Victron Phoenix Smart IP43 12/30 1+1 Charger

The Victron Phoenix Smart IP43 12/30 1+1 is a 12V 30A charger with a main house output and a secondary starter-battery output, accepting 120-240V AC.

The 1+1 arrangement is what distinguishes this from a conventional two-bank charger. Almost all the output goes to the house bank, while a small auxiliary output trickles the starter battery. That matches how boats actually use their batteries. The house bank does the work and needs the current; the starter battery only needs keeping topped up.

A conventional two-output charger splits capacity more evenly, which wastes charging current on a starter battery that is already nearly full after every engine start. For a boat with one large service bank and one starting battery, the 1+1 layout puts the capacity where it is needed.

Adaptive charging adjusts to how the battery is used rather than following fixed timing, and Bluetooth gives monitoring and configuration through VictronConnect. Auto-ranging 120-240V AC input works on shore supplies in either region, and IP43 protection suits a protected but not fully sealed installation. Explore more 2-bank battery chargers.

• 1+1 sends most output to the house bank
• The starter battery only needs topping up
• An even split wastes current on a nearly full starter
• 30A at 12V, on 120-240V input