Fronius Multi Flow Technology

Energy flow management

woman is checking her device

Intelligent energy flow management for photovoltaic systems 

It’s one thing to store solar energy for 24/7 use, but it’s another to seamlessly combine the output of a PV system, battery, and other power sources. Our Multi Flow Technology—featuring intelligent energy control for maximum self-consumption and optimum utilization of the storage system—masters this challenge with ease.

The direct current flows from the PV modules to the inverter, which converts it into alternating current. You can use the solar power to supply loads in the household and charge the battery. Surplus PV electricity can be fed into the grid if desired.
Household loads can simultaneously draw the electricity they need from both the PV modules and the battery storage system.
If there is surplus PV energy, it is used to supply the loads and charge the battery at the same time. When the energy consumption is higher than the yield, the solar modules and the battery storage system cover the energy needs.
The inverter can use energy from multiple AC sources to charge the battery. In addition to the PV modules, you can also integrate additional energy sources such as a wind turbine into the system.
The inverter converts the direct current from the PV modules into alternating current and manages all energy flows within the photovoltaic system.
Benefits of Multi Flow Technology
Lower energy costs
Multi Flow Technology enables simultaneous energy flows in all directions. The amount of electricity drawn from the grid, and consequently electricity costs, are reduced.
Secure power supply
If the public power grid fails, Multi Flow Technology ensures a parallel energy supply from the PV modules and the battery. When the sun is shining, the photovoltaic system continues to supply energy even when the battery storage system is already discharged.
PV system can be expanded at any time
Battery storage systems and hybrid inverters can be easily retrofitted at any time, even to complement an existing inverter. Thanks to Multi Flow Technology, the hybrid inverter takes over the energy distribution between the PV modules, energy storage device, and loads.
Lower energy costs
Multi Flow Technology enables simultaneous energy flows in all directions. The amount of electricity drawn from the grid, and consequently electricity costs, are reduced.
Secure power supply
If the public power grid fails, Multi Flow Technology ensures a parallel energy supply from the PV modules and the battery. When the sun is shining, the photovoltaic system continues to supply energy even when the battery storage system is already discharged.
PV system can be expanded at any time
Battery storage systems and hybrid inverters can be easily retrofitted at any time, even to complement an existing inverter. Thanks to Multi Flow Technology, the hybrid inverter takes over the energy distribution between the PV modules, energy storage device, and loads.

The ideal products

Benefit from Multi Flow Technology with the following Fronius inverters.

Fronius GEN24 & GEN24 Plus
Want flexible use of your solar energy even during power outages? Then installing the Fronius GEN24 as the heart of your PV system is the way to go. With the Fronius GEN24 Plus, you can even enjoy 24 hours of sun in your home, because this hybrid inverter supports battery connection, increasing your overall energy independence.
Fronius Verto Plus
The powerful Fronius Verto Plus is an excellent fit for agricultural operations, small businesses, large family homes, and multi-unit residential buildings. It easily handles complex roof layouts, varying module orientations, and mixed module types. When combined with a battery storage system, it increases your independence from the grid, and its integrated backup power function ensures you stay powered even during a blackout.
The AC charging function
Even more flexibility for the energy storage system
Integrate additional energy sources
The AC charging function allows additional energy sources, such as micro-combined heat and power units or wind turbines, enabling their surplus energy to be used for charging the battery For a reliable energy supply—even in winter.
Use time-dependent electricity tariffs
More and more utilities are supplying their electricity according to time-of-use tariffs. The AC charging function allows PV system owners to charge their energy storage device with electricity from the grid at low tariff times. At peak tariff times, the home is powered by the low-cost energy stored in the battery.
Protection in the event of a power outage
The AC charging function ensures that the energy storage system always maintains a defined minimum charge level, guaranteeing you have reserve energy in the event of a power failure. If a grid shutdown is imminent, system owners can charge their battery storage in advance.
Conservation charging
Use the AC charging function to protect your battery storage system from deep discharge and extend its service life. This becomes especially important when little to no solar energy is available for an extended period, for instance when the PV system is not functioning properly.
Improve the quality of the grid
Photovoltaic storage systems with AC charging actively support grid stability by charging during high feed-in periods, thereby reducing strain on the grid.
Integrate additional energy sources
The AC charging function allows additional energy sources, such as micro-combined heat and power units or wind turbines, enabling their surplus energy to be used for charging the battery For a reliable energy supply—even in winter.
Use time-dependent electricity tariffs
More and more utilities are supplying their electricity according to time-of-use tariffs. The AC charging function allows PV system owners to charge their energy storage device with electricity from the grid at low tariff times. At peak tariff times, the home is powered by the low-cost energy stored in the battery.
Protection in the event of a power outage
The AC charging function ensures that the energy storage system always maintains a defined minimum charge level, guaranteeing you have reserve energy in the event of a power failure. If a grid shutdown is imminent, system owners can charge their battery storage in advance.
Conservation charging
Use the AC charging function to protect your battery storage system from deep discharge and extend its service life. This becomes especially important when little to no solar energy is available for an extended period, for instance when the PV system is not functioning properly.
Improve the quality of the grid
Photovoltaic storage systems with AC charging actively support grid stability by charging during high feed-in periods, thereby reducing strain on the grid.

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