Victron energy Phoenix Multi Compact 12 / 800 / 35 Bedienungsanleitung, Montageanleitung Seite 16

3.6 Optional Connections
A number of optional connections are possible:
Undo the four screws at the front of the enclosure and remove the front panel.
3.6.1 Second Battery
The Phoenix Multi Compact / MultiPlus Compact has a connection for charging a starter
battery. For connection see appendix 1
13