photograph · T8
TrailerVOLTRAIL T8
Towable on a standard licence, autonomous for a week
- Solar
- 8,1 kWp
- Battery
- 20,48 kWh
- Inverter
- 10 kVA
Deploys in 15 min, 1 operator · 1.450 kg
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.
- Power
- 3 – 120 kWp
- Deployment
- 5 – 90min
- Fuel
- 0 litres
- Noise
- < 20 dB
From road to power
Fifteen minutes, one person
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.
- 01
Arrives on site
Towed on a standard licence, no oversize transport, no special permits. One person and a van.
- 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.
- 03
The wings unfold
The panels are raised hydraulically on both sides and oriented. Fifteen minutes from arrival.
- 04
It produces power
The socket is live. No fuel, no noise, no fumes. When the project moves, it folds back just as fast.
Panels
0 / 8,1 kWp
Power
0,0 kW
State
transport
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 kWpSolar 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 kWpFolding containers
Complete power plants in an ISO container, deployed in under two hours. For base camps, quarries, infrastructure projects and humanitarian missions.
See modelslighting + powerSolar 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 connectionMobile 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 modelsMost requested
The models that cover most projects
render · T15
TrailerVOLTRAIL T15
The most that fits under 3500 kg
- Solar
- 14,4 kWp
- Battery
- 40,96 kWh
- Inverter
- 20 kVA
Deploys in 25 min, 2 operators · 2.900 kg
render · C60
Folding containerVOLTRAIL C60
A 60 kWp plant inside a 20-foot container
- Solar
- 60 kWp
- Battery
- 122,88 kWh
- Inverter
- 50 kVA
Deploys in 45 min, 2 operators · 11.500 kg
Head to head
What changes when the genset leaves the site
The difference is not only the fuel bill. Transport, maintenance, noise complaints and part of your reporting duties disappear as well.
| Criterion | Diesel generator | VOLTRAIL |
|---|---|---|
| Fuel | 0.3 l for every kWh produced | zero, for the base load |
| Noise | 65 – 75 dB continuously | under 20 dB, ventilation only |
| Maintenance | every 250 hours | one annual inspection |
| On-site refuelling | weekly fuel delivery | none |
| Permits | fuel storage, environmental | mobile equipment, no building permit |
| Relocation | fast | fast, same day |
| Reportable emissions | declared in full | avoided emissions report |
Want the exact figure for your project?
The calculator compares total cost over the project and shows the payback period in months, using the current diesel price and the real irradiation for your county.
Applications
Where our units work
image · 1200 × 750
Construction sites
Construction site power without a diesel generator
typical load ≈ 45 kWh/day
image · 1200 × 750
Infrastructure
Site power and solar light towers for road and rail works
typical load ≈ 60 kWh/day
image · 1200 × 750
Agriculture and irrigation
Solar irrigation pumps and off-grid farm power
typical load ≈ 55 kWh/day
image · 1200 × 750
Events and film production
Silent generator for events, stage and film production
typical load ≈ 80 kWh/day
image · 1200 × 750
Emergency response
Backup power for outages and emergency response
typical load ≈ 35 kWh/day
image · 1200 × 750
Telecom and monitoring
Solar power for relays, sensors and surveillance cameras
typical load ≈ 12 kWh/day
image · 1200 × 750
Mining and quarries
Mobile solar power for quarries and mining operations
typical load ≈ 220 kWh/day
image · 1200 × 750
Defence and humanitarian missions
Containerised solar power for base camps and missions
typical load ≈ 300 kWh/day
image · 1200 × 750
Local government
Mobile EV charging stations with no grid connection
typical load ≈ 50 kWh/day
Manufacturer, not middleman
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 VOLTRAILWe 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.
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 tocontact@voltrailenergy.comor 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.