Description
Bluewater 12V 140A Auto Charging Relay | Boat Supply Store
Optimize your vessel's battery performance with automatic management of multiple battery banks. This relay ensures your starter battery is always ready for ignition while safeguarding sensitive navigation electronics from voltage fluctuations. With a 140 AMP intermittent and 120 AMP continuous rating, it effectively supports high-output alternators. Its IP67 waterproof and ignition-protected design is engineered for reliability in challenging marine environments, ideal for offshore sportfishing boats operating out of Galveston.
Key Features
- Automates dual battery charging and isolation.
- Protects sensitive electronics with integrated Start Isolation (SI).
- Ensures battery readiness with Under Voltage Lockout (UVLO).
- Supports high-output alternators up to 120A.
- Provides clear status indication via dual-color LEDs.
- Offers robust environmental protection with IP67 waterproofing.
- Guarantees safety with ignition-protected design.
- Simplifies complex battery setups for reliable power.
Specifications
| Product Specifications | |
|---|---|
| Voltage | 12V |
| Intermittent Rating | 140 AMP |
| Continuous Rating | 120 AMP |
| Max Voltage | 48VDC |
| Cable Compatibility | 4/0 AWG |
| Features | Automatic charging, Start Isolation, Dual-color LEDs, Under Voltage Lockout |
| Waterproof Rating | IP67 |
| Ignition Protected | Yes |
Who This Is For
Boaters with dual battery systems, including sailboat owners managing house and starting banks, and fishing vessel operators needing to protect trolling motor and accessory power sources. This relay is designed for those requiring robust, automatic battery management in marine applications.
How It Compares
| Feature | Bluewater 12V 140A Auto Charging Relay | Blue Sea Systems ML |
|---|---|---|
| Continuous Rating | 120 Amps | 120 Amps, 120 Amps |
| Intermittent Rating | 140 Amps | 140 Amps, 200 Amps |
| Max Voltage | 48VDC | 32V DC, 24V DC |
| Waterproof Rating | IP67 | IP67, IP65 |
| Start Isolation (SI) | Yes | Yes, No |
Common Concerns Answered
Is the LED indicator system intuitive?
While the dual-color LEDs provide real-time status, consulting the manual is recommended for precise interpretation of specific indicator meanings, ensuring you fully understand battery charging states.
What are the installation requirements regarding cable size?
Optimal performance is achieved with proper cable gauge; users report that ensuring correct wire sizing, particularly for 4/0 AWG cable compatibility, is crucial for efficient operation.
Is this unit as robust as manual switches?
This automatic relay offers advanced protection and convenience beyond manual switches, including Start Isolation and Under Voltage Lockout, vital for protecting sensitive marine electronics in demanding conditions.
Frequently Asked Questions
How does the Bluewater Auto Charging Relay manage battery charging?
It automatically senses when the engine is running and the starting battery is receiving charge, then connects the house battery bank to also charge, isolating them when the engine stops.
What is Start Isolation (SI) and how does it protect electronics?
Start Isolation prevents the house battery from discharging into sensitive electronics while the engine is off and the starting battery is also isolated, preventing voltage dips that could cause resets or damage.
What are the continuous and intermittent amperage ratings of this relay?
The Bluewater Auto Charging Relay has a continuous amperage rating of 120 AMPs and an intermittent rating of 140 AMPs.
Is the Bluewater Auto Charging Relay waterproof and ignition protected?
Yes, this relay features an IP67 waterproof rating, making it suitable for exposed marine locations, and is ignition protected for safe installation in engine spaces.
What are the primary applications for the Bluewater Auto Charging Relay?
Ideal for boats with dual battery systems, including sailboats with separate house and starting batteries, and fishing boats needing to protect trolling motor and accessory batteries from discharge.
