Indiv. current settings for 1p/3p charging

[bjoernwuest]

Feature request: enable individual min and max current settings for one phase and three phase charging.

Motivation:

• in 1p, I would like to set a min of 10A to reduce charging losses (e.g. basic energy consumption of vehicle in relation to charging power)
• in 3p, I accept a min of 6A to enable PV surplus charging more early

Request: Enable individual min and max current setting for one phase and three phase charging.

Alternatives:

• setting min current to 6A => would result in high charging loss in 1p mode but enable early start of PV surplus charging in 3p mode (i.e. 4.1kW)
• setting min current to 10A => would result in later start of PV surplus charging in 3p mode (i.e. 6.9kW) but reduce loss "ration" in 1p mode