NEW STREAM Electric Motor Technology

New Stream 25kW Stern Drive Electric Boat Motor

NS-STERN-25

New Stream’s flagship 25kW stern drive electric boat motor NS-STERN-25 delivers limitless power and performance even in the harshest marine conditions. Delivered with Nawis Marine quality, this stern-drive system combines silent operation and eco-friendly technology with immense torque.

25 kW
Power
180‑230 HP
Equivalent Power
331 Nm
Max Torque
6-24 m
Boat Length
Other Models
NS-STERN-08 8 kW NS-STERN-12 12 kW NS-STERN-16 16 kW NS-STERN-20 20 kW
NS-STERN-25 25 kW
Silent Operation
Zero Emission
NS-STERN-25 25kW stern drive electric boat motor - Flagship High-Performance Propulsion

25kW Stern Drive Electric Boat Motor Features

The flagship advantages of the New Stream NS-STERN-25 25kW stern drive electric boat motor

⚡

High-Performance Power

25kW Stern Drive electric boat motor
Bring top-tier thrust and judder-free cruising comfort to your boat with the 25kW Stern Drive electric boat motor.
🌱

Zero Emission

Eco-friendly technology
Thanks to eco-friendly motor technology, cruise while protecting nature and zero out your carbon footprint.
🔇

Silent Operation

Ultra-silent motor technology
The design of the fully electric motor keeps noise to a minimum, letting you rediscover peace on the water.
🔧

Low Maintenance

99% lower maintenance cost
With the total quality built on our “Zero Maintenance – Zero Cost” promise, our New Stream electric propulsion motors cut your maintenance costs by 99% or more.
🔗

Easy Integration

Universal mounting adaptors
It enables fast, easy installation on boats — it makes no difference what type of boat you have, which drive-mounting type your motor uses, or which transmission type you run.
🔋

Linear Battery Consumption

SMCS algorithm technology
The Smart Magnetic Commanding Systems (SMCS) algorithm matches active, dynamic torque demand and supports energy needs with AI-assisted systems tuned to the difficulty levels it encounters.
🔌

Advanced Energy Control

Advanced BMS technology
Thanks to the advanced Battery Management System boards and software (BMS) built by Nawis Marine engineers, energy values are monitored in real time with a high degree of safety and priority.
🤖

Smart Boat Automation

IoT 4.0 technology
All switching systems tied to a boat’s fuses, and all controls, are configured from touchscreens via the NAWIS MARINE IoT 4.0 smart management system.
🧭

Smart Cruise Automation

NMACS control system
Management via a comprehensive Nawis Marine Analytic Control Systems (NMACS) that performs detailed real-time analysis of cruising data and handles controlled alerts and cruising-discipline anomalies.
🌊

Long-Range Capability

Energy-flow stability
Thanks to the energy-flow stability that comes from the battery’s capacity control and freedom from amperage spikes — enabled by our motor technology — long ranges are now effortless.
📡

Remote Monitoring

NRDSS telemetric system
Telemetric data access through the advanced Nawis Remote Data Stream Systems (NRDSS) we developed in the light of technological innovation.
📊

Project-Specific Efficiency Checks

AI-assisted analytics
AI-assisted analytical engineering services for motor-to-boat matching.
🚀

Project-Specific Propeller Design

Optimised propeller algorithm
AI-assisted analytical engineering services running kW–A–rpm–torque–speed algorithms for motor-to-propeller matching.

25kW Stern Drive Electric Boat Motor Technical Specifications

NS-STERN-25 flagship 25kW stern drive electric boat motor teknik verileri

Tap the tabs to view the sections
Model NEW STREAM 25 kW
Mounting Method STERN
Operating Voltage (V) 87,6 V – 102,2 V
Current Values (A) 0-285 A – 0-244 A
Maximum Torque (Nm) 331 Nm
Motor Power (W) 25.000 W
Motor Peak Power (W) 27.500 W
Revolutions per Minute (RPM) 720 – 1400 – 2300 rpm
Equivalent Power (HP)* 180-230 HP
Weight (kg) (New Product 2025)
* Different results were obtained on displacement, semi-displacement, planing and catamaran hulls with varying LOA, LWL, LBP, B and D values.
** Tested in the 2–6 kW range for boats of different attributes and weights.
*** For twin-motor application techniques across all our motor options — based on different boat attributes and weight data — consult the New Stream technical team.
**** The front mounting bracket can be used in both directions.

25kW Stern Drive Electric Boat Motor Calculator

Battery and cruising-time analysis for the NS-STERN-25 25kW stern drive electric boat motor.

💡

How to Use

  • the electronic throttle by dragging or with the arrow keys to set the throttle level
  • Single or twin motor setup (in twin mode each motor has its own throttle)
  • your battery pack select (8–64 kWh)
  • Your estimated time is calculated instantly
📊

Power-Level Recommendations

🍃 Economy: 25–49% (Long Range)
⚡ Normal: 50–74% (Balanced)
🚀 Performance: 75–100% (Speed)
⚡
Motor Power 25 kW
Number of motors
Total power: 12.5 kW
Avg throttle: %50

Drag the lever, or select it and adjust with the arrow keys.

🍃 Economy (25–49%)
⚡ Normal (50–74%)
🚀 Performance (75–100%)

Choose Your Battery Pack

⏱️ Estimated Cruising Time
2.0 Saat
25 kWh battery at 12.5 kW power
⛽

Fossil-Fuel Engine Comparison

On fossil-fuel powered boats, running in the 65–80% power range is usually recommended to optimise fuel efficiency and engine life. This economical cruising speed strikes an ideal balance between fuel consumption and speed.

🔋

The New Stream Advantage

Thanks to the high thrust they deliver at low kW levels, New Stream electric propulsion systems reduce the throttle that fossil-fuel engines use in their 65–80% economical cruising range down to just 40–65%. This both saves energy and yields a more efficient cruise. As a result, longer voyages are possible without needing large-volume (high-kWh) battery packs.

Accessories

All the accessories you need for your electric boat systems

→ Swipe to explore

25kW Stern Drive Electric Boat Motor Comparison

See the power differences between the New Stream 25kW stern drive electric boat motor and our other models

Swipe for more models →
Features NS-STERN-08 NS-STERN-12 NS-STERN-16 NS-STERN-20 NS-STERN-25
Current Model
Motor Power 8 kW 12 kW 16 kW 20 kW 25 kW
Equivalent Power 50-70 HP 75-100 HP 95-120 HP 130-170 HP 180-230 HP
Maximum Torque 104 Nm 126 Nm 158 Nm 243 Nm 331 Nm
Operating Voltage 87,6 V 87,6 V 87,6 V – 102,2 V 87,6 V – 102,2 V 87.6 V – 102,2 V
Current Values 0-90 A 0-137 A 0-182 A / 0-156 A 0-228 A / 0-195 A 0-285 A – 0-244 A
Suitable Boat Length 6-12 m 6-17 m 6-17 m 6-24 m 6-24 m
Boat Weight 1.5-14 ton 1.5-30 ton 1.5-40 ton 1.5-80 ton 1.5-80 ton
Speed Range 7-10 kn 8-10 kn 8-10 kn 8-12 kn 8-12 kn
Motor Weight 48 kg 58 kg 70 kg (New Product 2025) (New Product 2025)

Electric Boat Motor Comparison Note: All New Stream units are equipped with the latest technology. The most effective 25kW Stern Drive electric boat motor for your boat is optimised to your hull form and usage goals. The Nawis Marine team guides you at every step.

Which Model Suits You?

Our technical team helps you determine the most suitable model for your boat

Get Technical Advice

25kW Stern Drive Electric Boat Motor Use Cases

Boat categories where the NS-STERN-25 25kW stern drive electric boat motor is most efficient.

Private Boats
Motor Yachts
Passenger Boats
Fishing Boats
Tourist Boats
Tenders
Catamaran
Sailing Boats
Water Taxis
Scuba Diving
House Boat
Sport-Fishing Boats

25kW Stern Drive Electric Boat Motor Documents

Download the brochure for the NS-STERN-25 25kW stern drive electric boat motor and get technical support from Nawis Marine experts.

📄 Turkish Brochure (NS-STERN-25) 📄 English Brochure (NS-STERN-25_EN) 💬 Request a Quote & Info
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