1. Introduction
The Sterling Pro Split R is an advanced intelligent digital alternator distribution system designed to efficiently manage power distribution from your alternator to multiple battery banks. It ensures optimal charging with a negligible 0.0V voltage drop, a significant improvement over traditional diode-based splitting systems. This manual provides essential information for the installation, operation, and maintenance of your Pro Split R system.
2. Key Features
- 0.0V Drop Performance: Achieves a negligible voltage drop across the current range, ensuring superior charging efficiency compared to older diode-based systems.
- Overload Design: Engineered with robust overload capabilities; for instance, the 180A model is continuously rated for 240A with overload capacity exceeding 2000A.
- Universal Compatibility: Suitable for use with all types of alternators and battery chemistries. Features a simple B+ plug and play connection.
- Fail-Safe Operation: In the unlikely event of unit failure, the engine start battery and alternator remain directly connected, ensuring continuous power for critical systems. The system prioritizes charging of the engine start battery.
- IP66 Waterproof Rating: Fully protected against dust ingress and powerful water jets, making it suitable for harsh environments.
3. Product Overview
Figure 1: Front view of the Sterling Pro Split R unit. This image displays the main connections for the alternator input, starter battery, and two additional battery banks (Batt 2, Batt 3). It also shows indicator LEDs for battery status and system operation, along with the IP66 waterproof rating and Sterling Power Products branding.
Figure 2: Internal view and feature diagram of the Sterling Pro Split R. This diagram highlights key internal components and explains features such as 0.0V drop, overload design, fail-safe mechanism, and faster battery charging. It also includes a table detailing different Pro Split R models based on current and battery bank configurations.
4. Installation and Setup
The Pro Split R system is designed for straightforward installation. It acts as an intelligent distribution system between your alternator and multiple battery banks.
4.1 Wiring Connections
Connect the alternator output to the "Alt in" terminal. The engine start battery connects to the "Start Batt" terminal. Additional battery banks (e.g., domestic batteries) connect to "Batt 2" and "Batt 3" terminals. Ensure all connections are secure and properly insulated.
Figure 3: Wiring diagrams illustrating typical connections for the Sterling Pro Split R. These diagrams show how the alternator, engine battery, and domestic batteries are connected to the unit, demonstrating the intelligent splitting and charging process. The diagrams also highlight the negligible voltage drop achieved by the system.
4.2 Mounting
Mount the unit in a secure location, away from excessive heat or vibration. Given its IP66 rating, it is suitable for environments where exposure to water jets or dust is possible.
5. Operation
Once installed, the Pro Split R operates automatically to manage charging. It intelligently distributes the alternator's output to the connected battery banks, ensuring each bank receives optimal charge without voltage drop.
- Battery Prioritization: The system prioritizes charging the engine start battery before distributing power to other battery banks.
- LED Indicators: The front panel features LEDs that indicate the status of each battery bank (e.g., "Battery on line", "High alt V trip"). Refer to Figure 1 for LED locations.
- Advanced Regulation: The Pro Split R's advanced intelligent digital regulator ensures precise voltage control and efficient charging.
6. Maintenance
The Sterling Pro Split R is designed for minimal maintenance. Periodically inspect all wiring connections to ensure they are tight and free from corrosion. Keep the unit clean and free of debris. No user-serviceable parts are inside.
7. Troubleshooting
- Unit Failure (Fail-Safe): In the event of an internal unit failure, the Pro Split R is designed to bypass itself, ensuring that the engine start battery remains connected directly to the alternator. This allows the engine to continue running and provides power to essential systems.
- LED Indicators: Observe the LED indicators on the front panel (Figure 1) for diagnostic information. For example, "High alt V trip" indicates an over-voltage condition.
- No Charging: Check all wiring connections, especially the alternator input and battery terminals. Ensure the alternator is functioning correctly.
8. Specifications
| Specification | Value |
|---|---|
| Model Number | PSR123 |
| Brand | STERLING |
| Style | 12V - 120A (3 bank) |
| Item Weight | 1 Pounds |
| Item Dimensions (LxWxH) | 6 x 6 x 3 inches |
| Package Weight | 16 ounces |
| Color | Grey / Red |
| Manufacturer | Sterling Power |
| Date First Available | June 14, 2012 |
9. Warranty and Support
Specific warranty details are not provided in the product information. Please refer to the manufacturer's official website or contact Sterling Power customer support for warranty information and technical assistance.
For further inquiries, visit the Sterling Power website.
10. Legal Disclaimer
Warning: This product may contain materials cautioned by California Proposition 65.
