Wallbox Power Boost Installations- Und Benutzerhandbuch Seite 8

6. Definition of "Max. current per phase"
Max. current per phase: this value is the rated current of the main circuit
breaker (MCB) of your electrical installation. This value determines
the maximum current your installation can withstand. This value can
usually be found marked on the MCB enclosure. For example, a MCB
with rated current of 20 A will usually have the text "C20" or "20A"
marked on it.
Warning: contact your installer in case of doubt about the rated
current of the MCB installed in your property. Only values of Max.
current per phase greater than 6 A are accepted for a correct
performance of the Power Boost functionallity.
8