Victron Energy PSC125051095 Phoenix Smart IP43 Charger 12/50(1+1) 120-240V

Victron Energy Phoenix Smart IP43 12/50(1+1) 50A to the House Bank. Starter Battery Maintained. One Connection.

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Product Overview

The Victron Energy Phoenix Smart IP43 12/50(1+1) (PSC125051095) is a professional-grade, Bluetooth-enabled dual-output 12V battery charger delivering up to 50 amps to a primary house or service battery bank, with a dedicated secondary output maintaining a starter battery at a low, safe maintenance current all from a single shore power connection.

The (1+1) configuration serves the most common marine and large vehicle dual-battery scenario: a large house bank that needs the full force of a 50-amp adaptive charge cycle, and a starter battery that simply needs to stay ready. At 50A primary output, this is a serious charger for serious house banks suitable for liveaboards, large motorhomes, commercial vessels, and off-grid installations where a 25A or 30A unit would extend charge times unacceptably. The 6-stage adaptive algorithm Bulk, Absorption, Recondition, Float, Storage, and Refresh manages the full charge lifecycle of the primary bank including extended layup periods on shore power, while BatterySafe mode protects against gassing damage when charging at maximum current with elevated absorption voltage. Bluetooth connectivity via VictronConnect, a VE.Direct interface for Cerbo GX integration, remote on/off for BMS control, and VE.Smart Network support for synchronised multi-charger operation complete the professional feature set.

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Key Specifications

• Part Number: PSC125051095
• Charger Type: Adaptive dual-output AC-DC battery charger
• Output Voltage: 12V
• Output Configuration: (1+1) — one full-current primary output + one low-current secondary output
• Primary Output: Up to 50A (full rated current — house/service bank)
• Secondary Output: Low-current maintenance (starter battery — exact current not confirmed in this brief; confirm with supplier)
• Input Voltage: 120–240V AC
• Charge Algorithm: Adaptive 6-stage — Bulk, Absorption, Recondition, Float, Storage, Refresh
• BatterySafe Mode: Yes (confirmed across Phoenix Smart range — confirm for this model from datasheet)
• Battery Compatibility: Lead acid (all types), LiFePO₄ lithium
• Pre-Programmed Algorithms: 3 (selectable via mode button)
• Fully Programmable: Yes — via Bluetooth or VE.Direct
• Bluetooth: Built-in (VictronConnect app — iOS and Android)
• External V/Temp Sensing: Confirm — Smart Battery Sense or BMV-712 Smart (confirmed on PSC125053095; verify for this model)
• VE.Smart Network: Confirm — synchronised charging (confirmed on PSC125053095; verify for this model)
• VE.Direct Interface: Yes
• Remote On/Off: Yes — H and L terminals
• Programmable Relay: Yes — active during AC connection only
• Automatic Voltage Compensation: Yes
• Storage Mode: Yes — activates after 24hr without discharge; weekly equalisation
• IP Rating: IP43
• Input Frequency: Not specified — confirm with supplier
• Dimensions: Not specified — confirm with supplier
• Weight: 4.0 kg
• Efficiency: Not specified — confirm with supplier

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Features & Benefits

• 50A Primary Output — Full Power to the House Bank — At 50A, the primary output is sized for large 12V house banks where a lower-rated charger would extend shore power charging times impractically. Suitable for banks from 250Ah upward where 10–20% charge rate guidance applies, and for vessels and motorhomes where overnight or between-use charging windows must fully recover a large bank.
• (1+1) Configuration — Asymmetric Design for Asymmetric Needs — The primary output delivers the full 50A rated current through a complete 6-stage adaptive charge cycle. The secondary output provides a low maintenance current to keep the starter battery fully topped up without consuming house bank current or risking overcharge. This is the correct configuration when one large bank needs serious charging and a starter battery needs maintenance — not when both banks need significant current simultaneously.
• Adaptive 6-Stage Charge Algorithm — Bulk, Absorption, Recondition, Float, Storage, Refresh — Six stages managing the complete charge and maintenance lifecycle. Bulk maximises charge speed. Absorption prevents overcharge while completing the charge. Recondition recovers sulphated lead acid batteries. Float safely maintains a full bank. Storage Mode reduces float voltage to 2.2V/cell after 24 hours without discharge, minimising electrolyte gassing and plate corrosion during layup. Refresh periodically brings the battery back to full charge from Storage Mode, preventing capacity drift during extended shore power periods.
• BatterySafe Mode — Automatically limits the rate of voltage rise when a high charge current and high absorption voltage are combined, once the battery approaches its gassing voltage. At 50A, the gassing risk during aggressive charging is elevated — BatterySafe is an important protection at this output level, preventing plate damage and electrolyte loss without interrupting the charge cycle.
• Variable Absorption Time — Absorption duration adapts to discharge depth. Shallow discharges trigger short absorption to prevent overcharge. Deep discharges trigger extended absorption to ensure full recovery. Automatic, requiring no manual intervention.
• Storage Mode — Long-Term Battery Protection — Activates automatically after 24 hours without a discharge event. Float voltage drops to 2.2V/cell (13.2V for 12V) to minimise gassing and positive plate corrosion. A weekly equalisation pulse at absorption voltage prevents electrolyte stratification and sulphation. For a large house bank on seasonal shore power, Storage Mode is the feature that preserves the battery investment across months of layup.
• LiFePO₄ Lithium Battery Support — LiFePO₄ profiles configurable via Bluetooth or VE.Direct. BMS charge control via remote on/off H/L terminals — the BMS connects a relay or open-collector output to halt charging when required. Full voltage and current control also achievable via Bluetooth.
• Built-In Bluetooth — VictronConnect App — Monitor real-time charge status, configure battery profiles, set alarms, and update firmware from any iOS or Android device without additional hardware.
• VE.Direct Interface — Wired connection to Victron Cerbo GX, Colour Control GX, or PC for full system integration and VRM remote monitoring.
• Remote On/Off — H/L Terminal — External charger control via switch, relay, or open-collector optocoupler. Terminal H pulled high or Terminal L pulled low. Supports BMS charge management and panel switch control.
• Programmable Relay — User-configurable to activate on alarm, charge complete, or other defined events via VE.Direct or Bluetooth. Active only while connected to AC power.
• Automatic Voltage Compensation — Compensates for resistive voltage drop over DC cable runs by proportionally increasing output voltage with current. Ensures correct charge voltage at the battery terminals regardless of cable length.
• Wide 120–240V AC Input — Accepts Australian 240V and North American 120V shore power without manual selection. Suitable for vessels and vehicles used internationally.

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Technical Specs

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Compatible With / Goes Well With

Primary Applications:

• Large marine vessels — 12V house bank and separate 12V start bank
• Liveaboard and charter vessels with significant 12V house battery capacity
• Large motorhomes and campervans with 12V house and chassis starter battery
• Commercial vehicles and off-grid installations with large 12V primary banks

Battery Types:

• All lead acid chemistries — flooded, AGM, gel (12V)
• LiFePO₄ lithium (12V primary bank) — BMS integration via remote on/off

External Sensing Accessories (confirm compatibility):

• Victron Smart Battery Sense (wireless battery voltage and temperature sensing)
• Victron BMV-712 Smart (battery monitor with wireless sensing)

System Integration:

• Victron Cerbo GX (via VE.Direct)
• Victron SmartShunt or BMV-712 (battery monitoring)
• Victron VictronConnect app (free — iOS and Android)

Also Consider:

• PSC125053095 — Phoenix Smart IP43 12/50(3): same 50A rating with three independent full-current outputs for three-bank systems
• PSC242551095 — Phoenix Smart IP43 24/25(1+1): (1+1) configuration at 24V

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Weight

4.0 kg

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Frequently Asked Questions

When should I choose the (1+1) over the (3) at the same 50A rating?

Choose (1+1) when your primary house bank is large and needs the full 50A charge output, and your second bank is a starter battery requiring only maintenance current. Choose (3) when you have three banks each needing meaningful charge current — for example, house, bow thruster, and generator start — where each bank may need tens of amps during bulk charging.

What is the Refresh stage in the 6-stage algorithm?

Refresh re-initiates a full charge cycle on a battery held in Storage Mode, periodically returning it to 100% state of charge from the reduced Storage float voltage. This prevents gradual capacity drift that can occur if a battery is maintained at reduced voltage for extended periods without a complete recharge — important for house banks left on shore power across long layup seasons.

At 50A primary output, does this charger charge the house bank faster than a 25A model?

Yes — assuming the house bank can accept 50A without exceeding its recommended charge rate. As a general guide, lead acid batteries accept charge at 10–20% of their Ah capacity. A 50A charger is appropriate for banks of 250Ah and above. For smaller banks, a 25A or 16A model may provide a more appropriate charge rate.

Can the charger's Bluetooth communicate with a remote battery sensor for more accurate charging?

Confirm from the datasheet for this specific model. The PSC125053095 (3-bank, 50A) confirms this feature via Smart Battery Sense or BMV-712 Smart — verify whether it also applies to this (1+1) variant before specifying.

Can I use this charger with a lithium LiFePO₄ house bank and a lead acid starter battery?

Yes — the primary output supports LiFePO₄ profiles configurable via Bluetooth, with BMS control via the remote on/off terminals. The secondary output maintains the lead acid starter battery at its own lower maintenance voltage. Confirm the exact secondary output voltage from the datasheet to verify it is appropriate for your lead acid starter battery chemistry.