Side-Power SRP80/185T Retractable Thruster (24V, 185 mm, Proportional)

The SRP80/185T 24V is a retractable thruster designed for both sailboats and motorboats in the 35–48 ft range. In its deployed state, it functions like a tunnel stern thruster; when retracted, it disappears into the hull, eliminating drag and preserving hull lines. Because it’s powered by 24V, it integrates seamlessly with modern battery banks commonly found on cruising yachts.

This model provides the flexibility of a bow thruster for boats or stern thruster depending on installation, but in this version it is optimized for stern applications on sailboats.

Small Retractable Bow Thruster Concept

Although primarily installed at the stern, the SRP80/185T 24V shares the same concept as a small retractable bow thruster—compact, reliable, and efficient. It deploys only when needed, providing powerful thrust for docking, then retracts flush to preserve sailing performance.

Sailboat Stern Thruster — Optimized Design

As a sailboat stern thruster, the SRP80/185T 24V offers:

• Thrust power (80–96 kg) tailored for mid-size yachts.
• Retractable design that eliminates drag under sail.
• Compatibility with 24V electrical systems for efficient energy use.
• Quiet operation, perfect for marinas and premium sailboats.

Technical Specifications

Performance varies depending on installation depth, tunnel length, and voltage stability.

Performance & Runtime

The 24V system offers a stable supply of power, reducing current draw and heat compared to 12V equivalents. This results in:

• Longer runtime before thermal limits are reached.
• More consistent thrust in demanding docking maneuvers.
• Better efficiency for modern sailboat power systems.

Noise & Vibration Reduction

Because the SRP80 retracts into the hull when not in use, it produces no drag noise while sailing. When deployed, the sealed gearleg and optimized propeller design minimize vibration and provide smooth, quiet operation, enhancing comfort on board.

Maintenance & Durability

• Sealed gearleg prevents water ingress and minimizes upkeep.
• Pre-filled lubrication ensures long-term operation without maintenance.
• Zinc anodes provide corrosion protection in saltwater environments.
• Designed with marine-grade materials to withstand continuous use.

Comparison with Other Thruster Types

The retractable stern thruster is the preferred choice for performance-oriented sailboats where efficiency, aesthetics, and maneuverability all matter.

Certifications & Compliance

• CE Certified
• UKCA Approved
• Built to ISO standards for safety and marine compliance.

Installation & Integration

• Requires a 185 mm tunnel installation.
• Retracts flush to the hull for zero-drag performance.
• Integrates with joystick control systems, enabling coordinated bow-stern maneuvering.
• Compatible with Side-Power’s S-Link™ network for plug-and-play installation.

Use Cases & Applications

• Sailboats requiring precise stern-side maneuvering in tight harbors.
• Yachts with dual-thruster setups for complete docking control.
• Refits replacing fixed tunnel thrusters with retractable systems.
• Owners who value sailing performance without sacrificing docking safety.

Why Choose the SRP80/185T 24V Retractable Thruster?

• Combines sailboat stern thruster efficiency with retractable stealth design.
• Matches 24V electrical systems commonly found in modern yachts.
• Provides both thrust power and minimal drag.
• Low-maintenance system engineered for reliability.