Renogy Battery Shunt 300 User Manual

1. General Information

1.1. Symbols Used

[WARNING] Indicates a potentially dangerous condition which could result in injury or death.

[CAUTION] Indicates a critical procedure for safe and proper installation and operation.

[NOTE] Indicates an important step or tip for optimal performance.

1.2. Introduction

Renogy Battery Shunt 300 is an intelligent battery monitor that measures the battery voltage and current based on which it calculates the state of charge (SOC) and remaining running time of the battery.

The shunt records historical charging and discharging data such as full deep discharge cycle, discharge capacity, charge cycle, and battery temperature. With the built-in Bluetooth module, it communicates with the DC Home app and Renogy ONE, allowing real-time monitoring and parameter customization (nominal capacity, deep discharge thresholds, temperature alarms, SOC alarms).

1.3. Key Features

• Universal Battery Compatibility: Works with Lead Acid (AGM, GEL), Lithium Iron Phosphate, Lithium-ion, and Nickel-metal hybrid batteries.
• Comprehensive Battery Insights: Provides State of Charge (SOC), voltage, current, energy, remaining time, temperature, and starter battery voltage.
• Alarm and Historical Data: Records historical data and offers alerts for abnormal conditions via the DC Home app.
• Convenient Remote Monitoring: Enables remote monitoring and control via Renogy ONE and the DC Home App using Bluetooth connectivity.
• Effortless Installation and Configuration: Simplifies installation and settings adjustments through the DC Home app for a user-friendly experience.

1.4. SKU

Renogy Battery Shunt 300: RSHST-B02P300-G1

2. Get to Know Renogy Battery Shunt 300

2.1. What's In the Box?

• Renogy Battery Shunt 300 x 1
• Quick Guide x 1
• ST4 x 18 mm Mounting Screws x 3 (1 extra)
• 3/8 in (M10) B1/B2 Wires (1m) (22 AWG) x 2
• Temperature Sensor (1.5m) x 1

[NOTE] Ensure all accessories are complete and free of any signs of damage.

The accessories and product manual are crucial for installation. Package contents may vary by model.

2.2. Required Tools & Accessories

Tools: Wrench (11/16 in), Phillips Screwdriver (#1), Slotted Screwdriver (1 mm), Insulating Gloves, Wire stripper, Manual Hydraulic Pliers, Heat Gun.

Accessories: Heat Shrink Tubing, Bare Wires x 2, 3/8 in Lugs (M10 Ring Terminals) x 2.

[NOTE] Prior to installation, prepare recommended tools and accessories.

[NOTE] Refer to section "3.4. Size Bare Wires" for sizing bare wires.

[NOTE] Refer to section "3.5. How to Install 3/8 in Lugs?" for lug installation.

[NOTE] For connection methods and tools for auxiliary/starter batteries and equipment terminals, consult the specific device's user manual. Diagrams are for illustration only.

2.3. Product Overview

Exterior

Components include: Upper Cover, Mounting Hole, Lower Cover, B- Terminal (M10), B1 and B2 Terminals, Battery Temperature Sensor (T1) Port, Mounting Hole, Power LED Indicator, Bluetooth LED Indicator, RESET Button.

Interior (with the covers removed)

Components include: B- Terminal (M10), B1 and B2 Terminals, Battery Temperature Sensor (T1) Port, P- Terminal (M10).

2.4. System Setup

Connecting to a Main Battery Only

Diagram shows the shunt connected to a main battery. The B- terminal connects to the main battery negative. The P- terminal connects to the loads/chargers/inverters. The AUX BAT+ and AUX BAT- terminals are for connecting to an auxiliary battery's positive and negative terminals respectively.

Connecting to Both a Main Battery and a Starter Battery

Diagram shows the shunt connected to a main battery and a starter battery. The B- terminal connects to the main battery negative. The B2 terminal connects to the starter battery positive. The P- terminal connects to loads/chargers/inverters. The AUX BAT+ and AUX BAT- terminals are for connecting to an auxiliary battery's positive and negative terminals respectively. The shunt detects voltage from both batteries.

Connecting to Multiple Main Batteries

Diagram shows the shunt connected to multiple main batteries in parallel. The B- terminal connects to the combined negative of the main batteries. The P- terminal connects to loads/chargers/inverters. The B1 terminal connects to the positive of one main battery. The B2 terminal can connect to a starter battery (optional). The AUX BAT+ and AUX BAT- terminals are for connecting to an auxiliary battery's positive and negative terminals respectively. Ensure combined continuous current does not exceed 300A and voltage is below 120V.

Main batteries in series

Diagram shows the shunt connected to multiple main batteries in series. The B- terminal connects to the combined negative of the main batteries. The P- terminal connects to loads/chargers/inverters. The B1 terminal connects to the positive of one main battery. The B2 terminal can connect to a starter battery (optional). The AUX BAT+ and AUX BAT- terminals are for connecting to an auxiliary battery's positive and negative terminals respectively. Ensure continuous current does not exceed 300A and total voltage is below 120V.

3. Preparation

3.1. Plan a Mounting Site

Select a clean, cool, and dry location, free from water, oil, or dirt. Avoid placing near metal objects for optimal Bluetooth communication.

[WARNING] Install indoors and prevent exposure to direct sunlight.

[WARNING] Do not expose to flammable or harsh chemicals or vapors.

[WARNING] Keep out of reach of children.

[CAUTION] Ensure installation within ambient temperature range of -4°F to 122°F (-20°C to 50°C).

[CAUTION] Ensure installation in an environment with relative humidity between 0% and 95% and no condensation.

3.2. Check Renogy Battery Shunt 300

Inspect for damage (cracks, dents, deformation). Ensure connector contacts are clean, dry, and free of dirt/corrosion.

[WARNING] Do not use if damaged.

[CAUTION] No serviceable parts. Do not open, dismantle, repair, or modify.

[CAUTION] Wear proper protective equipment and use insulated tools during installation.

[NOTE] Do not dispose of as household waste. Comply with local, state, and federal laws and regulations and use recycling channels.

3.3. Check System Voltage and Current

Ensure operation within 8V to 120V DC and up to 300A continuous current. Exceeding limits may damage the shunt.

[WARNING] Risk of electric shock! Turn off all devices and ensure no current is flowing before installation.

3.4. Size Bare Wires

[NOTE] Values are from NEC Table 310.17 for copper cables rated at 194°F (90°C) at ambient temps up to 86°F (30°C). Longer cables may require thicker gauge wires.

3.5. How to Install 3/8 in Lugs?

Step 1: Strip approximately 0.4 inches (10 mm) of insulation from the end of a bare wire using a wire stripper.

Step 2: Thread the exposed bare wire through a piece of heat shrink tubing.

Step 3: Attach a 3/8-inch lug onto the end of the bare wire.

Step 4: Securely crimp the lug onto the bare wire using a manual hydraulic pliers.

Step 5: Slide the heat shrink tubing over the 3/8-inch lug.

Step 6: Apply heat to the heat shrink tubing using a heat gun until it shrinks and forms a tight seal.

4. Installation

To ensure safe and efficient operation, always follow the installation instructions in sequence.

4.1. Wear Insulating Gloves

Wear insulating gloves for safety during installation.

4.2. Remove the Covers

Remove the Upper Cover using a screwdriver.

Remove the Lower Cover using a screwdriver.

[NOTE] Installing the Upper Cover is optional if terminals are not enclosed.

4.3. Connect the Shunt to the Main Battery Negative

STEP-1: Install the bare wire on the shunt B- terminal (torque: 173.5-224.8 in-lbs / 19.6-25.4 N•m).

STEP-2: Install the bare wire on the main battery negative terminal.

4.4. Connect the Shunt to the Device AUX BAT-

STEP-1: Install the bare wire on the shunt P- terminal (torque: 173.5-224.8 in-lbs / 19.6-25.4 N•m).

STEP-2: Install the bare wire on the device AUX BAT- terminal (e.g., on a DC-DC Battery Charger or Loads/Chargers/Inverters).

4.5. Connect the Shunt to the Main Battery Positive

STEP-1: Install the B+ wire on the shunt B1 terminal.

STEP-2: Install the B+ wire on the main battery positive terminal.

4.6. Install a Battery Temperature Sensor

Connect the Battery Temperature Sensor to the Battery Temperature Sensor Port (T1) on the shunt.

4.7. Connect the Shunt to the Starter Battery Positive (Optional)

STEP-1: Install the B+ wire on the shunt B2 terminal.

STEP-2: Install the B+ wire on the starter battery positive terminal.

4.8. Mount the Shunt (Optional)

Mount the shunt to a proper location for system safety.

4.9. Install the Covers

Install the Lower Cover.

Install the Upper Cover (Optional).

5. Configuration

5.1. Power On

Power on all system devices. The Battery Shunt powers up automatically, indicated by the Power LED Indicator lighting up.

5.2. Pairing with DC Home or Renogy ONE

For initial use, set the "Rated Battery Ah" in the app to match your battery's capacity.

Initial Pairing

Step 1: On DC Home or Renogy ONE, navigate to "Add Devices".

Step 2: Scan and pair the shunt with the Renogy ONE or DC Home app.

Pairing with Another Device

Step 1: Remove the shunt from the DC Home app or ONE, or press and hold RESET on the shunt for 5 seconds.

Step 2: After the Bluetooth LED turns off, redo scanning and pairing.

5.3. Energy Monitoring

The shunt can establish short-range or long-range communication with monitoring devices like RENOGY ONE Core and DC Home for real-time monitoring and system management.

Short-Range Monitoring via DC Home App

Download and log in to the DC Home app. Follow the on-screen steps for monitoring.

Wireless Long-Range Monitoring

Connect the shunt to RENOGY ONE Core via Bluetooth, and RENOGY ONE Core to the DC Home app via Wi-Fi for long-range communication.

5.4. SOC Synchronization

Required for reliable SOC readout, especially for aged batteries. Recalibrate SOC when battery capacity degrades.

Perform SOC synchronization during initial installation, after voltage supply interruptions, or when the battery is not fully charged.

DC Home app

Step 1: Tap the shunt details page, then tap "... > Settings".

Step 2: Under "Battery", tap Sync in "SOC sync".

Step 3: Choose "Sync to 100%", "Sync to 0%", or "Customization". Customization is recommended to match the actual SOC (0-100).

Step 4: Tap "Sync" to complete.

Renogy ONE

Step 1: Tap the shunt details page, then tap "..." in the upper-right corner.

Step 2: Under "Battery", tap Sync in "SOC sync".

Step 3: Choose "Sync to 100%", "Sync to 0%", or "Customization". Customization is recommended to match the actual SOC (0-100).

Step 4: Tap "Sync" to complete.

5.5. Essential Alarm Settings

Configure alarms via "... > Settings > Alarm" in the DC Home app or Renogy ONE Core.

[NOTE] Value ranges in the DC Home app or Renogy ONE Core prevail. Buzzer can be enabled/disabled for each alarm.

5.6. Historical Data

Access historical data via DC Home app or Renogy ONE Core.

Last Discharged Ah: Amount of electrical charge consumed/discharged in the last cycle (Discharge Current x Discharge Duration).

Last Charged Ah: Amount of electrical charge added/charged in the last cycle (Charge Current x Charge Duration).

[NOTE] Maintaining historical data is essential for diagnosing battery issues. Avoid clearing history unless replacing the battery.

5.7. Device Info

Navigate to "... > Settings > General" to change display name, access SN, delete shunt from Renogy ONE, or reset historical data.

6. LED Indicators

Power LED Indicator

Off: Power Off

Solid: Power On

Bluetooth LED Indicator

Off: No Bluetooth device connected

Solid: Bluetooth connected

7. Troubleshooting

8. FAQ

What types of battery does the shunt work with?

Battery Shunt 300 works with all types of batteries and battery banks between 8V and 120V, provided settings are calibrated correctly.

Can I monitor more than two batteries in parallel and series with one Battery Shunt 300?

Yes, you can monitor more than two batteries in parallel and series. Ensure total system voltage and maximum current draw are within specified limits and follow installation instructions.

What is the maximum operational current for the battery shunt?

Maximum continuous current is 300A, with a peak current of 500A. Prolonged operation above 300A can cause overheating, damage, and fire risk. Use within specified limits.

Why is the SOC or Time Remaining reading inaccurate?

Check wiring installation. If inaccurate, reset calibration: charge battery to 100%, then recalibrate capacity data via Renogy ONE or DC Home app (see "5.4 SOC Synchronization").

[NOTE] For more FAQ, visit www.renogy.com/support/faq.

9. Dimensions and Specifications

9.1. Dimensions

Dimensions: 5.27 x 3.82 x 1.22 in (134 x 97 x 31 mm).

Dimension tolerance: ±0.5 mm (0.2 in).

9.2. Technical Specifications

10. Maintenance

10.1. Inspection

Regularly check appearance, ensure clean and dry installation area, check cables for damage, connectors for firmness, indicators for normal state, and check for corrosion or damage marks.

[WARNING] Risk of electric shock! Ensure power is off before touching terminals.

[NOTE] Apply dielectric grease to connector contacts periodically to repel moisture and prevent corrosion.

10.2. Cleaning

Shut down the shunt. Disconnect power if cleaning inside. Wipe housing and contacts with a damp cloth or non-metallic brush. Use household cleaner if needed. Dry thoroughly.

10.3. Storage

Disconnect all connectors. Apply dielectric grease to contacts.

11. Emergency Responses

In case of threat, first contact emergency response team and notify affected people.

[CAUTION] Only perform suggested actions if safe.

11.1. Fire

1. Disconnect all cables.

2. Extinguish fire with water, CO2, or ABC extinguisher. [WARNING] Do not use type D (flammable metal) fire extinguishers.

11.2. Flooding

1. If submerged, stay away from water.

2. Disconnect all cables.

11.3. Smell

1. Disconnect all cables.

2. Ensure nothing is in contact with the shunt.

3. Ventilate the room.

11.4. Noise

1. Disconnect all cables.

2. Ensure no foreign objects are stuck in the connector.

Renogy Support

For inaccuracies or omissions, visit renogy.com/support/downloads or contact contentservice@renogy.com.

For solar system possibilities, visit Renogy Learning Center at renogy.com/learning-center.

For technical questions in the U.S., contact renogy.com/contact-us or call 1(909)2877111.

For technical support outside the U.S., visit local websites: Canada (ca.renogy.com), Australia (au.renogy.com), South Korea (kr.renogy.com), United Kingdom (uk.renogy.com), China (www.renogy.cn), Japan (jp.renogy.com), Germany (de.renogy.com), Other Europe (eu.renogy.com).

FCC & RSS

FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) no harmful interference, and (2) acceptance of received interference. Warning: Unauthorized modifications void user authority.

Equipment tested and found to comply with Class B digital device limits per Part 15 of FCC Rules. Designed for reasonable protection against harmful interference in residential installations. May cause interference to radio communications if not installed per instructions. If interference occurs, try: (1) Reorient/relocate antenna, (2) Increase separation, (3) Connect to a different circuit, (4) Consult dealer/technician.

FCC Radiation Exposure Statement

Complies with FCC radiation exposure limits for uncontrolled environments. Install and operate with minimum 20cm distance between radiator and body.

RSS Standard

Complies with Industry Canada license exempt RSS standard(s). Operation subject to two conditions: (1) no interference, and (2) acceptance of received interference. For RF exposure guidelines and compliance information, minimum body distance is 20cm.

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