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At a glance – KOSTAL
KOSTAL Solar Electric was founded in 2006 as a subsidiary of KOSTAL Industrie Elektrik and is now part of the KOSTAL Group. Specializing in photovoltaics from the outset, KOSTAL Solar Electric has established itself as one of the leading suppliers of inverters for residential and commercial PV systems, as well as EV chargers, battery storage systems and energy management solutions.
Development and production take place in Germany, reflecting high standards of quality, reliability and product safety. With eight additional locations across Europe, KOSTAL Solar Electric provides comprehensive service and support close to its customers.
Projects with KOSTAL 
News
KOSTAL begins sales of the PLENTICORE BI 25 battery inverter
KOSTAL is expanding its portfolio with the PLENTICORE BI 25. The AC-coupled battery inverter with a power rating of 25 kW is designed particularly for larger battery storage solutions in commercial applications and demanding residential installations. Three battery connections, three-phase backup power and integration into connected KOSTAL systems provide specialist partners with flexible options for both new installations and retrofitting existing PV systems.
KOSTAL honoured as test winner of the HTW electricity storage inspection 2026
In the 2026 electricity storage inspection by HTW Berlin, KOSTAL achieved test victory in the 10 kW class (AC-coupled) with the PLENTICORE G3 M 10 in combination with the BYD Battery-Box Premium HVS 12.8. The independent study thus confirms the high system efficiency and performance of the KOSTAL storage system in the demanding application environment of modern residential buildings.
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Why KOSTAL?
Innovative power and charging electronics with production and development in Germany
Intelligent and sustainable solutions for energy generation, management, and utilization
Over 112 years of experience from the KOSTAL Group
Maximum flexibility and future-proofing thanks to inverters with expandable power and functionality (PLENTICORE)
Latest Products
PLENTICORE G3 universal inverter (three-phase)
- The world's first and only inverter with expandable power and functionality
- Covers a total of 27 application areas with 3 base devices and power classes
- Simple and reliable backup power function on all three phases with minimal installation effort
- First and compact hybrid inverter up to 20 kW made in Germany, offering strong charging and discharging capabilities
PIKO CI 100 project inverter
- Input currents up to 20 A (per string) and up to 40 A (per MPP tracker) possible
- The PIKO CI app enables simple and convenient on-site commissioning
- Protection class IP 66 and type 2 surge protection (integrated and replaceable) on the AC and DC sides ensure safe operation
- The integrated KOSTAL Smart AC Switch replaces the external coupling switch, reducing costs
ENECTOR AC 3.7/11 wallbox G2 / G2 MID
- Charging capacities up to 3.7 kW (single-phase) or 11 kW (three-phase)
- Pre-wired, ready to connect, and easy to install outdoors (IP54 protection, 7.5 m cable)
- The display with 4 LEDs clearly shows important status and event information
- Additional functions can be activated via the KOSTAL Smart Energy Meter and activation code
Link: Product website (G2)
Link: Product website (G2 MID)
Link: Product datasheet
KOSTAL Smart Energy Meter G2/G3
- By multiple-inverter connection, the intelligent control system ensures optimal power generation for all KOSTAL inverters
- Dynamic active power control ensures grid-compliant feed-in while accounting for household consumption
- Data is collected and transmitted in real time via standard interfaces – around the clock
KOSTAL PLENTICORE G3 Inverter for Photovoltaic Systems
KOSTAL PIKO CI 100 Inverter for Commercial PV Systems
