The Plenticoin Card DE from Kostal Solar Electric is a single-purpose voucher valid specifically for Germany. This card allows installers to retrieve activation codes for product extensions in the Kostal Solar webshop via the QR code. The Plenticoin card is a practical accessory that facilitates access to additional functions and extensions for Kostal products. It is not only a voucher, but also a key to extended possibilities in the field of solar energy. The use of this card is simple and user-friendly, making it a valuable addition for any installer.