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Simarine Battery Shunt 300A 2x Voltage, 2x Resistance, 1x Temperature

Active 300A Combo Shunt with Tank, Temp & Dual Voltage Inputs


Regular price $199.00
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Simarine SC303 300A active digital battery shunt showing terminal bolts and sensor ports

Simarine Battery Shunt 300A 2x Voltage, 2x Resistance, 1x Temperature

DESCRIPTION

Simarine SC303 Active Combo Shunt: Comprehensive Battery and Tank Monitoring

The Simarine SC303 Active Combo Shunt represents a significant upgrade for marine, caravan, and off-grid power systems. Designed specifically for seamless integration with the PICO battery monitor, this advanced module combines precise high-current sensing with versatile tank level and temperature monitoring. By consolidating multiple sensor inputs into a single unit, the SC303 streamlines your wiring and provides a complete overview of your critical system data in one location.

High-Capacity Current Sensing for Heavy Loads

Engineered to handle substantial power demands, the SC303 provides continuous current monitoring up to 300A, making it highly effective for tracking heavy consumers like large inverters, bow and stern thrusters, and anchor winches. It is equally capable of monitoring high-output current generators such as shore power chargers, alternators, and solar panel arrays. With a peak current rating of 400A for under one minute and up to 700A for less than five minutes, this active shunt easily accommodates the starting surges of heavy-duty equipment without compromising accuracy.

Versatile Inputs for Complete System Visibility

Beyond standard battery tracking, the SC303 functions as a multi-purpose central monitoring hub. It features two dedicated voltage inputs compatible with systems up to 75V, making it highly adaptable for standard 12V, 24V, and 48V setups. Additionally, the unit incorporates two resistance inputs specifically designed for tracking fluid levels in fuel, fresh water, or grey water tanks. A dedicated socket for an NTC 10k temperature sensor allows you to keep a close eye on battery banks or ambient cabin temperatures, ensuring your critical equipment operates safely within acceptable thermal limits.

Robust Construction and Easy Integration

Built for the demanding conditions typically encountered in marine and mobile off-grid environments, the SC303 features heavy-duty M10 bolt terminals that ensure a secure, low-resistance connection for your main battery cables. Communication with your PICO display is handled effortlessly via dual SiCOM RJ9 data ports, allowing for simple data daisy-chaining with other Simarine expansion modules. A fully integrated 6-way screw terminal block further simplifies the connection of your secondary voltage and resistance sensors.

Key Features

  • Continuous 300A current monitoring with peak capacities up to 700A for heavy motor startups
  • Broad voltage compatibility up to 75V, perfectly suited for 12V, 24V, and 48V power applications
  • Two independent voltage inputs for monitoring secondary starting or auxiliary battery banks
  • Two resistance inputs for accurate, real-time fluid tank level tracking
  • Dedicated NTC 10k temperature sensor port for essential battery thermal monitoring
  • Heavy-duty M10 bolt terminals providing secure, high-current electrical connections
  • Dual SiCOM RJ9 ports for streamlined data communication and network expansion

Streamline Your Off-Grid Power Management

Whether you are upgrading an existing marine electrical system or outfitting a new off-grid caravan, precise system data is critical for reliable energy management. The SC303 eliminates the need for separate standalone tank monitors and voltage sensors, combining them into one highly accurate, easy-to-install package. Upgrade your power setup with the Simarine SC303 Active Combo Shunt today and gain total visibility over your battery capacity, power consumption, and essential fluid levels.

SPECIFICATIONS

Specifications

Voltage range6 - 35V
Temperature range-20°C - 70°C (-4°F - 158°F)
Power consumption at 12VOperating 1.2 mA
Current measuring range0.01 - 300A
Accuracy± 1%
Resolution0.01A
Sampling rate100ms
Continuous300A
Peak current (<5min)400A
Peak current (<1min)700A
Suitable for maximal power3600W at 12V or 7200W at 24V
Voltage drop at 300A37.5mV
Maximal voltage on terminals35V
Voltage inputs (U1, U2)2
Voltage input range0 - 75V
Voltage input accuracy± 0.3%
Voltage input resolution1mV
Voltage input sampling rate100ms
Resistance inputs (R1, R2, JST socket)3
Resistance input range0 Ohm-65 kOhm
Resistance input accuracy±3%
Temperature sensorNTC 10k
Temperature sensor rangeFrom -13°C to +80°C
Temperature sensor accuracy (from -10 to +60°C, from 14 to 140°F)± 3.0%
CommunicationSiCOM
Dimensions125 x 70 x 22 mm
Dimensions (imperial)4.92 x 2.75 x 0.86 in
Battery connectionM10 bolts

SKU: SI-SC303
Barcode: 3830067940653
Model #: SI-SC303
MPN: SI-SC303

WARRANTY

SIMARINE Warranty Policy

This warranty policy applies to SIMARINE products supplied by us in Australia. SIMARINE products supplied by us are covered by a 36 month international manufacturer warranty from the date of purchase, subject to the product being used, installed, stored and maintained correctly and in accordance with the manufacturer's instructions.

This warranty applies to the original end-user purchaser of the product, as evidenced by a valid proof of purchase. The benefits given by this warranty are in addition to other rights and remedies available under law.

Warranty Coverage and Periods

This warranty covers SIMARINE battery monitoring, tank monitoring, digital switching and related system monitoring products supplied by us. The warranty periods for each product model range are set out below.

SIMARINE Product Model Range Warranty Length Application / Notes
SIMARINE PICO Battery Monitor Range 36 months Applies to SIMARINE PICO battery monitors, PICO display units and PICO monitoring kits where installed and operated in accordance with the manufacturer's instructions.
SIMARINE VIA Digital Switching Range 36 months Applies to SIMARINE VIA digital switching control panels and compatible VIA digital switching components where used within the product's rated specifications.
SIMARINE Nereide 2 Digital Switching Range 36 months Applies to SIMARINE Nereide 2 distribution units, control panels and associated digital switching equipment where correctly installed and used as intended.
SIMARINE Combo Shunt Modules SC303 and SC503 36 months Applies to SIMARINE SC303 and SC503 combo shunt modules where installed with suitable wiring, protection and connected equipment.
SIMARINE Quadro Shunt Modules SCQ25, SCQ25T and SCQ50 36 months Applies to SIMARINE SCQ25, SCQ25T and SCQ50 shunt modules where used within their rated current, voltage and environmental specifications.
SIMARINE Tank Level and Voltage Module ST107 36 months Applies to SIMARINE ST107 tank level and voltage modules where connected to compatible sensors and installed in accordance with the manufacturer's instructions.
SIMARINE Tank Senders and Tank Sensors 36 months Applies to SIMARINE tank senders, tank sensors and compatible tank level accessories where correctly selected, installed and used for the intended tank application.
SIMARINE Inclinometer SDI 36 months Applies to SIMARINE SDI inclinometer modules where installed, configured and operated in accordance with the manufacturer's instructions.
SIMARINE NMEA 2000 Gateway SN01 36 months Applies to SIMARINE SN01 NMEA 2000 gateway modules where connected to compatible equipment and used within the product's rated specifications.
SIMARINE Accessories, Cables, Sensors and Ancillary Components 36 months Applies to SIMARINE accessories supplied by us, including compatible cables, temperature sensors, covers, connectors, light switches and other ancillary SIMARINE components.

The warranty period begins on the date of purchase by the original end-user, as shown on the valid proof of purchase. A valid proof of purchase is required for all warranty claims.

Installer Responsibilities and System Design

SIMARINE products are commonly installed, connected, programmed, configured or integrated into a broader electrical system, vehicle, vessel, caravan, motorhome, camper, canopy, switch panel, battery system or monitoring network. Once installed, the product may form only one component of a larger system.

We do not provide installation services unless expressly stated in writing, and we do not supervise or control installation practices carried out by dealers, installers, contractors or end-users. The installer, system designer, integrator, dealer or end-user is responsible for ensuring that the product is suitable for the intended application and is installed correctly.

Issues or damage arising from incorrect installation, poor system design, incorrect configuration, incompatible equipment, inadequate protection, unsuitable mounting, unsuitable environmental conditions or failure to follow the manufacturer's instructions are not product defects and are not covered by this warranty.

Appropriate Installation

All SIMARINE products must be installed in accordance with the product manual, the manufacturer's installation instructions, applicable Australian Standards, relevant electrical, automotive, marine or industry standards, and recognised industry best practice.

The installer must ensure that the product is used in an appropriate environment and within its specified ratings. Improper, unsafe, unlicensed, sub-standard or non-compliant installation may void or limit warranty coverage.

System Compatibility

The installer or integrator is responsible for selecting and using compatible components. This includes ensuring compatibility with batteries, shunts, tank senders, chargers, inverters, solar controllers, digital switching equipment, NMEA 2000 networks, wiring, fuses, circuit breakers, sensors, displays, software, firmware and any other connected equipment.

Damage, incorrect readings, communication faults, underperformance or failure caused by incompatible, incorrectly configured, undersized, oversized, unsuitable or improperly installed equipment is not covered by this warranty.

System-Wide Performance

Overall system performance depends on design, installation, configuration, calibration, usage, maintenance and environmental factors beyond the SIMARINE product itself. This warranty covers the quality of the individual SIMARINE product supplied by us only. It does not guarantee the performance of the broader electrical, monitoring or switching system into which the product is installed or integrated.

Issues such as inaccurate readings, incorrect tank levels, incorrect battery state of charge, communication errors, nuisance alarms, intermittent operation, voltage drop, overheating, instability, switching faults or operational shortfalls caused by system design, installation, calibration or configuration are outside the scope of this warranty.

Installation Location and Environmental Suitability

The installer must ensure that SIMARINE products are mounted, located, supported, ventilated and protected in a manner suitable for the installation environment.

Where relevant, the installer must allow for heat dissipation, ventilation, moisture exposure, dust, vibration, corrosion risk, electrical clearance, mechanical loading, access for inspection and service, and protection from unsuitable environmental conditions.

Damage caused by unsuitable mounting, inadequate ventilation, moisture, water ingress, dust, corrosion, excessive heat, vibration, insufficient clearance, unsuitable substrate selection or other installation environment issues is not a manufacturing defect and is not covered by this warranty.

System Protection and Fault Isolation

The installer must incorporate suitable protective devices and design measures appropriate to the product and installation type. This may include correctly rated fuses, circuit breakers, isolators, over-current protection, over-voltage protection, low-voltage protection, surge protection, correct cable sizing and other protective devices required by standards or best practice.

The installer is responsible for ensuring that a fault or failure in one component does not cause cascading damage to other components. Damage to SIMARINE products caused by inadequate system protection, poor fault isolation, incorrect protection settings or missing safety devices is not covered by this warranty.

Service Accessibility Requirement

Products must be installed in a manner that allows reasonable access for inspection, testing, servicing, removal and replacement. We are not responsible for additional labour, structural modification, access equipment, removal of fixtures, cabinetry, panels, flooring, trim, sealants, adhesives or other costs arising from installation methods that restrict reasonable access to the product.

Installation Documentation

We may require documentation of the installation when assessing a warranty claim. This may include photos of the product in its installed location, wiring diagrams, system layout, serial numbers, details of connected equipment, installer details, commissioning records, configuration settings, calibration details, service history, fault logs and maintenance records.

Failure to provide reasonable installation evidence may limit our ability to assess the claim.

Independence of Dealers and Installers

Dealers, resellers, installers and contractors act independently and are not agents, employees or representatives of SIMARINE or us unless expressly agreed in writing. We are not responsible for the acts, omissions, workmanship, advice, representations, installation practices or system design decisions of independent dealers, resellers, installers, contractors or third parties.

What This Warranty Does Not Cover

This warranty covers manufacturing defects or failures of the product arising from normal use in accordance with the manufacturer's instructions. It does not cover any failure, damage, performance issue, deterioration or loss caused wholly or partly by external factors, misuse, incorrect installation or circumstances outside the manufacturer's control.

  • Incorrect installation, wiring, connection or configuration
  • Incorrect product selection or application
  • Use outside the product's intended purpose
  • Operation outside the product's rated technical specifications
  • Incorrect voltage, current, load, sensor type, tank sender type or configuration
  • Failure to follow the manufacturer's storage, usage, installation, use or maintenance instructions
  • Improper operation, misuse, abuse or neglect
  • Physical impact, accidental damage or mechanical damage
  • Unauthorised modification, alteration, tampering, disassembly or repair
  • Service work carried out by a third party not authorised by the manufacturer
  • Use with incompatible, incorrectly rated or improperly configured third-party components
  • Damage caused by inadequate fusing, circuit protection, isolation or system protection
  • Damage caused by moisture, water ingress, dust, corrosion or unsuitable installation environments
  • Damage caused by excessive heat, inadequate ventilation or installation in an unsuitable location
  • Damage caused by vibration, movement, poor mounting or inadequate support
  • Normal wear and tear, cosmetic deterioration or gradual degradation consistent with normal use
  • Failure to carry out reasonable inspection, cleaning, maintenance, firmware updates or servicing where required
  • Products with removed, altered, damaged or illegible serial numbers, rating labels or identification markings
  • Products purchased second-hand, from unauthorised channels, auction sites, liquidation sales or grey-market sources
  • Labour costs for removal, replacement, reinstallation or diagnosis
  • Freight, travel, call-out costs or access costs unless otherwise required by law
  • Products not returned for assessment when reasonably required
  • Consequential or incidental loss, including damage to other equipment, downtime, loss of use, loss of revenue or economic loss, to the extent permitted by law

Warranty Assessment and Remedy

If a SIMARINE product supplied by us is found to be defective within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit, refund or another appropriate remedy, depending on the nature of the fault and the requirements of Australian Consumer Law.

Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase, product details, serial number if available, installation information and a clear description of the fault.

If the product is required to be returned to SIMARINE, an importer, distributor or another nominated assessment location for inspection or repair, a return authorisation process may be required before the product is sent. Products sent without the required return authorisation or documentation may not be processed.

Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.

Making a Warranty Claim

If you suspect a fault with a SIMARINE product supplied by us, do not immediately remove or uninstall the product unless it is unsafe to leave it in place or unless authorised as part of the warranty process. Premature removal may cause further damage or make it difficult to determine the original cause of the issue.

  1. Contact us: Contact us with your dated proof of purchase, product model, serial number if available, and a description of the fault.
  2. Provide product and installation information: We may request installation photos, wiring details, connected equipment details, operating settings, configuration details, calibration details, fault codes, measurements or service history to assist with assessment.
  3. Assessment and troubleshooting: We may ask for safe checks, photos, testing information or other details to determine whether the issue appears to be a product fault or is caused by installation, configuration, connected equipment, environment or misuse.
  4. Return for inspection if required: If the fault cannot be confirmed remotely, the product may need to be returned for inspection, testing, repair or replacement assessment. Return instructions will be provided where required.
  5. Outcome: If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy. If the product is found not to be faulty, or the issue is caused by an excluded factor, the claim may be rejected.

Remedies Under Warranty

If a defect covered by this warranty is confirmed, we may provide one or more of the following remedies, subject to the circumstances of the claim and the requirements of Australian Consumer Law:

  • repair of the product;
  • replacement of the product;
  • store credit;
  • refund;
  • supply of replacement parts; or
  • another appropriate remedy required by law.

Repair or replacement under this warranty does not restart or extend the original warranty period. The warranty continues from the original purchase date.

Manufacturer, Importer or Distributor Support

SIMARINE products may be assessed, repaired or replaced through the manufacturer, importer, distributor or another nominated service process. Where available, we may assist customers in arranging assessment, but any manufacturer, importer or distributor service is subject to their own process, requirements and continued availability.

Australian Consumer Law

This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

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