Description
Newmar ERC-12-35 Emergency Relay | Boat Supply Store
This unit guarantees continuous operation of critical communications equipment during unforeseen AC power interruptions or DC voltage supply failures. Its fast-acting S.P.D.T. relay automatically switches to a standby battery source, ensuring vital links remain active. Furthermore, it incorporates a 0.1A typical trickle charge function to actively maintain battery health, all within a compact 5-1/8" x 2-7/8" x 3-5/8" housing.
Key Features
- Automatic switching to standby battery upon DC voltage loss
- Fast-acting S.P.D.T. relay ensures rapid transition
- Integrated trickle battery charger function
- Maintains battery float voltage at 0.7 volts lower than power supply voltage
- Versatile mounting in any orientation
- Isolated inputs and outputs from mounting bracket
- Reliable backup power for essential marine electronics
- Compact and durable construction for marine environments
Specifications
| Product Specifications | |
|---|---|
| 12VDC input range | 10.0-14.5 VDC |
| Continuous relay rating | 30A |
| Intermittent relay rating | 35A |
| Typical float trickle charge | 0.1A |
| Dimensions | 5-1/8" x 2-7/8" x 3-5/8" |
| Weight | 1.15 lbs |
Who This Is For
Boat owners and marine electronics installers requiring a dependable automatic power transfer solution for vital communications gear. This unit ensures uninterrupted operation for vessels where maintaining radio or navigation system integrity during power fluctuations is paramount.
How It Compares
| Feature | Newmar ERC-12-35 Emergency Relay | Blue Sea Systems 7700 Automatic Charging Relay |
|---|---|---|
| Primary Function | Emergency backup power for communications equipment & trickle charger | Automatic battery charging and combining, Battery combining and isolation |
| Max Continuous Amperage | 30 amps | 120A, 120A |
| Intermittent Amperage | 35 amps | null, null |
| Trickle Charge Function | Yes (0.1 amps typical) | No, No |
| Input Voltage Range | 10.0-14.5 VDC (12V) | 12/24V DC, 12/24V DC |
| Mounting Orientation | Any | Vertical recommended, Vertical recommended |
Common Concerns Answered
Is the trickle charge sufficient for a deeply discharged battery?
The 0.1A typical trickle charge is designed to maintain battery float voltage, not to rapidly recharge a deeply discharged battery. For significantly depleted batteries, a supplemental, higher-amperage charger may be necessary.
What are the critical wiring considerations?
Proper wire gauge selection is crucial for optimal performance and to prevent voltage drop. Consult the installation manual for specific recommendations to ensure the relay operates as intended.
How does the Newmar ERC-12-35 handle power interruptions?
Upon detecting a loss of DC voltage from the primary power supply, the ERC-12-35 utilizes a fast-acting S.P.D.T. relay to seamlessly switch the load to a designated standby battery, ensuring continuous power for connected equipment.
Frequently Asked Questions
How does the Newmar ERC-12-35 ensure continuous power to communications equipment?
The ERC-12-35 monitors the primary DC voltage; if it drops below a predetermined threshold, the unit automatically switches the communications equipment to an auxiliary battery source via its S.P.D.T. relay, maintaining uninterrupted operation.
What is the purpose of the trickle charger function on the ERC-12-35?
The trickle charger function maintains the standby battery at its optimal float voltage, which is typically 0.7 volts lower than the primary power supply voltage, preventing overcharging while ensuring the battery remains ready for immediate use.
Can the ERC-12-35 be mounted in any orientation?
Yes, the Newmar ERC-12-35 is designed with isolated inputs and outputs from the mounting bracket, allowing for versatile mounting in any orientation on a vessel.
What is the recommended wire gauge for installing the ERC-12-35?
Refer to the installation manual (URL provided) for precise wire gauge recommendations based on current draw and cable length to ensure efficient power transfer and prevent voltage drop.
What happens if the backup battery becomes significantly discharged during an extended power outage?
While the ERC-12-35 provides backup power, its trickle charge function is for maintenance, not rapid replenishment. A significantly discharged backup battery may require external charging from a dedicated charger to be fully restored before the primary power is re-established.
