Grid Changeover Box for Kostal Plenticore G3 Backup Power – enwitec
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Backup power for the PLENTICORE G3 – the enwitec grid changeover box for Kostal
The KOSTAL PLENTICORE G3 is backup-capable – but only the right changeover device turns this into a safe home power supply during a power cut. enwitec supplies the grid changeover box officially approved and listed by KOSTAL for all PLENTICORE G3 variants: in the event of a power cut it automatically disconnects the system from the public grid and keeps supplying your loads from PV and battery.
Ready to connect and flexibly configurable
The box comes pre-assembled and pre-tested – no time-consuming DIY build and no need to take on the warranty yourself. KOSTAL energy meters (KSEM, KEM-C or KEM-P) can optionally be integrated directly; on request, the PLENTICORE G3 itself can also be connected in the box, with seven DIN module spaces for circuit breakers and RCDs to be supplied on site.
Layperson-operable and well thought out
Installed circuit breakers are designed for operation by laypersons; if required, the consumer circuits can be split into loads with and without backup support – so the backup capacity is reserved for your important appliances.
Frequently asked questions about the Kostal grid changeover box
Which inverters is the box compatible with?
With all KOSTAL PLENTICORE G3 variants – the enwitec solution is officially approved and listed by KOSTAL. Changeover in the event of a power cut is automatic, and the maximum thermal throughput is 20 kW.
Can the KOSTAL Smart Energy Meter be installed?
Yes, KSEM, KEM-C and KEM-P can optionally be integrated – KOSTAL lists compatible meters in its download area.
Who installs the box?
Only trained, qualified electricians in accordance with the enwitec installation instructions; acceptance of the changeover device must be clarified with the grid operator.
Family tradition meets engineering excellence
Founded in 2007, we are a family-owned business that has been setting standards in portable power for almost two decades. What started as a small vision has grown into one of the most trusted names for professionals and discerning private customers alike.
With us, you're not just buying a product – you're getting a promise. In our in-house certified service workshop in Germany, every unit is thoroughly tested before it ships. And our team of experts is there for you long after your purchase – personal, knowledgeable and on hand whenever you need us.
- 2007
- Founded
- In-house
- Service & workshop

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