SKU: 30273584989

Simarine 300A Shunt

Sale price$162.00 Regular price$180.00
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

Simarine 300A ShuntEnhance your power system with the SC303 a compact, all in one battery monitor designed for accurate, real time insight into your energy setup. With a built in 300A shunt and support for multiple sensor types, the SC303 is ideal for marine, RV, and off grid installations where precision and reliability matter most. 300A High Precision ShuntProvides complete battery monitoring, including real time current flow, voltage, and state of charge essential

Enhance your power system with the SC303 – a compact, all-in-one battery monitor designed for accurate, real-time insight into your energy setup. With a built-in 300A shunt and support for multiple sensor types, the SC303 is ideal for marine, RV, and off-grid installations where precision and reliability matter most.

300A High-Precision Shunt
Provides complete battery monitoring, including real-time current flow, voltage, and state of charge – essential for managing inverters, winches, thrusters, and other heavy consumers.

Dual Voltage Inputs
Monitor up to two independent voltage sources, supporting up to 75.0 V each – perfect for tracking battery banks or auxiliary systems.

Tank Level & Temperature Monitoring
Includes two resistance inputs that can be used for either tank level sensors or temperature sensors, offering additional system oversight.

JST Temperature Sensor Socket
A dedicated JST connector allows for quick connection of an external temperature sensor, enabling thermal monitoring of the battery compartment.

Versatile System Integration
Use the SC303 to monitor both load and charge sources such as shore power chargers, solar panels, or generators—while also keeping tabs on tank levels or compartment temperature.

Applications:

  • Inverters

  • Thrusters & winches

  • Solar & shore power charging

  • Generator monitoring

  • Freshwater/greywater tank level sensing

  • Battery compartment temperature tracking

Additional Information:

  • Shunt Capacity: 300A continuous

  • Voltage Inputs: 2 (up to 75.0 V each)

  • Resistance Inputs: 2 (tank level or temperature)

  • Temperature Socket: 1 (JST connector)

  • Height: 8 cm

  • Length: 3 cm

  • Width: 11 cm

Upgrade your battery monitoring experience with the SC303 – delivering reliable, detailed data from a single, space-saving module built for demanding power systems.

WHAT'S IN THE BOX?
Shunt SC303 
5 m data cable
1 m temperature sensor
3 m fuse protected voltmeter cable
Shunt Cover

Click Here To Download Manual
Click Here To Download SC303 Wiring Diagram

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • 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: 30273584989

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Robert
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★★★★★ 5
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Size: XX-Large, Color: White
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Reviewed in the United States on September 15, 2025
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★★★★★ 5
Feels good on a cool day.
Size: Large, Color: Navy Blue
Why did you pick this product vs others?: I was looking for a mock turtle neck T-shirt so I was a bit surprised they were almost like a very light undershirt or sweater., or heavy tee.  I like to wear them when it's cool or under a shirt or sweater. Washability: Machine wash, dry on warm as it's got spandex in it.  Has held up to machine washing without loosing elasticity. Quality: Not a highly refined shirt.  Quality is ok but could be better. Weight: About like a heavy tee shirt or very light undershirt. Fit: About like a tee shirt.  Loose fit.
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Reviewed in the United States on June 29, 2025
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Sky Soldier
Lexington, US
★★★★★ 5
The material and tight fitting helps keep you warm…
Size: Large, Color: Green
I am 5’8” tall and weigh in at 172 lbs dressed. These are the most comfortable cold weather shirts I have ever worn. In my humble opinion, what makes these shirts so comfortable and warm is the tight fitting and the soft, fleece like feeling on my skin. I wear and ordered the large size. The shirt is cut so they fit close to one’s body and look great compared to other brands of shirts that end up looking like one is wearing a potato bag. The tight fitting helps keep me feeling warm. No cold air pockets.
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Reviewed in the United States on January 27, 2026
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amessb
Louisville, US
★★★★★ 4
Nice, very soft fabric
Size: XX-Large, Color: Green
Very nice fabric, sizing is goood and only shrinks slightly after washing/drying. Good color selection
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Reviewed in the United States on February 24, 2026
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Wisconsin Golfer
Waukegan, US
★★★★★ 5
Better than expected
Size: X-Large, Color: Light Red
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