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Blue Sea 12V 500A ML Series Solenoid Battery Isolator
Blue Sea 12V 500A ML Series Solenoid Battery Isolator
Zero Standby Draw Magnetic Latching - Silver Alloy Contacts
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$379.93
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DESCRIPTION
High-Capacity 12V Battery Switching with Zero Standby Draw
Managing high-amperage DC systems in marine, caravan, and commercial vehicle environments requires reliable, heavy-duty isolation. The Blue Sea ML Series Solenoid Battery Isolator is engineered to handle demanding 500A continuous loads, making it ideal for isolating engine cranking batteries, high-output inverters, and substantial house battery banks. It also serves as a dependable solution for emergency battery combining when starting power is depleted.
Unlike conventional solenoids that require a constant electrical current to remain engaged, this unit utilises advanced magnetic latching (bi-stable) technology. It draws zero current while holding in the ON or OFF state, only consuming power during the brief moment the state is changed. This eliminates parasitic battery drain, preserving valuable storage capacity during extended off-grid stays or periods when the vessel or vehicle is in storage.
Engineered for Harsh Marine and Off-Grid Environments
Standard isolators often suffer from voltage drop, overheating, and premature contact wear when subjected to high inrush currents from large inverters or winches. The Blue Sea 7701B addresses these risks by incorporating internal silver alloy contacts, which provide superior reliability and arc resistance when switching live loads under heavy demand.
External connections are secured via heavy-duty 3/8"-16 (Approx. M10) tin-plated copper studs. The tin plating provides vital corrosion resistance in salt-air and humid environments, while the copper core ensures maximum conductivity and minimal heat generation. With a generous 7/8" (22mm) stud length, installers can easily land multiple heavy-gauge cable lugs on a single terminal without compromising thread engagement.
Key Features and Benefits
- 500A Continuous Rating: Easily manages high-demand 12V DC circuits, including large inverters, bow thrusters, and starter motors.
- Magnetic Latching Mechanism: Bi-stable design draws no current in the ON or OFF position, preventing unwanted battery discharge.
- Silver Alloy Contacts: Delivers exceptional durability and safe switching of live loads without contact welding.
- Tin-Plated Copper Studs: 3/8"-16 (Approx. M10) terminals resist marine corrosion and offer 7/8" (22mm) of length to accommodate multiple heavy-duty cable terminals.
- Integrated Control Harness: Equipped with wiring for remote operation and status LED feedback to monitor system state from a cabin or helm.
- Circuit Identification: Features a recessed area for clean labelling, ensuring clear organisation within complex electrical distribution panels.
Installation and System Integration
Designed for seamless integration into professional 12V DC electrical architectures, this remote battery switch allows you to mount the heavy solenoid close to the battery bank, keeping heavy-gauge cable runs as short as possible to reduce voltage drop and installation costs. You can then control the isolator remotely from a convenient dashboard or control panel location.
Please note: The ML-Series Remote Control Contura Switch required for remote actuation is not included with this unit and is available separately.
Upgrade your 12V power distribution system with the Blue Sea ML Series 500A Solenoid Isolator for safe, zero-drain control over your critical battery banks and heavy DC loads.
SKU: BS-7701B
SPECIFICATIONS
| Specification | Details |
|---|---|
| Product type | Solenoid battery isolator |
| Voltage rating | 12V DC |
| Current rating | 500A continuous |
| Isolator technology | Magnetic latching |
| Current draw | No current draw in ON or OFF state; draws current only when changing state |
| Contacts | Silver alloy |
| Connection | 3/8″-16 tin-plated copper studs |
| Stud length | 7/8″ (22mm) |
| Remote control switch | Contura switch not included; available separately |
| Stated applications | Engine, inverter and house loads; emergency battery combining |
| SKU: | BS-7701B |
| Model #: | BS-7701B |
| MPN: | BS-7701B |
| Package weight: | 1.32 kg |
| Package length: | 0.15 m |
| Package width: | 0.12 m |
| Package height: | 0.12 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, 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 and a clear description of the fault.
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
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms 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.
DOCUMENTS
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