permit
Relocation
fast, same day
Reportable emissions
avoided emissions report

Applications

Where our units work

Construction sites

Construction sites

Construction site power without a diesel generator

typical load ≈ 45 kWh/day

Infrastructure

Infrastructure

Site power and solar light towers for road and rail works

typical load ≈ 60 kWh/day

Agriculture and irrigation

Agriculture and irrigation

Solar irrigation pumps and off-grid farm power

typical load ≈ 55 kWh/day

Events and film production

Events and film production

Silent generator for events, stage and film production

typical load ≈ 80 kWh/day

Emergency response

Emergency response

Backup power for outages and emergency response

typical load ≈ 35 kWh/day

Telecom and monitoring

Telecom and monitoring

Solar power for relays, sensors and surveillance cameras

typical load ≈ 12 kWh/day

Mining and quarries

Mining and quarries

Mobile solar power for quarries and mining operations

typical load ≈ 220 kWh/day

Defence and humanitarian missions

Defence and humanitarian missions

Containerised solar power for base camps and missions

typical load ≈ 300 kWh/day

Local government

Local government

Mobile EV charging stations with no grid connection

typical load ≈ 50 kWh/day

Manufacturer, not middleman

Unitate VOLTRAIL

We build the units, so we can change them

Because we manufacture, we can change the configuration for your project: a different ratio between panels and battery, additional electrical outputs, a backup genset, a charging point, telemetry that fits your monitoring system. With imported equipment, the answer to any adaptation request is that it cannot be done.

For the same reason, spare parts and service do not depend on an external supply chain. A service call is resolved in days, not in weeks of waiting at customs.

About VOLTRAIL

  • We start from the load, not from the catalogue

    The first question is not which model you want, but what you are powering. Wrong sizing is the most expensive thing in an off-grid system: too little battery and you sit without power in the evening, too much and you pay for capacity that never discharges.

  • We calculate for the location, not for an average

    Irradiation differs by almost 20% between the north and the south of the country. We estimate for the county and the critical month of the project, so you do not find out in November that the system was sized for July.

  • We also say what it cannot do

    A mobile photovoltaic unit does not replace a genset in every scenario. If you have large direct-start loads, permanent night-time consumption or you only work in winter, we say so before the quote, not after delivery.

The range

Four formats, one idea: the energy comes to you

The choice comes down to how the unit reaches the site and how much you consume daily. Everything else, from battery sizing to electrical protection, we calculate for you.

1 – 5 kWp

Skid units

Handled with a forklift or crane, they fit in the bed of a van and start up in minutes. For emergency response, telecom and small work points.

See models5 – 15 kWp

Solar trailers

Road-homologated, towable on a standard licence, under 3500 kg. The configuration that most often replaces the diesel generator on sites and farms.

See models50 – 200 kWp

Folding containers

Complete power plants in an ISO container, deployed in under two hours. For base camps, quarries, infrastructure projects and humanitarian missions.

See modelslighting + power

Solar light towers

A telescopic mast with LED floodlights, powered from panels and batteries. Replaces the diesel light tower, which burns fuel and runs noisily all night.

See modelsno grid connection

Mobile EV charging

Standalone charging stations, no connection and no civil works. They sit on existing parking spaces and can be moved at any time.

See models

Frequently asked

What everyone asks before the first quote

What happens on days without sun?

The battery covers the load for one to three days, depending on the model and the load. For applications that tolerate no interruption, any unit can take a backup diesel genset that starts automatically, or can be tied to the grid where one exists. In practice most clients use the unit as the primary source and keep a small genset for safety, which cuts fuel consumption by 80 – 90% without removing the safety net entirely.

Do I need a building permit?

No. The units are mobile equipment, not buildings, and the trailers are road-homologated. No foundations are poured and the land is not permanently occupied. This is one reason a mobile unit is running within days, while an equivalent fixed installation needs design, approvals and a grid connection.

What licence do I need to tow a trailer?

The T8 and T15 stay under 3500 kg gross weight, so they are towed on a category B licence under the legal conditions for the vehicle-trailer combination. Containers travel on a hook-lift or flatbed truck.

How much does a unit produce in Romania?

Between 1180 and 1400 kWh per year for every kWp installed, depending on the county. The gap between northern Moldavia and the Black Sea coast is about 19%, so we estimate for the exact project location rather than a national average.

Can it be rented instead of bought?

Yes, the whole range is available for rent, with delivery, commissioning and collection included. For projects under six months renting is almost always the better deal. Beyond a year, buying pays for itself out of the fuel saving.

Have a question that is not here? Write to contact@voltrailenergy.com or call +40 769 081 081.

Tell us what you need to power

Send us your estimated load and how long the project runs. We reply with the right unit, the expected output for your location and a comparison against an equivalent diesel generator.

Request a quoteCalculate your savings