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ONIS VISA Power Generators & Motorpumps

Visa SpA is a company dedicated on design, production, sales and rental
of generating sets, motor pumps and power solutions.


With star the start of each of the three phases is connected together. Connections are taken from the ends of the three phases to give the three phases
Star symbol voltage


With Delta the starts and ends of the phases are connected. The end of phase 1 is connected to the start of phase 2, the end of phase 2 to the start of phase 3, and the end of phase 3 to the start of phase 1. Connections are taken from the three start-end points to give the three phases.
Delta symbol voltage

Company profile

Company profile

Visa S.p.a. is a leading Italian company that has been successfully present in the market since 1960, projecting and manufacturing highly technological generating sets and power stations. With its network currently present in more than 80 countries in the world, Visa SpA offers the most suitable solutions with a high standard of quality and technology in many areas and countries. "ONIS VISA" gensets and power stations, ranging from 9.0 to 3.000 kVA, are completely manufactured in Italy and offer the best technological and quality features. Thanks to a research and development team of engineers, who are completely dedicated to projecting customized solutions and developing special and sophisticated projects for more complex applications, Visa SpA can support its clients assuring the highest quality solutions.

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Competence sectors

Visa SpA provides high-tech solutions that can be tailored to all situations and sectors: from telecommunications to construction and engineering, industry, as well as hospitals, retail and entertainment, just to name a few. Beside the complete standard range, Visa SpA manages to offer more sophisticated generating sets for more complex applications. Onis Visa generators, with their many variants, are among the most versatile and complete in the market, competing with a world that is increasingly more orientated towards electricity generation.
Data Centers Generators img

In an increasingly virtual world where exchange of critical information is getting more and more important, data centers demand an extremely reliable and constant...

Thanks to our experience and continuous research targeted towards technological innovation, Visa SpA offers solutions that are suitable for every requirement, also...

Industry and Services |  Onis Visa Generators

Visa SpA provides reliable and high-performance gensets and energy solutions. In manufacturing plants, even a small power outage could lead to hours of costly...

Telecom |  Onis Visa Generators
With over 50 years of experience in the energy market, Visa SpA offers a range of products designed to meet the needs of the Telecommunication sector, one of the most...
Defence and Civil Aid |  Onis Visa Generators

The Onis Visa Gensets for military use are designed to meet the requirements of forces operating in harsh environments and built to a very demanding specification....

Tourism and Big Events |  Onis Visa Generators

Recent severe weather events have resulted in serious hurricanes, tropical storms, heavy snowfalls, strong hurricane-force winds and widespread storm surges and...

Large Scale Retail |  Onis Visa Generators

Businesses lose money when they shut down during a blackout. Even a small power failure could lead to hours of costly downtime. Considering the impact of significant...

Power Stations |  Onis Visa Generators

Power stations are used for small scale production of electric power, and where there is no other easily available alternatives of producing electric power. Diesel...

Latest products

Onis Visa range of products has grown in order to provide an answer to all market requirements; it offers a comprehensive range of quality-assured, versatile and high-tech energy solutions which can be tailored to all situations. Beside high-quality generating sets, also different types of control panels, accessories and spare-parts are available, in standard or customized versions.
Advanced single gen-set controller for stand-by and prime power applications. Direct communication with EFI engines, total remote monitoring and control, easy to install, configure and use, wide range of communication capabilities, connection via RS232, RS485, CAN and on board USB..
cricket generating sets
Developed as a response to the need of a product that focuses on the essential necessities, it is easy to install, with an efficient cost/quality ratio and particularly suited for hostile weather conditions. One of its main innovation is the wide stackability capacity and measurement optimisation to significantly reduce the shipping costs
For over 35 years, Visa S.p.A. has been designing and developing energy solutions for the telecommunications industry. Transceiver stations (or BTS) are key components of any network, since they...
The range of Dry-Prime motorpumps are built for pumping water with solids holdup, containing sand or other abrasive solids in suspension. The special design makes these pumps suitable for different applications where unclean liquid pumping and water displacement are necessary.

Other sectors

Visa SpA also provides services and products in sectors others than standard electricity generation, such as rental and water, through specific divisions and trademarks. Thanks to that production diversification, Visa SpA has managed to acquire an important know-how in different areas, giving way to new ideas and project development.

Rental Division

Rental Division

Sometimes depending on power gensets with ultimate reliability is crucial to sustain power supply to the most sensitive operations in the most demanding conditions. Onis Visa fleet of 300 sound-attenuated generators of recent production ranging from 9.0 to 2000.0 kVA, are designed and developed to deliver a high quality service for non-stop power performance, all of them equipped with safety features that comply with the strictest regulations and standards. Different versions are available to meet your every need. Amongst the services available, Visa SpA provides dedicated consultation for projects’ study and development, as well as it grants crane trucks for the delivery and...


Water division

Visa SpA, through its trademark Nettuno®, has successfully been present in the water treatment sector for over 40 years, offering self-propelled irrigation systems and high quality motor pumps for agriculture and industry. The reliability and versatility of Onis Visa products are due to the use of the best components and latest technology which gives high performance as well as savings in operating costs. The experience gained in the entire world, under the most different and difficult environmental conditions, allows to completely satisfy all the modern agriculture needs, in compliance with environmental respect and following the strictest standards. Visa SpA provides high-...


Latest news

We will exhibit at the new international trade event dedicated to the Power Generation: DPE Distributed Power Europe, which will take place from 5 to 8 November 2019, contemporary with  Key Energy  and Ecomondo 2019 at Rimini Fiera Expo Centre in Italy.

Also this year Visa SpA will be participating to "HOTEL 2019", the exhibition specifically dedicated to the hotel and restaurant sector.

From 14th to 17h October 2019, it will be held in Bozen, in the heart of South Tyrol.

We are glad to present Onis Visa Genset installation by the Television Tower in Lithuania, the tallest man-made structure in Europe at 326.5 meters high and the second tallest in all the Baltic states.

VISA SPA recently supplied generating sets for a Data Center in Kazakhstan to power a primary bank group inside a commercial complex hosting various other activities that are expected to be themselves integrated in sharing the same spaces and service later on.


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