Choosing the right configuration
Canopied or open generator?
The choice between a canopied and an open generator depends on the installation site, noise requirements, service access and the overall operating solution. We will help you choose the right variant for your specific application.
- Two configurations
- Noise and weather protection
- Eight selection criteria
- Complete solution
Generator configuration
The configuration is part of the design, not just a matter of appearance
When choosing a generator, attention usually focuses on output, brand or price. An equally important part of the design, however, is the configuration — whether the generator will be canopied or open.
Canopied and open generators differ in more than appearance. The difference is mainly in where and under what conditions the machine will operate — how much noise is acceptable, how protection is ensured, what the installation requires and how servicing is done.
Both variants have their place and the right choice always depends on the specific application. Below we explain what each version means and when it makes sense.
Canopied generator
Engine and alternator are enclosed in a sound-attenuated and protective canopy — a compact unit designed primarily for outdoor operation or installations without specialised facilities. The canopy attenuates engine noise and helps protect the machine; the degree of weather protection depends on the model and its IP rating.
Open generator
Engine and alternator are without a protective enclosure — visible and accessible. Intended for installation inside a prepared machine room or technical room where ventilation, cooling, acoustics and protection are provided by the building itself.
Canopied configuration
When does a canopied generator make sense?
Outdoor installation without shelter
The canopy shields the machine from rain, snow, dust and direct sun — but the degree of weather protection depends on the specific model, its IP rating, ventilation design and placement.
Lower operating noise
Sound insulation inside the canopy attenuates engine noise. A canopy is sound-attenuated, not soundproof — for sites with noise limits it is the standard configuration, with the achievable level confirmed per model.
Commercial and city buildings
Hotels, office buildings, hospitals and shopping centres — places where a compact and quiet installation is a condition.
Compact, self-contained solution
Everything in one unit — engine, alternator, fuel tank and control. Simple installation and easy relocation.
Protection of the equipment
The enclosed configuration protects the machine from unauthorised interference, vandalism and adverse operating conditions.
Open configuration
When does an open generator make sense?
Machine rooms and technical rooms
If the generator is installed in an enclosed space with prepared ventilation and cooling, its own canopy is not necessary.
Industrial operations with facilities
Production plants and industrial halls where acoustics and ventilation are addressed at the level of the building or the process technology.
Maximum service accessibility
The open construction allows direct access to all components — fast diagnostics and service intervention.
Integration into a larger whole
Easier connection to external fuel systems, switchboards or the site's control systems.
Specific acoustic solutions
Projects where sound attenuation is designed as a separate part — a container, an enclosure or an acoustic room. An open unit requires a properly engineered protected room, enclosure or container — including ventilation, cooling, exhaust, acoustics and safe access. An engine is not operated in occupied or unventilated spaces; a purpose-designed, separated plant room requires competent design with the exhaust safely discharged outdoors. Installation is a matter for qualified engineers, not a do-it-yourself task.
Key criteria
What influences the right choice of configuration?
The choice between a canopied and an open generator is not a matter of taste — it is a technical decision that depends on the specific conditions of the project.
Each of the factors below can be decisive in a particular case. The right result emerges only when they are assessed as a whole in relation to the given project and installation site.
The choice cannot be generalised without knowing the project
A canopied generator is not always the better option — and an open one is not always cheaper. It depends on where the generator will go, what it will be used for and what the operating requirements are.
Installation site
An exterior location without shelter almost always calls for a canopied configuration. An interior with a prepared machine room can be suitable for an open unit.
Noise requirements
A canopy reduces the noise level. In built-up areas or where hygiene limits apply, the canopied configuration is standard.
Climatic conditions
Outdoor installation in Central Europe must account for winter temperatures, humidity and summer overheating. The canopy and its ventilation design address these demands.
Service access
How often and how intensively will the machine be serviced? The open version offers better access, the canopy offers protection.
Compactness of the solution
A canopied generator forms a single transportable unit. For projects where easy handling is a priority, this is key.
Type and character of operation
A standby source for a hotel differs from the backup of an industrial plant. The type of operation strongly influences the choice of configuration.
Protection of the equipment
In locations with physical security requirements or aggressive environments, the canopy provides mechanical and operational protection for the machine.
Electrical installation interface
The method of connection, the position of the incoming point and the integration of the ATS can influence which configuration is more advantageous from an installation point of view.
Clear comparison
Canopied vs open from an operational point of view
| Aspect | Canopied | Open |
|---|---|---|
| Noise | Lower — the canopy attenuates engine noise (sound-attenuated, not soundproof) | Higher — depends on the installation environment and room acoustics |
| Protection against the elements | High — enclosed configuration with a model-specific IP rating | Depends on the installation site and the building's facilities |
| Service access | Access through the canopy service doors | Direct access to all components |
| Installation requirements | Lower — no prepared machine room required | Higher — requires facilities, ventilation and cooling, exhaust and acoustics |
| Suitability for outdoors | Yes — primarily designed for outdoor use | No — requires an enclosed space |
| Compactness | High — everything in one unit | More modular — easier integration into larger systems |
The characteristics above are general. Specific parameters depend on the output, configuration and conditions of the installation.
Complete solution
It is not only about the configuration — it is a whole solution
Choosing a canopied or open configuration is an important step — but only one part of the design. A functioning standby system consists of several interconnected elements that must together form a reliable whole.
Whichever configuration you choose, the output, the changeover automation, the fuel tank, service conditions and monitoring always have to be addressed. We design the whole solution as one functional system — not as a sum of separate components.
Output and alternator
Correctly sized output with respect to the total load, starting currents and the required reserve.
ATS — automatic changeover
The automatic transfer switch provides the changeover after engine start and stable voltage; sensitive loads are bridged by a UPS during the brief interruption.
Fuel system
An integrated or external tank sized for the required operating time — runtime depends on the load and the tank.
Acoustic solution
Canopy, sound-attenuated container or acoustic enclosure — depending on the configuration and the requirements of the installation site.
Monitoring and control
Remote access, alarms and an overview of the unit status. Integration into BMS or SCADA as an individual project solution where the operation requires it.
Service and support
Regular maintenance, emergency service and a service contract adapted to the specific operation.
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Czech projects — scope as agreed
For Czech projects the delivery may include, as agreed: generator supply, design of the installation, commissioning on a prepared site, turnkey realization and a service contract. The scope is always clarified together during consultation and confirmed in the quotation.
International supply — EXW CZ/NL
International direct sales are preferably EXW Czech Republic / Netherlands; transport is agreed individually. Installation and service abroad are possible in agreed cases and are always confirmed individually by location and model. Manufacturer warranty.
We will help you choose the right generator configuration
We will propose a suitable solution according to the installation site, operating conditions and the required configuration.