E350HDB eVision tunnel thruster 48V

E350HDB eVision tunnel thruster 48V

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The E350HDB is a high-performance 48V tunnel thruster for boats between 72 and 100 feet, developed as an integrated part of Sleipner’s Hybrid Power Center (HPC) system.

Designed for larger vessels and demanding operating conditions, it delivers powerful, responsive thrust, optimized efficiency and seamless system integration. The E350HDB features a DNV-certified gearleg and counter-rotating brass propellers that provide exceptional durability, strength and long-term reliability.

Featuring a new 6-phase PMSM synchronous motor developed specifically for marine thruster use, the E350HDB delivers performance and runtime never before seen in a DC thruster while optimizing overall system efficiency and onboard power management.

  • Up to 50% lighter
  • Compact design
  • Industry-leading runtime
  • Active air cooling

Important:
This thruster is exclusively available as part of a complete Sleipner Hybrid Power Center (HPC) system and is not sold as a standalone product.

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Product Description

Properties

S-LINK™

S-Link™ is a CAN-based control system used for communication between Sleipner products installed on a vessel.

  • Compact and waterproof plugs
  • Keyed and color-coded connectors to ensure correct and easy installation
  • Different cable lengths, extenders and T-connectors makes the system scalable and flexible to install

Q-PROP™

The Q-PROP™ has measured noise reductions of up to 75% in controlled environments. The five-bladed skew propeller reduces noise levels while maintaining exceptional efficiency. Some thruster models even see an increase in thrust power.

  • The expected noise reduction in average installations: 20-40%
  • Upgrade kits are available for most Sleipner thruster models with special adaptors

PRO™

A PRO™ thruster system enables you to apply only the necessary power to complete your maneuver. The variable speed control eliminates the noise associated with standard on/off thrusters.

The system also includes a practical hold-function. In a dual system (bow and stern) a single press of a button will keep you alongside the docks – making docking truly a one-person job.

Speed controlled thrusters are the best choice for joystick interaction.​

HOLD-FUNCTION

Docking your vessel has never been easier. With a single press of a button, you can rely on your thrusters to maintain the boat controlled against the dock while stepping off to secure the lines — making docking truly a one-person job.

IGNITION PROTECTION

Ignition-protected products are compliant with ISO 8846 to operate safely in hazardous environments where gasoline vapors or other flammable gases might be present.

OVERHEAT PROTECTION

When high temperatures are detected, On/off thrusters are automatically shut off to prevent overheating. PRO™ thrusters with speed control provide extended run-time by derating power to maintain temperature within safe levels.

SAFE START-UP

This control panel use dual ‘on’ buttons to prevent accidental activation for a child-safe environment.

FLEXIBLE INSTALLATION

Sleipner offers installation flexibility to work with the space you have. Our thruster models allow installation at any angle on the tunnel, tailored to fit any space available in your vessel.

SPLASH-PROOF

This product is manufactured for installations in environments that may experience moist or occasional splashes.

GALVANIC SEPARATION

Immersed parts exposed to seawater are galvanic isolated from the onboard electrical system, eliminating stray currents.

SEALED DRIVE LUBRICATION

The thruster gearleg is pre-filled for lifetime lubrication and sealed using a long-time mechanical seal with ceramic and carbon surfaces for ultimate security against water intrusion.

FLEXIBLE COUPLING

Flexible coupling protects the product’s driveline by compensating for minor misalignments between the shafts of the thruster motor and gearleg.

TWIN COUNTER-ROTATING PROPELLERS

Two counter-rotating propellers offer the most thrust at a good performance ratio in a minimal tunnel diameter. This system is used in our larger thrusters for maximum power. Our twin-counter thruster range is the favorite among leading boatbuilders in high-end yachts.

Category Specification Value
Power Power supply 48V DC
Nominal voltage 42V DC
Current consumption 545 A
Power output (nominal voltage) 22.00 kW / 29 hp
Recommended fuse ANL 500
Minimum battery CCA (DIN/SAE/EN) 545 / 1035 / 927
Protection & Alarms Ignition protection rating ISO 8846
IP rating IPx7
Alarm notification Via control device
Performance & Features Motor cycle duty Continuous @ 22°C
Thrust at 48V/42V 350.00 kg / 771 lbs
Key Features Q-Propeller, Twin Counter Rotating, Sealed Lubrication, Galvanic Separation, Variable Speed, S-Link, Overheat Protection, Child Safety, Intelligent Power Control, etc.
Dimensions Height (H) 477 mm / 18 in
Length (L) 285 mm / 11 in
Width (W) 258 mm / 10 in
Internal Diameter (ID) 300 mm / 11 in
Min. Water Depth (WD) 300 mm / 11 in
Tunnel Length (Min/Rec) 280 mm / 340 mm
Tunnel Wall Thickness (Min/Max) 10 mm / 12 mm
Stern Thruster Height (H) 285 mm / 11 in
Internal Length (L) 427 mm / 16 in
Width (W) 458 mm / 18 in
Max Hull Thickness (HT) 50 mm / 1 in
General Compliance / Weight DNV Type Approved / 43 kg / 94 lbs

Are Lithium-ion (Li-ion), LiFePO4 or Lithium batteries a good solution for thruster battery banks?

Not necessarily. These systems typically come with a Battery Management System (BMS) that will disconnect the thruster in case of any issue with the battery (for instance, if the thruster draws more current than the BMS allows). Just imagine a sudden cut-out in the middle of a maneuver without any pre-warning.

At Sleipner, we recommend a solution with a simple, separate battery and without a disconnect BMS system (such as the lead acid bank frequently used for starting or similar). The helmsman will then be warned when the battery is getting low and feel that the thrusters are gradually losing power, which is significantly better than losing your thrusters without any pre-warning.

Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.

Can I use LiFePO4, Lithium or Lithium-ion batteries for my thrusters?

Yes, you can, but not without taking some precautions. Sleipner produces two product lines of thrusters that will work well with high-capacity batteries and one product line which should be used with caution in combination with LiFePO4, Lithium, Li-ion, or similar batteries, which may be capable of delivering higher voltage under load than traditional batteries (such as lead-acid, AGM, gel or similar).

All Sleipner proportional thrusters will work well with Li-ion or LiFePO4 batteries, as the included PPC unit will control the output voltage to a safe level for the thruster. Make sure, though, that you actually get a good battery intended for maritime use. NB – make sure you have the latest embedded software installed.

All Sleipner eVision thrusters have built-in functionality to limit the maximum voltage delivered to the thruster. Again, make sure your battery is intended for maritime use.

Traditional DC on/off thrusters may be damaged or have a reduced life expectancy if operated at voltage levels outside their specifications.
Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.

Can the thruster cause the BMS (Battery Management System) to disconnect the batteries?

Yes. Most engineers would tell you that it is not ideal for connecting the bow thrusters to a service bank protected by a Battery Management System. Thrusters are heavy consumers, and they may create sudden peaks in current draw, which again may cause the BMS to disconnect the batteries if the thruster draws more current than allowed. If this happens in the middle of a maneuver, you would be left without thrusters and may lose control of the boat.

Hence, Sleipner recommends that the thrusters be connected to a separate battery bank (that is not lithium) without a Battery Management System that can disconnect the batteries (and consequently the thrusters).

Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.

What is the S-link control system?
S-link is a Sleipner CAN BUS based control system with full intelligent communication between all devices within the system, much like a computer network. It is used for all retract thrusters and Pro thrusters with a DC control system.

Main advantages include:

• Round, compact and waterproof plugs with unique keying and color coding to avoid faulty hookups.

• An unlimited number of commands or information transfer on a single cable.

• It has user feedback to panel

• Intelligent troubleshooting

What type of batteries are recommended for thrusters?

Sleipner recommends that the thrusters are connected to a battery bank that is not protected by a Battery Management System (BMS). Typically this means lead-acid, AGM, gel, or similar kinds of batteries. This is important because thrusters draw a lot of currents quickly, and the high amp draw may lead the BMS system to think that there is an issue with the system and consequently disconnect the batteries from the circuit, in which case you would lose maneuverability.

If you have Lithium batteries powering your thrusters, the best advice we can give you is to check the actual voltage measured on the thrusters during operation. Sleipner thrusters are designed to operate within a specific voltage range, and as long as you are within these boundaries, it doesn’t matter for the thruster if the current is delivered by this or that battery pack.

It may also be a very good idea to check the actual current drawn from the battery during full power at the thruster to see that you are not at the limit for the BMS to avoid sudden loss of maneuverability if the BMS disconnects the battery.

With installations where the battery pack is far from the thruster, the higher voltage delivered by LiFePO4 or similar batteries might not be a problem as you will experience a voltage drop through the long cables.

Always make sure you measure your voltage on the thruster to avoid the risk of early thruster wear.

As battery tehcnology is changing rapidly, we always recommend consulting a professional battery supplier.

Disclaimer: Ensure battery/energy source is installed according to CE/ISO current rules and regulations and by licensed electricians.

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