Victron Energy Skylla-TG Battery Charger (24V & 48V, 25-100A)

The Skylla-TG is Victron's classic, no-nonsense high-current charger line — ideal for blue-water cruisers, commercial vessels, and industrial DC systems. A microprocessor-controlled IUoUo 3-stage algorithm charges fast while protecting your batteries, and the metal IP21 chassis with forced-air cooling is made to run hard in hot engine rooms. With fully adjustable set-points, temperature compensation, and remote voltage-sense at the terminals, the Skylla-TG delivers the accuracy your battery manufacturer expects.

Why boat owners choose Skylla-TG

• Serious output for large banks: 24 V models in 30 / 50 / 80 / 100 A; 48 V models in 25 / 50 A.

• House + starter coverage (24 V): Most 24 V models provide a full-rated house output plus a 4 A isolated auxiliary to maintain a start battery. (48 V models and the 24/100 3-phase are single-output.)

• Precision battery care: Fully adjustable absorption/float voltages, temperature compensation (sensor included), and remote voltage-sense for true at-battery regulation.

• Power-supply capable: Stabilized DC output lets the Skylla-TG work as a bench or ship's supply when the battery is offline.

• Flexible input options: Choose single-phase 120/230 VAC or 230 VAC, or 3×400 VAC models; every single-phase variant also accepts high-voltage DC input (~120–400 VDC) for AC-DC or DC-DC operation.

• Marine-ready build: IP21 aluminium enclosure, forced cooling, and a wide operating range (−40 to 122 °F) keep you online in harsh conditions.

• Alarm & control: Potential-free alarm contacts and remote on/off via an optional Skylla Control panel or switch.

Skylla-TG GMDSS (24 V) — purpose-built for distress & safety systems

Designed to simplify compliance, the GMDSS versions provide all required monitoring and alarms without extra boxes. Both the battery and the DC load connect directly to the charger; status and alarms show on a digital GMDSS panel (ordered separately) over a simple UTP cable. A built-in controller even estimates “time-to-go” during a mains outage — exactly what a watch-stander needs.

Available models

Skylla-TG (standard)

• 24/30 TG — 30 A: 120/230 VAC (95–264 VAC); also accepts 120–400 VDC input; includes 4 A starter-battery auxiliary.

• 24/50 TG — 50 A: 230 VAC (185–264 VAC); 180–400 VDC input; includes 4 A starter auxiliary.

• 24/50 TG 3-phase — 50 A: 3×400 VAC (320–450 VAC); includes 4 A starter auxiliary.

• 24/80 TG — 80 A: 230 VAC (185–264 VAC); 180–400 VDC input; includes 4 A starter auxiliary.

• 24/100 TG — 100 A: 230 VAC (185–264 VAC); 180–400 VDC input; includes 4 A starter auxiliary.

• 24/100 TG 3-phase — 100 A: 3×400 VAC (320–450 VAC); single-output (no 4 A auxiliary).

• 48/25 TG — 25 A: 230 VAC (185–264 VAC); 180–400 VDC input; single-output.

• 48/50 TG — 50 A: 230 VAC (185–264 VAC); 180–400 VDC input; single-output.

Skylla-TG GMDSS (24 V)

• 24/30 GMDSS — 30 A: 120/230 VAC (90–265 VAC). (Output limited to 22 A at 110 VAC.)

• 24/50 GMDSS — 50 A: 120/230 VAC (90–265 VAC).

Technical snapshot

• Charge algorithm: IUoUo 3-stage with fully adjustable set-points (absorption 28.5 V / float 26.5 V on 24 V models; 57 V / 53 V on 48 V); also works as a stabilized DC power supply.

• Outputs: most 24 V models = full-rated house output + 4 A isolated starter maintainer; 48 V and 24/100 3-phase = single-output.

• Input: single-phase 120/230 VAC or 230 VAC, or 3×400 VAC depending on model; single-phase units also accept ~120–400 VDC. 45–65 Hz, power factor 1.

• Operating temp: −40 to 122 °F; IP21 aluminium enclosure (blue RAL 5012); forced-air cooling.

• Connections: M8 battery studs; potential-free alarm contacts (60 V / 1 A, 1× NO + 1× NC); remote on/off.

• GMDSS versions: built-in monitoring/alarms with a “time-to-go” readout via the dedicated remote panel (sold separately).

Weight by model

• 24/30 and 48/25: ≈ 5.5 kg (12 lb)

• 24/50 3-phase, 24/80, and 48/50: ≈ 10 kg (22 lb)

• 24/50: ≈ 13 kg (28 lb)

• 24/100 and 24/100 3-phase: ≈ 23 kg (48 lb)

Three chassis sizes are used depending on output; refer to the model datasheet for exact mechanical dimensions.

Installation notes

Mount vertically in a ventilated space to support forced-air cooling. Use appropriately sized cabling and fusing; land the voltage-sense leads directly at the battery terminals and install the included temperature sensor on a representative battery. Because absorption and float voltages are fully adjustable, the Skylla-TG can be dialed in for flooded, AGM, or gel banks — and for lithium, set the voltages to your battery maker's spec and route BMS control through the remote on/off dry-contact.

Blue Marine tip: add a Victron BMV or SmartShunt battery monitor for accurate state-of-charge, and a Skylla Control panel if you want to limit input current on a small shore-power fuse or genset.