Victron Phoenix Smart IP43 24/16 1+1 Charger

The Victron Phoenix Smart IP43 24/16 1+1 is a 24V 16A charger with a main house output and a secondary starter output, accepting 120-240V AC.

BatterySafe mode is the feature worth understanding here. It limits how fast voltage rises when high current and absorption voltage together would otherwise produce excessive gassing. Gassing loses electrolyte and shortens battery life, and it happens most on a charger sized generously for the bank. BatterySafe is what makes a fast charger safe on a smaller battery.

The adaptive six-stage sequence runs bulk, absorption, recondition, float, storage and refresh, with absorption time varying by discharge depth rather than a fixed timer. Storage mode reduces long-term float voltage to slow corrosion and water loss, then applies a periodic refresh cycle to prevent sulfation.

Automatic voltage compensation offsets losses in the DC cabling as current changes, which matters where the charger sits some distance from the batteries. This model requires a separate 5-15P mains cord for AC input, which is worth ordering at the same time. IP43 suits a protected installation. Explore more 2-bank battery chargers.

• BatterySafe limits voltage rise to prevent gassing
• Excessive gassing loses electrolyte and shortens life
• Six stages including recondition and refresh
• Needs a separate 5-15P mains cord