IN-ST550

ST Series

Design & Exterior Identity

The ST550 introduces a new interpretation of the Invictus design language.

Key Design Features
Elegant semi-reverse bow
Classic-inspired motor yacht silhouette
Clean, flowing hull lines
High protective bulwarks
Large glass surfaces for panoramic views
Refined stainless-steel details
Premium teak and optional luxury finishes

The design combines timeless elegance with modern functionality, creating a yacht that appears both powerful and graceful on the water.

Performance & Navigation

The Invictus ST550 offers a balance between performance, efficiency, and comfort.

Propulsion Advantages
Twin Volvo Penta IPS systems
Excellent maneuverability
Joystick docking assistance
Reduced vibration and noise
Efficient cruising performance
Performance Characteristics
Comfortable cruising capability
Maximum speed approximately 35 knots depending on configuration
Designed for both coastal passages and longer journeys

Revolutionary Exterior Layout
The ST550 redefines outdoor living on a 17-meter yacht.

Forward Living Area

A major innovation of the ST550 is the expansive bow lounge:

Large U-shaped sofa
Sunbathing area
Open-air relaxation space
Protected and comfortable environment

This creates a private “sea terrace” at the front of the yacht.

Main Deck & Cockpit

The main deck is designed as a luxury social area:

Spacious lounge configuration
Convertible dining area
Panoramic views through large glass surfaces
Optional kitchen arrangements
Direct connection between indoor and outdoor spaces

The layout allows owners to adapt the yacht according to their lifestyle, whether for entertaining or relaxed cruising.

Interior Comfort & Accommodation
The ST550 offers the atmosphere of a true luxury yacht.

Main Deck
Elegant salon
Helm station with panoramic visibility
Customizable kitchen solutions
Premium materials and finishes
Lower Deck

Possible layouts include:

Master cabin with private bathroom
VIP cabin with private bathroom
Convertible central area
Optional third cabin
Optional crew cabin

The interior philosophy combines luxury, practicality, and personalization.

Technology & Customization
The ST550 benefits from Invictus’ high level of personalization.

Customization options include:

Exclusive hull colors
Bespoke upholstery
Luxury wood finishes
Premium fabrics and leather
Different interior layouts
Advanced navigation systems

Each ST550 can become a unique expression of the owner’s personality and cruising style.

Main Strengths of the ST550

Space

✓ Exceptional volume for a 16.87 m yacht
✓ Large outdoor living areas
✓ Flexible interior configurations

Luxury

✓ Italian craftsmanship
✓ Premium materials
✓ Sophisticated atmosphere

Innovation

✓ New space-oriented design philosophy
✓ Panoramic living concept
✓ Advanced propulsion technology

Comfort

✓ Designed for extended cruising
✓ Quiet and stable navigation
✓ Direct connection with the sea

Ideal Owner Profile
The Invictus ST550 is designed for owners who appreciate:

Contemporary Italian yacht design
Spacious and elegant living areas
High levels of customization
Comfortable Mediterranean cruising
A yacht combining tradition and innovation

Conclusion
The Invictus ST550 represents a new era for Invictus Yacht.

With its innovative use of space, elegant design, advanced technology, and luxurious interiors, it delivers a unique experience between a sophisticated cruiser and a modern yacht.

Invictus ST550 — Space redefined, Italian elegance perfected.

Specifications

Specification ST550
Length overall (LOA) 16.87 m / 55'4"
Maximum beam 5.04 m / 16'6"
Full-load displacement 25 tonnes
Maximum draft Approx. 1.20 m / 3'11"
Fuel capacity Approx. 2,200 L / 581 US gal
Fresh-water capacity Approx. 500 L / 132 US gal
Black-water capacity Approx. 330 L / 87 US gal
Maximum persons 14
Hull Fiberglass/GRP, planing
Builder Cantieri Aschenez
Designer Christian Grande

Propulsion Volvo Penta IPS
Engine choices 2 × IPS 800 or 2 × IPS 950
IPS 800 power 600 hp each
IPS 950 power 725 hp each
Total power 1,200 hp or 1,450 hp

Standard Equipment

Invictus ST550 — Standard Equipment
1. Propulsion

The ST550 is designed around Volvo Penta IPS propulsion:

Standard/permitted engine: 2 × Volvo Penta IPS 800
Optional: 2 × Volvo Penta IPS 950
IPS pod propulsion with joystick control
Diesel engines
Integrated steering and propulsion system

The official Invictus specification gives the permitted power as 2 × Volvo Penta IPS 800 / 2 × Volvo Penta IPS 950.

2. Main-deck arrangement

The enclosed main deck is a major part of the ST550 concept and includes:

Large panoramic salon
Helm station
Galley/kitchen arrangement
Large glazed surfaces
Interior dining/lounge area
Direct relationship between the interior and exterior entertaining areas

The V1 Kitchen Version is one of the principal layouts, while Invictus also offers a V2 Living Version.

3. Lower deck — standard

The official ST550 configuration identifies V1 Living Version as the standard lower-deck arrangement.

The standard accommodation includes:

Master cabin
VIP cabin
Private bathroom facilities
Convertible midship living area
Storage
Interior living space

The midship area can subsequently be configured differently depending on the owner's requirements.

4. Exterior

The ST550 is designed around substantial outdoor living space, including:

Large cockpit
Forward exterior lounge/sun area
Swimming platform
Tender garage
Swimming ladder
Exterior seating and tables
Cockpit access to the bathing platform

The yacht measures 16.87 m overall, with a 5.04 m beam, a full-load displacement of approximately 25 tonnes, and capacity for up to 14 people.

5. Helm & navigation

The ST550 is designed with a modern integrated helm. Depending on the specification, equipment can include:

GPS/chartplotter
Autopilot
Radar
VHF
AIS
Compass
Depth sounder
Navigation center
Touchscreen displays
Engine/IPS controls
Joystick maneuvering

However, I would not assume all of the above are standard on every ST550. Current boats for sale show different electronics packages, which illustrates how much the equipment can vary from one build to another.

Options & Part Number

Major ST550 Options

1. Volvo Penta IPS 950

This is one of the most significant performance options.

Standard:
2 × Volvo Penta IPS 800

Option:
2 × Volvo Penta IPS 950 — 725 hp each.

A current 2026 ST550 equipped with the IPS 950 is listed with 2 × D11-IPS 950, 725 hp, and joystick control.

If performance is important, this would be one of the first options I would consider.

2. Alternative interior layouts

This is where the ST550 becomes particularly interesting.

Standard lower deck — V1 Living

The standard arrangement has a flexible living area.

Optional V2 — Cabin Version

The midship area is converted to provide an additional cabin arrangement.

Optional V3 — Kitchen Version

The lower deck can instead incorporate a kitchen arrangement.

Optional crew cabin

A crew cabin can also be added to the lower deck.

Invictus' official catalogue specifically identifies:

AreaConfigurationLower deck V1Living — StandardLower deck V2Cabin — OptionalLower deck V3Kitchen — OptionalCrew cabinOptional

3. Galley configuration

The main deck itself can be configured around different uses.

Invictus shows:

Kitchen Version
Living Version
Convertible kitchen/living/cabin arrangements

The kitchen can include equipment such as:

Refrigerator
Freezer
Oven
Dishwasher
Grill
Ice maker
Storage
Bar/refrigeration arrangements

The exact appliance package depends on the selected configuration.

4. Stabilization

A very important option for a yacht of this size is gyroscopic stabilization / Seakeeper.

Available equipment on current ST550 specifications includes:

Seakeeper/gyroscopic stabilizer
Bow thruster
Stern thruster

These are particularly worthwhile if the yacht will spend significant time at anchor or cruising in open water. A current ST550 listing specifically identifies Seakeeper, bow thruster and stern thruster equipment.