
VARTA battery storage VARTA.wall and KOSTAL inverter PLENTICORE G3
Strong partners. Strong performance. Made in Germany.

Cooperation between KOSTAL and VARTA: A success story for modern energy systems
The collaboration between KOSTAL and VARTA is a significant step towards smart energy management solutions. Both companies stand for German engineering expertise and innovative strength in the field of renewable energies. KOSTAL Solar Electric, a leading supplier of inverters, and VARTA, a pioneer in battery technology, have joined forces to develop a solution that optimises both energy production and storage for homes and businesses. This cooperation enables the perfect combination of KOSTAL inverters with VARTA battery storage systems, especially the popular VARTA.wall.
Through this partnership, customers benefit from seamless integration, high efficiency and intelligent control that maximises self-consumption of solar power and significantly increases self-sufficiency. KOSTAL and VARTA are pursuing a common goal: to make the energy transition as simple and economical as possible for end consumers. The products of these two brands harmonise perfectly. The KOSTAL PLENTICORE G3 inverter in combination with the VARTA.wall is not only powerful, but also offers extremely user-friendly control and maximises the benefits of the photovoltaic system. This solution is ideal for homeowners who want to optimise their own electricity consumption and become less dependent on grid power.
Compatibility of PLENTICORE G3 and VARTA.wall: a perfect symbiosis
The KOSTAL PLENTICORE G3 inverters and the VARTA.wall battery storage system are specially designed for use in photovoltaic systems to ensure maximum efficiency and compatibility. The inverter ensures that the direct current generated by the solar system is converted into alternating current that can be used in the household or fed into the grid. At the same time, the PLENTICORE G3 monitors the energy flows and decides whether surplus electricity should be channelled into the VARTA battery storage system or consumed immediately.
The VARTA.wall is an intelligent battery storage system that has been specially developed to meet the requirements of modern PV systems. The collaboration with KOSTAL has enabled seamless integration so that the storage system communicates perfectly with the inverter. This ensures smooth operation and optimum utilisation of the solar power. Customers can therefore be sure that both systems work together harmoniously and always find the best solution for their own energy requirements. The result is an increased self-consumption rate and therefore a significant reduction in energy costs. Thanks to the compatibility of the PLENTICORE G3 with the VARTA.wall, users benefit from a flexible and future-proof solution that remains stable even with rising energy prices and changes in the energy industry.
Features of the PLENTICORE G3: Advanced technology for modern energy management systems
The KOSTAL PLENTICORE G3 inverter is a true masterpiece of engineering and boasts numerous functions that have been specially developed for use in photovoltaic systems. The PLENTICORE G3's outstanding features include:
1. Three MPP trackers: The inverter has three independent MPP trackers (Maximum Power Point), which ensure that the PV system delivers maximum power at all times, even with different roof orientations or shading.
2. Power expansion: The inverter is available for different power ranges, making it attractive for both smaller and larger PV systems. This means that the PLENTICORE G3 can be optimally customised to individual requirements. It is available as model S with 4 kW and can be expanded up to 5.5 kW or 7 kW. The M model is between 8.5 and 12.5 kW and the L model 15 to 20 kW.
3. DC overvoltage protection: The PLENTICORE is fully equipped for all modern solar system requirements. This also applies to all the safety features of our 'Made in Germany' inverter. This is also ensured by the integrated DC overvoltage protection (type 2) in the PLENTICORE. This can be easily inserted into the PLENTICORE as an optional plug-in module. The DC overvoltage protection provides the necessary protection against induced overvoltages that can penetrate from the solar module side.
4. KOSTAL BackUp Switch for backup power function: The third generation of the PLENTICORE also has a backup power function. In conjunction with the KOSTAL BackUp Switch and a connected battery storage unit, the supply is secured in the event of a power failure - independent of the mains. And this is how it works: The KOSTAL BackUp Switch is installed as a manual switch on the top-hat rail in the sub-distribution board at the mains connection point. The low installation effort makes installation and handling extremely simple. In the event of a power failure, the KOSTAL BackUp Switch switches manually to backup power and generates electricity from its own solar system and the connected battery storage unit.
5. Connectivity: Thanks to the integrated communication interfaces such as WLAN and Ethernet, the PLENTICORE G3 can be easily integrated into smart home systems. This enables convenient control and monitoring of energy consumption via an app or web portal.
Features of the VARTA.wall: The flexible battery storage system for your photovoltaic system
The VARTA.wall is a state-of-the-art battery storage system that has been developed for use in private and commercial photovoltaic systems. Thanks to the close cooperation with KOSTAL, the VARTA.wall offers maximum compatibility with KOSTAL inverters and impresses with the following features:
1. High storage capacity: The VARTA.wall is available in different capacities so that the right size can be selected for every energy requirement - the VARTA.wall offers the necessary flexibility.
2. Modular design: The VARTA.wall can be easily expanded if the energy requirement changes. This makes it a future-proof solution that grows with your requirements.
3. Intelligent energy management: The storage system works seamlessly with the PLENTICORE G3 and stores surplus solar power for times when the sun is not shining. This maximises self-consumption and minimises dependence on the public grid.
4. High efficiency: The VARTA.wall is one of the most efficient battery storage systems on the market. This means that the majority of the stored electricity can actually be used.
5. Space-saving design: The compact design of the VARTA.wall enables flexible installation, even where space is limited. Thanks to these features, the VARTA.wall in combination with a KOSTAL inverter is an ideal solution for all those who want to maximise their self-consumption and increase their energy self-sufficiency. Its depth is only 10 cm.
Sector coupling: more than just storing electricity
A significant advantage of the combination of KOSTAL and VARTA is the possibility of sector coupling. This term refers to the intelligent linking of electricity, heat and mobility. With a KOSTAL inverter and a VARTA battery storage system, the solar power generated can be used not only for self-consumption in the household, but also for charging an electric car or for heating water. Sector coupling takes the utilisation of your own energy production to a whole new level. Surplus solar power can be fed into the heating system or used to charge an electric car, for example. This leads to a significant increase in self-sufficiency and makes homeowners less dependent on fossil fuels.
Made in Germany: quality and reliability
Both KOSTAL and VARTA stand for the highest quality "Made in Germany". The products of both companies are developed and produced according to strict German quality standards. This not only guarantees a long service life, but also a high level of reliability. Customers can rest assured that the systems will function reliably for many years and reduce energy costs. In addition, KOSTAL and VARTA offer extensive guarantees on their products. This emphasises the trust that both companies place in their technologies.
Self-sufficiency: independence through self-consumption
One of the main aims of many homeowners who invest in a photovoltaic system with storage is to increase their self-sufficiency. The combination of KOSTAL PLENTICORE G3 and VARTA.wall offers an ideal solution here. By storing the self-generated solar power, self-consumption can be maximised and dependence on the power grid can be significantly reduced. With a battery storage system such as the VARTA.wall, you can store the surplus solar power and use it at a later time, for example in the
evening hours or on cloudy days. This means that less electricity has to be drawn from the public grid, which reduces energy costs and increases self-sufficiency.
A high level of self-sufficiency also means greater independence from rising electricity prices. Homeowners who produce and store their own electricity are significantly less affected by fluctuations on the energy market. This makes investing in a PV system with a battery storage system a worthwhile and future-proof decision.
The cooperation between KOSTAL and VARTA and the perfect integration of PLENTICORE G3 and VARTA.wall offer a pioneering solution for all those who rely on renewable energies and want to maximise their energy independence. The combination of German engineering, high efficiency and advanced technology ensures that you benefit from lower energy costs and greater self-sufficiency in the long term.
You can find the current status of all compatibilities here.