Description
Dual Battery Isolator Kit | Boat Supply Store
Maintain independent charging of two marine battery banks to prevent critical electronics failure during extended offshore voyages. This isolator kit facilitates simultaneous charging of both your engine start and deep-cycle house batteries, ensuring the start battery remains fully charged. It operates with a continuous rating of 120A, preventing voltage drop below 13.2V during charging and maintaining optimal battery health for your vessel operating in saltwater environments.
Key Features
- Prevents discharge of start battery by house loads
- Ensures reliable engine starting power
- Allows simultaneous charging of dual battery banks
- Protects sensitive marine electronics
- Maximizes battery longevity and performance
- Facilitates efficient power distribution on board
- Designed for robust marine applications
- Simplifies complex battery management systems
Specifications
| Product Specifications | |
|---|---|
| Continuous Rating | 120A |
| Charging Voltage Drop | < 13.2V |
| System Voltage | 12V |
Who This Is For
Boaters requiring reliable independent power for engine starting and auxiliary systems, such as those utilizing extensive navigation equipment or trolling motors. Essential for those who wish to safeguard against sudden power loss to critical onboard functions.
How It Compares
| Feature | Dual Battery Isolator Kit | Blue Sea Systems |
|---|---|---|
| Continuous Rating | 120A | 120A |
| Charging Voltage Drop | < 13.2V | < 0.7V |
| System Voltage | 12V | 12V |
Common Concerns Answered
Will this isolator drain my batteries when not charging?
No, a properly installed battery isolator, like the HARDLINE PRODUCTS MDBI-2, is a diode-based device that prevents current flow from one battery bank to another when charging is not occurring. It is designed to maintain the separation of your battery banks.
Is this isolator suitable for a boat with a large engine and multiple electronics?
Yes, the HARDLINE PRODUCTS MDBI-2 features a continuous rating of 120A, making it robust enough for boats with significant electrical demands, including large engines and extensive electronic suites. It ensures your start battery remains dedicated to engine function.
What if I have a modern smart alternator?
While many isolators are compatible with standard alternators, newer smart alternators may require specific charging profiles. It is recommended to verify compatibility with your specific smart alternator model to ensure optimal charging performance. Consult the manual or manufacturer if unsure.
Frequently Asked Questions
What is the primary function of a dual battery isolator?
A dual battery isolator automatically directs charging current from the alternator to both battery banks while preventing the discharge of the start battery by auxiliary equipment, ensuring the engine can always be started.
What is the maximum continuous current this isolator can handle?
The HARDLINE PRODUCTS MDBI-2 is rated for a continuous current of 120A, ensuring it can manage the charging demands of most standard marine electrical systems.
What is the acceptable voltage drop when charging with this isolator?
This isolator is designed to minimize voltage drop, ensuring it stays below 13.2V during the charging process, which is critical for efficient battery charging and longevity.
Can this isolator be used with a 24V or 36V system?
No, this specific model, the MDBI-2, is designed for 12V DC systems only. Using it with higher voltage systems could result in damage and is not recommended.
How does this isolator prevent one battery from draining the other?
It utilizes diodes to create a one-way flow of current. When the alternator is charging, current is sent to both batteries. When the engine is off and loads are applied to the house battery, the diodes prevent power from flowing back from the start battery.
