ZTW Dolphin 300A HV 10-20S Waterproof Marine ESC for eFoil & Electric Surfboard
ZTW Dolphin 300A HV Waterproof Marine ESC
The ZTW Dolphin 300A HV is a high-current waterproof marine ESC designed for electric surfboards, eFoils, electric hydrofoil boards, small boats, and high-performance marine propulsion systems. It is built for builders and manufacturers who need stable, powerful, and responsive brushless motor control in demanding water environments.
Supporting 10-20S LiPo input (42-84V), 300A continuous current, and up to 1200A burst current, this Dolphin ESC delivers strong acceleration and sustained power for heavy-load marine applications. Its IP67 waterproof metal enclosure, dual heat-dissipation design, and water-cooling tube help maintain reliable performance during long runs and high-current operation.
Key Features
- 300A high-current waterproof marine ESC for electric surfboards, eFoils, and boat propulsion systems.
- High-voltage 10-20S LiPo support, suitable for 42-84V marine power systems.
- 300A continuous current and 1200A burst current for demanding acceleration and heavy-load applications.
- High-performance MCU enables instant start, fast throttle response, high efficiency, and low noise.
- Adaptive throttle response supports nimble control for small boats and stable output for larger watercraft.
- IP67 fully waterproof design with a metal enclosure for harsh marine environments.
- Dual cooling system combines an aluminum casing and water-cooling tube for efficient heat dissipation.
- 5V/1A BEC output provides stable power for the control system.
- Comprehensive intelligent protection includes over-voltage, low-voltage, over-current, overheat, communication fault, motor fault, and throttle signal loss protection.
Typical Applications
- Electric surfboards
- eFoil and electric hydrofoil boards
- High-performance marine propulsion systems
- Small boats and electric watercraft
- Waterproof brushless motor control projects
- OEM water sports equipment and marine drive systems
Click here to download the ZTW Dolphin 300A quick guide
Specifications
| Model | Dolphin 300A HV 10-20S |
| Continuous Current | 300A |
| Burst Current | 1200A |
| Voltage | 10-20S LiPo (42-84V) |
| Power Wire | 6 Gauge 275mm Red / 275mm Black |
| Motor Wire | 6 Gauge 275mm Black |
| BEC Output | 5V / 1A |
| Size (not including wires) | 160 x 110 x 39.5mm (L*W*H) |
| Weight | 1143g |
For bulk orders, OEM projects, or technical matching, contact ZTW with your battery voltage, motor power, propeller or jet drive setup, cooling method, target current, and electric surfboard or eFoil application details.
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Let customers speak for us
powerful motor combo , motor not too hot , like it!
motor and esc work great , fast shipping
Love you guys products good job
This past weekend i entered the 5th sunday series with my new ztw 260a G2 pro ESC in A Truggy. This esc was programmed using Elliot Boots setup for power and driveability. All i can say is "WOW" its very powerful and for the first 3 heats i was running third. Amains came i finished up 4th overall due to tyre choice and an old sensor lead. Overall I am very impressed by the tunability and the enormous power this esc has. Great job ZTW this ESC truly is a Beast
Very fast delivery I can't test yet because still waiting for engine but quality is premium
Hands down my favorite company, they are a OEM manufacturer for many companies. Everything works as stated, they even give better performance on their "ZTW" models then the ones they provide other companies. The Bluetooth is on point and easy to use, no more program cards! Cheers enjoy your racing and bashing.
Works as advertised.
at the moment my best esc. programming via app and blutooh unit comfortble and easy.
is of course not my last ztw
While companies that use ZTW esc with "their" brand on it give less for more. ZTW direct is best. Integrated BT, 32 bit, functions galore! Fast shipping. The only ESC i need.
A large and quality ESC that is necessary for my fe RBC hydroplane. Another brand was fried but this 200 A served me well. Nothing but praise.
We have used both the beast 220a and now this 60a esc you can find out more on our experience on youtube @reitplace4765 for run and install videos..
Great build quality.
