SKU: 64915351436

In Stock! Maytech 300A OPTO ESC with Water-cooling Splash Waterproof Aluminum Case Controller for Esurf Efoil

Sale price$173.66 Regular price$192.95
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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31

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Description

In Stock! Maytech 300A OPTO ESC with Water-cooling Splash Waterproof Aluminum Case Controller for Esurf EfoilMaytech 300A OPTO ESC with Water cooling Splash Waterproof Aluminum Case Controller for Esurf Efoil Hydrofoil Frequently Asked Question: 1. Do I have to use a water pump if the ESC is air cooled? This ESC is splash waterproof. It need water pump for cooling. Here is waterpump link: 12V 30W water pump and DC DC module for electric surfboard efoil electric boat ESCs Motors (when use water pump, please make sure test water tubes and no leaking before

Maytech 300A OPTO ESC with Water-cooling Splash Waterproof Aluminum Case Controller for Esurf/Efoil/Hydrofoil

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Frequently Asked Question: 

1. Do I have to use a water pump if the ESC is air-cooled?

This ESC is splash waterproof. It need water pump for cooling. Here is waterpump link: 12V 30W water pump and DC-DC module for electric surfboard efoil electric boat ESCs/Motors  (when use water pump, please make sure test water tubes and no leaking before mount it into your board.)

2. How to use Progcard? 

Please check instruction: 

https://michobby.com/blogs/news/300a-efoil-electric-surfboard-esc-progcard-instructions

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Default firmware is without throttle calibraiton, which is compatible with Maytech remote (1-2ms throttle signal range)

If you need to use the ESC with other remote or foward&reverse direction, please contact us for firmware reflesh details.

Model No.: MTSF300A-OPTO
With Water-cooling aluminum case
Splash waterproof
Cont. Current: 300A
Burst Current: 350A
BEC: NONE
Lipo: 6‐14S
Weight: 680g
Size: 146*84*30mm
Power cable: 8AWG black and red color
Great start‐up torque with sensorless motors

Please download manual here.

MTUBEC75VT5V:
Input: 18-75V DC
Output: 5V/1200mA
Funtion to supply 5V power to remote receiver.

Progcard-HA:
For adjusting parameters or refleshing different firmware.

For new users, recommend following 2 Options:

1. MT300A-OPTO-SF + UBEC-75V + Progcard: If you use the controller with motor that is not from Maytech, please choose this option, the motor can be programmable; Or if you use the ESC with maytech motor and you want to adjust parameters, you can choose this option. 

2. MT300A-OPTO-SF + Progcard: If you don't need the UBEC, you can choose this option. 

Application: Electric surfboard/efoil/foilboard/rc boat/jetski/jetfoil/flyboard/eelctric foil/waterboard/water jet/water jet propulsion/motorized surfboard/esurf/hydrofoil/surf foil/foil surf, etc.,

 

Related Products:

MTI65162 Fully Waterproof Motor 9KW:

MTI85165 Water-cooling Motor 10.5KW:
MTI120116 18.8KW Powerful Brushless Inrunner Motor with Water-cooling:
MT300A-OPTO-SF Non-waterproof 300A ESC with water-cooling:
MTSKR1805WF Waterproof Remote Controller:
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 64915351436

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Verified Purchase
JJ Fording
Battle Creek, US
★★★★★ 5
Balls
Size: Medium
My dog loves chasing these balls. He seems to love the squeak! They fit the chuck it stick perfectly, and are great replacements for the originals that came with the stick.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026
S
Verified Purchase
Steve just Steve
Grantham, US
★★★★★ 5
Nice set of balls
Size: Medium
The squeaker quickly became my dog’s favorite ball and has replaced the fuzzy tennis balls. My dog is a nonstop fetcher and these chuck it balls are durable and fun.
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Reviewed in the United States on January 9, 2026
C
Verified Purchase
Claudia Garfield
Chelsea, US
★★★★★ 5
Perfect ball
Size: Medium
Our dog loves these!
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Reviewed in the United States on May 26, 2026
T
Verified Purchase
Timothy john starkweather
San Leandro, US
★★★★★ 4
Soild
Size: Medium
The orange and blue ball is perfect. Once start taken because the because the blue noisy one was a little to easy for my dog to start ripping pieces off. Will say most toys do not survive his chewing.
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Reviewed in the United States on January 24, 2026
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Verified Purchase
Christy D.
Lowell, US
★★★★★ 5
Aggressive chewer who loves fetch approved!!
Size: Medium, Size: Medium
I highly recommend the Chuck-It brand in general, especially for dogs with an aggressive bite. These balls are awesome and are the most durable balls I’ve bought for my 50 lbs lab mix. He has not been able to break one of them yet and we’ve had a few of the squeaky balls for months. They are a bit pricey but worth it. The one in the pic has been used for months, lives outside and you can see it’s still in great shape.
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Reviewed in the United States on June 22, 2025

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