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Batterylink ACR Relay 120A 12/24V
Key Features:
Automatic Charging Relay: The BatteryLink ACR Relay automatically shares a single charge source with the auxiliary battery, supporting 12V/24V DC and 120A.
Continuous and Intermittent Ratings: It has a 120A continuous rating and a 210A intermittent rating for 5 minutes, with a maximum cable size of 1/0 AWG.
Voltage and Amperage: The relay operates at 12V/24V DC with specific combine and open voltage thresholds, and has an operating current of 175mA at 12V and 115mA at 24V.
Durable Design: Features include side and bottom knockouts for cable connections, a clip-on cover for insulation, a 7∕8″ stud length for multiple terminals, and integrated LED status indicators.
Optional Features: Includes an optional Auxiliary Battery Priority connection to extend auxiliary battery use, and a remote LED indicator for ACR status (requires optional LED).
| BatteryLink™ Automatic Charging Relay – 12V/24V DC 120A | |
|---|---|
| Nominal Voltage | 12V DC 24V DC |
| Auxiliary Battery Priority | Yes |
| Amperage Operating Current | 175mA @ 12V (Combine) 115mA @ 24V (Combine) 15mA (Open) |
| Continuous Rating | 120A |
| Intermittent Rating | 210A (5 min) |
| Maximum Cable Size | 1/0 AWG |
| Maximum Torque | 140 in-lb (15.82 Nm) |
| Terminal Stud Size | 3/8″ – 16 (M10) |
| Relay Contact Position | |
| Combine 30 sec | 13.6V @ 12V 27.2V @ 24V |
| Combine 2 Min | 13.0V @ 12V DC 26.0V @ 24V DC |
| Over Voltage Lockout | 16.0V @ 12 V 32.0V @ 24 V |
| Open Low | 12.75V @ 12 V 25.5V @ 24 V |
| Auxiliary Priority | |
| Open Low | 12.25V @ 12V 24.5V @ 24V |
| Weight | 0.57 kg |
BatteryLink™ Automatic Charging Relay – 12V/24V DC 120A
Automatically shares single source of charge with Auxiliary Battery Features
- 120 Amp continuous rating
- 12/24V DC auto ranging voltage input
- Senses charging on two battery banks
- Side and bottom knockouts for cable connections
- Clip-on cover insulates terminal connections
- 7∕8″ (22 mm) stud length to accept multiple cable terminals
- Integrated LED indicates ACR status
- 1∕4″ × .032″ male quick connect terminals for ground and optional features
- Largest battery bank cannot exceed Group 27
Optional Features
- Optional Auxiliary Battery Priority connection shares the alternator charge with the Auxiliary battery longer when the engine is running to allow the use of auxiliary loads for an extended period of time
- Remote LED remotely indicates ACR states – requires optional LED

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Batterylink™ Automatic Charging Relay – 12v/24V DC 120A
$208.78
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