In an era where sustainable energy supply is becoming increasingly important, LG Energy Solution and Fronius offer innovative solutions that go far beyond the standard components of a PV system. With the LG FLEX home storage and the Fronius GEN24 Plus hybrid inverter, demanding homeowners can install a premium system for their private energy transition. In the following article, we explain what makes this system solution special. And if you want detailed information about the LG FLEX, read this article >
LG FLEX and Fronius GEN24 Plus: A Strong Partnership
Fronius Symo GEN24 Plus: The Ideal Solution for Small and Large Private Solar Systems
The Fronius Symo GEN24 3.0 – 5.0 Plus is perfect for smaller solar systems up to 7.5 kWp. For larger systems up to 15 kWp, the Symo GEN24 6.0 – 10.0 Plus is recommended. Both models feature the simple PV-Point emergency power function, which can be upgraded to a 3-phase full-backup function. Open interfaces allow integration of additional components such as the Fronius Wattpilot charging station or third-party components like heat pumps and air conditioners.
Compatibility of LG FLEX Battery Storage
LG FLEX battery storage units are available in various capacities and are compatible with the following Fronius GEN24 Plus models:
- Primo GEN24 3.0 – 6.0 Plus: Compatible with LG FLEX 8.6 / 12.9
- Symo GEN24 3.0 – 5.0 Plus: Compatible with LG FLEX 8.6 / 12.9 / 17.2
- Symo GEN24 6.0 – 10.0 Plus: Compatible with LG FLEX 8.6 / 12.9 / 17.2
Sustainability of Fronius GEN24 Plus Inverters
Fronius has analyzed the lifecycle of GEN24 Plus inverters for a year in collaboration with an external sustainability expert. This analysis, reviewed and certified by the renowned Fraunhofer Institute, confirms the outstanding ecological balance of GEN24 Plus inverters. Moreover, Fronius inverters can be repaired on-site by trained Fronius system partners, further enhancing sustainability. The inverter’s aluminum heat sink is made from 100 percent recycled aluminum.
LG FLEX Premium Storage for GEN24 Plus
For over 30 years, LG Energy Solution has led the battery industry and is globally recognized for high-quality, safe, and reliable batteries. Our expertise is supported by a portfolio of 55,794 patents and supplies to major brands like Volkswagen, Mercedes, and Apple. All this knowledge is incorporated into the LG FLEX. Each FLEX battery is UL9540A-certified, meaning it passes the toughest safety test against thermal runaway, confirming our commitment to your safety. The LG FLEX is not just another battery; it is a comprehensive energy solution tailored to the needs of modern households. With flexible capacity options up to 17.2 kWh, strong discharge performance, and adherence to strict safety standards, the FLEX stands out as a premium system in the highly competitive home storage market.
Planning and Operating Solar Systems with LG FLEX and Fronius GEN24 Plus
Choosing the Right Inverter for Your Roof Area
The selection of the appropriate GEN24 Plus hybrid inverter depends on the available roof area. The 3.0 – 5.0 model is suitable for smaller roof areas, such as those of typical townhouses, with a DC power output ranging from 3 to 7.5 kWp. For larger roof areas, the 6.0 – 10.0 model is suitable for a DC power output between 8 and 15 kWp, ideal for single-family homes or multi-family houses.
Sizing the LG FLEX Storage
The size of the LG FLEX storage depends on the size of the solar system and the power consumption. A general rule is 1 kWp PV output to 1.2 kWh usable storage capacity. For a small solar system with 7.5 kWp, the FLEX 8.6 is suitable. For a larger system with 10 kWp, the FLEX 12.9, and a 15 kWp system fits ideally with the FLEX 17.2. The LG FLEX storage thus perfectly meets the needs of a home solar system.
Increasing Self-Consumption with FLEX Storage
The LG FLEX battery storage can significantly increase self-consumption from the solar system. Typically, self-consumption for solar systems without storage is around 30-40%, with the rest fed into the grid for EEG compensation. With LG FLEX storage, self-consumption can be increased to up to 80%. Consequently, the amount of electricity drawn from the grid and the associated costs are significantly reduced.
Monitoring with the Fronius Solar.web App
With the free Fronius Solar.web app, you can always monitor your energy yield and consumption. The monitoring tool helps optimize energy consumption. For instance, you can control a heat pump or air conditioner or use production data to predict whether to run the washing machine now or in two hours. Dedicated monitoring of the LG FLEX storage is also possible with the RESU Monitor app, where settings can be made directly on the storage.
Keep Your Home Powered During Outages: Backup Solution with GEN24 Plus and LG FLEX
PV-Point Emergency Power Function
The PV-Point is an integrated emergency power function of the GEN24 Plus inverters, which reliably supplies a socket or small consumer circuits with energy in the event of a power outage. This function provides single-phase continuous power up to 3 kW. The connected devices are supplied either from the solar system or, in the absence of sunlight, from the LG FLEX battery storage.
Full-Backup Solution
The full-backup solution of the GEN24 Plus hybrid inverters supplies the entire house single- and three-phase in an emergency, including large consumers like heat pumps. The full output power of the inverter can also be accessed in emergency mode (e.g., 10 kW with the Symo GEN24 10.0 Plus). The LG FLEX battery storage is essential for effectively utilizing the full-backup solution. The household can be conveniently supplied from the storage for several hours without sunlight. If the solar system produces excess power, it can be stored in the FLEX battery while simultaneously powering the household. Those living in areas with frequent power outages can set a reserve in the app to ensure enough power is always available in the storage.
Economical Electric Car Charging with the Fronius Wattpilot and LG FLEX
Smart Charging with the Fronius Wattpilot
The Fronius Wattpilot is a charging station that allows you to charge your electric car with up to 22 kW. A particularly economical and sustainable way to charge the car is with excess PV power. The Wattpilot adjusts the charging power precisely to the available surplus power after household supply. Additional charging modes allow flexible and planned charging. Operation is also carried out in the Solar.web app.
Charging an Electric Car with LG FLEX in the Evening
Charging the electric car can also be done from the LG FLEX battery storage. When you get home from work and the sun is no longer shining, the battery storage can be partially discharged to charge the electric car. The average commute is about 50 km, which requires about 8 kWh for an electric car. These 8 kWh can easily be provided by a FLEX 12.9 or 17.2.
Controlling Heat Pumps with Fronius GEN24 Plus
Integration of the Heat Pump
By integrating an SG-ready heat pump into the energy management of the Fronius GEN24 Plus hybrid inverter, self-consumption from the solar system can be significantly increased. The inverter sends power and feed-in information to the heat pump, indicating when it should charge the hot water storage to utilize as much excess solar power as possible. In addition to a heat pump, an air conditioner can also be connected to the GEN24 Plus in warmer regions.
Powering the Heat Pump from the LG FLEX Storage
A heat pump or air conditioner can also be powered by the LG FLEX storage. The process is the same as for charging the electric car. An app setting can be defined to discharge the storage before drawing power from the grid. Thus, excess stored power can also be used for heating or cooling.
Conclusion
The combination of LG FLEX home storage from LG Energy Solution and Fronius GEN24 Plus hybrid inverters offers a comprehensive solution for modern households committed to sustainable energy supply. Through intelligent integration of solar system, battery storage, charging station, and heat pump, not only is self-consumption maximized, but independence from rising electricity prices is also ensured. Utilize the innovative technology from LG Energy Solution and Fronius to future-proof your energy supply.
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