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SOLAR ENERGY
INSTALLERS & PARTNERS
modules Ukraine

Fronius PV-Genset solution

Save fuel and energy costs with photovoltaics

Diesel generators are widely used in areas with unstable grid supply to guarantee a reliable supply in industrial plants, backup systems and off-grid communities. Combined with photovoltaics, these diesel systems offer great potential for long-term cost savings.
The Fronius PV-Genset solution ensures optimum interaction between the photovoltaics and diesel generator. This saves fuel, lowers energy costs and ensures a stable and reliable power supply.

The advantages of the Fronius PV-Genset solution

  • Coordinated solutions for every solar/diesel hybrid system
  • Low energy costs
  • Short payback period
  • Very easy to integrate into existing systems

Fronius PV-Genset solutions compared

Fronius inverter The inverter converts the direct current from the solar modules into alternating current and provides the PV-Genset system with as much PV energy as possible.
1
Fronius PV System Controller The Fronius PV System Controller measures all power flows in the system, enabling it to control the PV power in the most optimum manner.
2
Diesel generator The diesel generator is the primary energy source in the PV-Genset system. The PV energy takes the load off the diesel generator, which saves fuel costs.
3
Loads Loads are supplied with an optimal mix of PV and conventional (fossil) power by the PV-Genset system
4
Current sensors The current sensors are connected to the PV system controller and measure the power in the system.
5
Grid A connection to the grid can be available – at least temporarily.
6
Backup feedback contact The feedback contact (grid supply) enables the PV system to also be operated in backup applications.
7
1
Fronius inverter
The inverter converts the direct current from the solar modules into alternating current and provides the PV-Genset system with as much PV energy as possible.
2
Fronius PV System Controller
The Fronius PV System Controller measures all power flows in the system, enabling it to control the PV power in the most optimum manner.
3
Diesel generator
The diesel generator is the primary energy source in the PV-Genset system. The PV energy takes the load off the diesel generator, which saves fuel costs.
4
Loads
Loads are supplied with an optimal mix of PV and conventional (fossil) power by the PV-Genset system
5
Current sensors
The current sensors are connected to the PV system controller and measure the power in the system.
6
Grid
A connection to the grid can be available – at least temporarily.
7
Backup feedback contact
The feedback contact (grid supply) enables the PV system to also be operated in backup applications.
Fronius inverter The inverter converts the direct current from the solar modules into alternating current and provides the PV-Genset system with as much PV energy as possible.
1
Automatic Sustainable Controller The Automatic Sustainable Controller communicates with the inverters and diesel generators in the system.
2
Diesel generator The PV-Genset Advanced and Professional solutions are ideal for multi-generator systems in which the generators are automatically switched on and off depending on the load.
3
Loads The consumers are supplied with solar energy by the PV-Genset system.
4
Transformer The PV-Genset Advanced and Professional solutions are also suitable for medium-voltage applications.
5
Grid The PV-Genset Advanced and Professional solutions can also be used for backup applications.
6
1
Fronius inverter
The inverter converts the direct current from the solar modules into alternating current and provides the PV-Genset system with as much PV energy as possible.
2
Automatic Sustainable Controller
The Automatic Sustainable Controller communicates with the inverters and diesel generators in the system.
3
Diesel generator
The PV-Genset Advanced and Professional solutions are ideal for multi-generator systems in which the generators are automatically switched on and off depending on the load.
4
Loads
The consumers are supplied with solar energy by the PV-Genset system.
5
Transformer
The PV-Genset Advanced and Professional solutions are also suitable for medium-voltage applications.
6
Grid
The PV-Genset Advanced and Professional solutions can also be used for backup applications.

Fronius PV-Genset Easy

The Fronius PV-Genset Easy solution is ideal for backup applications with no more than one diesel generator. It ensures permanent stability for the entire system, making the best use of the PV power and not undershooting the minimum load of the diesel generator.

  • Integrate PV systems quickly and easily into existing diesel systems
  • Optimized for low-voltage applications with a diesel generator

FRONIUS PV-GENSET ADVANCED

With the PV-Genset Advanced solution, PV systems can be easily and quickly integrated into diesel systems in which several diesel generators are being used. The Advanced solution is primarily designed as a retrofit solution for multi-generator systems. The controller is the communication interface and assumes perfect control of the entire system. The PV system can thus relieve the workload of the diesel generators as much as possible and save costs. A striking feature of this solution is the combination and compatibility of strong partners such as ComAp, DEIF, Elum or Encombi.

  • The retrofit solution for multi-generator systems
  • Suitable for both low-voltage and medium-voltage applications

FRONIUS PV-GENSET PROFESSIONAL

The PV-Genset Professional is the fully integrated and harmonised solution for multi-generator systems. The controller is the communication interface and assumes perfect control of the entire system. This results in optimum interaction and relieves the workload from the diesel generators in the best possible way through the PV system. A striking feature of this solution is the combination and compatibility of strong partners such as ComAp or DEIF.

  • The fully integrated solution for multi-generator systems
  • Suitable for both low-voltage and medium-voltage applications
inverter Christiana

Maximum energy cost savings

Diesel generators are often associated with high and heavily fluctuating costs – which depend on the price of oil, transport costs and taxes. Depending on the region, the oil price is currently up to €2.5/KWh. In contrast, the cost of photovoltaics has fallen steadily in recent years and currently stands at €0.10/kWh on average worldwide.

As soon as the levelized cost of energy of a photovoltaic system undercuts those of a diesel generator, a PV-Genset system is a worthwhile investment.

The Fronius PV-Genset solution means we can make a significant contribution to saving energy costs, because every diesel kWh saved saves cash. As an installer, you can therefore impress your customers with a short payback period and low energy costs in the long term.  

modules in Christiana

Intelligent control of the PV-Genset system

To ensure stable operation of the PV-Genset system, optimal control of the integrated components is essential. The Fronius PV System Controller is one of the elements responsible for this. It ensures the system runs smoothly, guarantees reliable yields and maximum energy cost savings.

The open structure also allows third-party components to be easily integrated into the system. Thanks to the Fronius Datamanager 2.0, Fronius components can be integrated into a control system with Modbus RTU or via TCP with the SunSpec Inverter Control Model.

The pV Genset solution in action

modules in Zimbabwe

PV Genset system in Simbabwe

A tobacco factory in Zimbabwe has been using a PV system coupled with a 150 kVA diesel generator for several years. Following the completion of a capacity upgrade project, the system will ultimately be able to save up to 60 % in their previous daily fuel usage, which could work out to as much as 100 litres of fuel a day or more. The system was installed and commissioned by local Fronius System Partner James Davy, supported by OneStopSolar.

To the reference

Offgrid & backup conference

The conference, which was hosted by Fronius and it's partners, was an event about offgrid and backup solutions with the focus on Africa and South-­America area.

Proven solutions but also interesting success stories around the world were presented during this event. Moreover, a special invited guest for the conference, Dr. Thomas Hillig, who is an industry professional on rural electrification, provided an Insight into the market and pointed out the high potential of this sector. 

Catch up on the event

Member of the Alliance for Rural Electrification (ARE)

Fronius is the first grid-connected inverter manufacturer to join ARE! The alliance's vision is that by 2030 everyone in the world will have access to affordable, secure and clean energy and energy services.

We at Fronius are proud to support this goal together with 185 other members from 55 countries and 3 continents!

More information about ARE

Technical data



Integrating photovoltaic systems into diesel generator-powered grids requires quick and reliable control of the entire system. The Fronius PV System Controller measures all power flows in the system, enabling it to control the PV power in the most optimum manner.

To provide additional protection for the generator, the Fronius measurement extension can be used as a quick reverse-power protection measure to perform an emergency shutdown.

Technical data


The Fronius PV-Genset Advanced and Professional solutions are optimized for systems in which several diesel generators are being used. The solutions are suitable for both low-voltage and medium-voltage applications. Power outputs in the multi-megawatt range are therefore also possible.

Technical data

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