Victron Skylla-IP65 Battery Charger: Setup & Wiring

Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 1 source · Method ↗

Victron Skylla-IP65 Battery Charger: Setup & Wiring — SolarNevs spec card

Key Takeaways

  • The Victron Skylla-IP65 line comprises Skylla-IP65 12/70 24/35 heavy-duty battery chargers in IP65 splashproof aluminum casings.
  • Operates on universal utility and generator supplies: Input voltage (VAC) 120 – 240 nominal with a broad Input voltage range (VAC) (1) 90 – 265 across Frequency (Hz) 45-65.
  • Incorporates active power factor correction with a Power factor 0,98 for maximum electrical efficiency.
  • Delivers robust output current: Charge current main batt. (A) (3) 70 35 for 12V and 24V primary storage banks.
  • Features a dedicated auxiliary trickle charge output: Charge current starter batt. (A) (4) 3 4 for engine starter batteries.
  • Implements an intelligent multi-stage charge algorithm: Charge curve, lead-acid 7 stage adaptive with specialized lithium profiles.
  • Facilitates synchronized multi-unit paralleling via CAN bus communication port Two RJ45 connectors, NMEA2000 protocol.
  • Provides remote alerting with a Remote alarm relay DPST AC rating: 240 VAC/4A DC rating: 4A up to 35 VDC, 1 A up to 60 VDC.
  • Engineered for extreme maritime and industrial temperatures: Operating temp. range -20 to 60 °C (full output current up to 40 °C).

AC Power Architecture & Dual-Bank Outputs

The Skylla-IP65 is engineered for harsh marine engine rooms, remote industrial plants, and off-grid generator systems. Its water-resistant, corrosion-proof aluminum enclosure protects internal power electronics against salt mist, condensation, and chemical dust.

The Victron Skylla-IP65 is an IP65 marine and industrial charger (models 12/70 and 24/35) with universal 90 - 265 VAC input (45-65 Hz, 0.98 Power Factor):

  • Main Battery Output: 70A (12V Model), 35A (24V Model), 7-Stage Adaptive, Full Power to 40°C.
  • Starter Output: 3A (12V Model), 4A (24V Model), Isolated Trickle, Keeps Crank Full.
  • Control & CAN: Dual RJ45 CAN, NMEA2000 Bus, DPST Relay, LCD Display.

Electrical Wiring & Isolated Starter Port

  1. Universal Mains Supply: Connect single-phase mains to the internal AC screw terminals. The charger accepts Input voltage (VAC) 120 – 240 and tolerates severe brownouts down to Input voltage range (VAC) (1) 90 – 265 across Frequency (Hz) 45-65.
  2. Primary Bank Connection: Wire the service battery bank to the main output studs, delivering Charge current main batt. (A) (3) 70 35.
  3. Auxiliary Starter Output: Connect the engine starting battery to the isolated starter terminal (Charge current starter batt. (A) (4) 3 4), maintaining starting readiness without risk of cross-discharging the house bank.

CAN Bus Paralleling & Remote Alarm Relay

The Skylla-IP65 combines sophisticated communication and automation interfaces:

  • Synchronized Paralleling: Linking multiple Skylla-IP65 units via CAN bus communication port Two RJ45 connectors, NMEA2000 protocol automatically synchronizes charging stages, ensuring all paralleled units switch from bulk to absorption and float in perfect unison.
  • Adaptive 7-Stage Charging: The Charge curve, lead-acid 7 stage adaptive process includes bulk, battery safe, absorption, automatic equalization, float, storage, and weekly refresh modes to maximize battery lifespan.
  • Alarm Relay: The onboard Remote alarm relay DPST AC rating: 240 VAC/4A DC rating: 4A up to 35 VDC, 1 A up to 60 VDC triggers external sirens, indicator lights, or generator shutdown switches during fault states.
  • Thermal Performance: Functions across Operating temp. range -20 to 60 °C (full output current up to 40 °C), automatically derating power above 40°C to protect components.

Technical Specifications & Connectivity

Parameter

Engineering Rating

Design Significance

Model Hierarchy

Skylla-IP65 12/70 24/35

Available in 12V 70A and 24V 35A configurations

AC Input Operating Window

Input voltage range (VAC) (1) 90 – 265 (45-65 Hz)

Handles unstable generator and shore power voltages

Mains Efficiency

Power factor 0,98

Minimizes apparent power draw from generators

Primary Output Current

Charge current main batt. (A) (3) 70 35

High-speed recharging for deep-cycle banks

Starter Trickle Output

Charge current starter batt. (A) (4) 3 4

Independent maintenance of engine starting batteries

Network Bus

CAN bus communication port Two RJ45 connectors, NMEA2000 protocol

Marine network and multi-charger synchronization

Remote Switching

Remote alarm relay DPST AC rating: 240 VAC/4A DC rating: 4A up to 35 VDC, 1 A up to 60 VDC

Hardware-level alarm contact signaling

Operating Temperature

Operating temp. range -20 to 60 °C (full output current up to 40 °C)

Reliable thermal envelope for marine engine rooms

Frequently asked questions

What models and AC input voltage ranges are supported by the Skylla-IP65?

The charger is available in **Skylla-IP65 12/70 24/35** variants with **Input voltage (VAC) 120 – 240** and a wide **Input voltage range (VAC) (1) 90 – 265** across **Frequency (Hz) 45-65** with a **Power factor 0,98** (August 2026).

What charge currents are delivered to the main and starter batteries?

It delivers **Charge current main batt. (A) (3) 70 35** to the house bank and **Charge current starter batt. (A) (4) 3 4** to the engine starting battery (August 2026).

What charging algorithm and communication protocols does the Skylla-IP65 use?

It utilizes a **Charge curve, lead-acid 7 stage adaptive** profile and integrates a **CAN bus communication port Two RJ45 connectors, NMEA2000 protocol** (August 2026).

What remote alarm ratings and temperature operating limits apply?

It includes a **Remote alarm relay DPST AC rating: 240 VAC/4A DC rating: 4A up to 35 VDC, 1 A up to 60 VDC** and operates across **Operating temp. range -20 to 60 °C (full output current up to 40 °C)** (August 2026).

References

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