Renogy Smart Shunt 300 User manual

USER MANUAL
VERSION A0
Smart Shunt 300
RENOGY
RSHST-B02P300-G1
B1
B2
T1

Before Getting Started
The user manual provides important operation and maintenance instructions for Renogy Smart Shunt
300 (hereinafter referred to as shunt).
Read the user manual carefully before operation and save it for future reference. Failure to observe the
instructions or precautions in the user manual can result in electrical shock, serious injury, or death, or
can damage the Renogy Smart Shunt, potentially rendering it inoperable.
zRenogy ensures the accuracy, sufficiency, and the applicability of information in the user manual
at the time of printing due to continual product improvements that may occur.
zRenogy assumes no responsibility or liability for personal and property losses, whether directly and
indirectly, caused by the user’s failure to install and use the product in compliance with the user
manual.
zRenogy is not responsible or liable for failures, damages, or injuries resulting from repair attempted
by unqualified personnel, improper installation and operation.
zThe illustrations in the user manual are for demonstration purposes only. Details may appear
slightly different depending on product revision and market region.
zRenogy reserves the right to change the information in the user manual without notice. For the
latest user manual, visit renogy.com.
Disclaimer
Renogy Smart Shunt 300 User Manual © 2023 Renogy. All rights reserved.
RENOGY and are registered trademarks of Renogy.
zAll information in the user manual is subject to copyright and other intellectual property rights of
Renogy and its licensors. The user manual may not be modified, reproduced, or copied, in whole or
in part, without the prior written permissions of Renogy and its licensors.
zThe registered trademarks in the user manual are the property of Renogy. The unauthorized use of
the trademarks is strictly prohibited.
Online Manual
Quick Guide User Manual
DC Home App
DC Home App

1. General Information ........................................................................................................................... 1
1.1. Symbols Used .............................................................................................................................................. 1
1.2. Introduction ................................................................................................................................................. 1
1.3. Key Features ................................................................................................................................................ 1
1.4. SKU................................................................................................................................................................. 1
2. Get to Know Renogy Smart Shunt 300.............................................................................................2
2.1. What’s In the Box? ..................................................................................................................................... 2
2.2. Required Tools & Accessories.................................................................................................................. 2
2.3. Product Overview....................................................................................................................................... 3
2.4. System Setup ............................................................................................................................................. 3
3. Preparation .........................................................................................................................................6
3.1. Plan a Mounting Site ................................................................................................................................. 6
3.2. Check Renogy Smart Shunt 300 ............................................................................................................ 6
3.3. Check System Voltage and Current........................................................................................................7
3.4. Size Bare Wires ............................................................................................................................................7
3.5. How to Install 3/8 in Lugs? .......................................................................................................................7
4. Installation ..........................................................................................................................................9
4.2. Remove the Covers.................................................................................................................................... 9
4.3. Connect the Shunt to the Main Battery Negative..............................................................................10
4.4. Connect the Shunt to the Device BAT- ................................................................................................10
4.5. Connect the Shunt to the Main Battery Positive................................................................................ 11
4.6. Install a Battery Temperature Sensor................................................................................................... 11
4.7. Connect the Shunt to the Starter Battery Positive (Optional) ........................................................12
4.8. Mount the Shunt (Optional) ....................................................................................................................12
4.9. Install the Covers ......................................................................................................................................13
5. Configuration.................................................................................................................................... 14
5.1. Power On.....................................................................................................................................................14
5.2. Pairing with DC Home or Renogy ONE..................................................................................................14
5.3. Energy Monitoring.....................................................................................................................................16
5.4 SOC Synchronization ...............................................................................................................................18
6. LED Indicators................................................................................................................................... 21
7. Troubleshooting................................................................................................................................22
8. FAQ......................................................................................................................................................23
9. Dimensions and Specifications.......................................................................................................24
9.1. Dimensions................................................................................................................................................ 24
9.2. Technical Specifications......................................................................................................................... 24
Table of Contents

Maintenance..............................................................................................................................................26
Inspection .............................................................................................................................................................26
Cleaning ................................................................................................................................................................26
Storage.................................................................................................................................................................. 26
Emergency Responses.............................................................................................................................27
Renogy Support ........................................................................................................................................28
FCC & RSS ..................................................................................................................................................29
FCC Statement .................................................................................................................................................... 29
FCC Radiation Exposure Statement................................................................................................................ 29
RSS Standard....................................................................................................................................................... 29

— 1 —
1. General Information
1.1. Symbols Used
The following symbols are used throughout the user manual to highlight important information.
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 Smart 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.
In addition, 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, Smart Shunt 300 communicates with the DC Home app and
Renogy ONE. This allows you to monitor real-time charging and discharging data and customize related
parameters. These settings encompass nominal capacity, deep discharge thresholds, temperature
alarms, and SOC alarms.
1.3. Key Features
zUniversal Battery Compatibility
Works seamlessly with various battery types, including Lead Acid (AGM, GEL), Lithium Iron Phosphate,
Lithium-ion, and Nickel-metal hybrid.
zComprehensive Battery Insights
Provides vital battery information such as State of Charge (SOC), voltage, current, energy, remaining
time, temperature, and starter battery voltage.
zAlarm and Historical Data
Records historical data and offers alerts for abnormal conditions through the DC Home app.
zConvenient Remote Monitoring
Enables remote monitoring and control via Renogy ONE and the DC Home App using Bluetooth
connectivity.
zEffortless Installation and Configuration
Simplifies installation and settings adjustments through the DC Home app for a user-friendly
experience.
1.4. SKU
Renogy Smart Shunt 300 RSHST-B02P300-G1

— 2 —
2. Get to Know Renogy Smart Shunt 300
2.1. What’s In the Box?
Renogy Smart Shunt 300 × 1
Quick Guide × 1
B1/B2 Wires (1 m) (22 AWG) × 2 Temperature Sensor (1.5 m) × 1
VERSION A0
Smart Shunt 300
RENOGY
RSHST-B02P300-G1
QUICK GUIDE
Mounting Screws x 3
(1 extra)
ST4 x 18 mm
3/8 in
(M10)
B1
B2
T1
B1
B2
T1
Make sure that all accessories are complete and free of any signs of damage.
The accessories and product manual listed are crucial for the installation, excluding warranty
information and any additional items. Please note that the package contents may vary
depending on the specific product model.
2.2. Required Tools & Accessories
Insulating Gloves
Bare Wires × 2
Wrench
(11/16 in)
17 mm
17 mm
17 mm
Phillips
Screwdriver (#1) Wire stripper
Slotted
Screwdriver (1 mm)
Manual Hydraulic
Pliers
3/8 in Lugs
(M10 Ring Terminals) × 2
Heat Gun Heat Shrink Tubing
Prior to installing and configuring the shunt, prepare the recommended tools, components, and
accessories.
For how to size bare wires, refer to “Size Bare Wires” in this manual.
For how to install 3/8 in Lugs (M10 Ring Terminals), see “How to Install 3/8 in Lugs?“ in this
manual.
For connection methods and required tools for the auxiliary battery, starter battery, and
equipment terminal, please refer to the user manual of the specific device. The diagrams
provided within this manual are for illustrative purposes only.

— 3 —
2.3. Product Overview
█Exterior
Upper Cover
Lower Cover
Mounting Hole Mounting Hole
Power LED Indicator
Bluetooth LED Indicator
RESET Button
B1
B2
T1
█Interior (with the covers removed)
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
Main Battery
Positive
+ -
Temperature
B-
B1
P- Negative
Loads / Chargers / Inverters
BAT-BAT+
DC-DC Battery Charger
-
+
T1

— 4 —
█Connecting to Both a Main Battery and a Starter Battery
Main Battery
Positive
+ - - +
Temperature
B-
B1
P- Negative
Starter Battery
Loads / Chargers / Inverters
BAT-BAT+
DC-DC Battery Charger
-
+
B2
T1
In such scenario, the shunt detects voltage of both the main battery and the starter battery.
█Connecting to Multiple Main Batteries
The illustrations depict two batteries in parallel as an example. There is no limit on the number of
batteries in parallel. You can customize the setup with more batteries as needed.
Please ensure the combined continuous current from the batteries must not surpass 300A, maintaining
a voltage below 120V.
Main batteries in parallel
Main Batteries
Positive
+ - - +
Temperature
B-
B1
P- Negative
Starter Battery (optional)
Loads / Chargers / Inverters
BAT-BAT+
DC-DC Battery Charger
-
+
+ -
-
+
B2
T1
You can connect the Smart Shunt 300 to a starter battery via the B2 port on demand.

— 5 —
The illustrations depict two batteries in series as an example. There is no limit on the number of
batteries in series. You can customize the setup with more batteries as needed.
Please ensure the continuous current from the batteries must not surpass 300A, maintaining a total
voltage below 120V.
Main batteries in series
Main Batteries
Positive
+ - - +
Temperature
B-
B1
P- Negative
Starter Battery (optional)
Loads / Chargers / Inverters
BAT-BAT+
DC-DC Battery Charger
-
+
+ -
-
+
B2
T1
You can connect the Smart Shunt 300 to a starter battery via the B2 port on demand.

— 6 —
3. Preparation
3.1. Plan a Mounting Site
Select a proper mounting site to ensure the shunt can be safely connected to the battery and other
necessary devices with the relevant cables. Install the shunt in a clean, cool, and dry location, free from
any accumulation of water, oil, or dirt. For optimal Bluetooth communication, avoid placing the smart
shunt near metal objects.
KEEP DRY FRAGILE VENTILATION
14°F to 122°F
-10°C to 50°C 0% to 95%
Enclosed space
Vent
Vent
Air
cross-flow
B1
B2
T1
Install the Renogy Smart Shunt 300 indoors and prevent its components from being exposed to
direct sunlight.
Do not expose Renogy Smart Shunt 300 to flammable or harsh chemicals or vapors.
Keep Renogy Smart Shunt 300 out of the reach of children.
Make sure that the Renogy Smart Shunt 300 is installed with ambient temperature range from
-4°F to 122°F or -20°C to 50°C.
Make sure that the Renogy Smart Shunt 300 is installed in an environment with relative humidity
between 0% and 95% and no condensation.
3.2. Check Renogy Smart Shunt 300
B1
B2
T1
Inspect the shunt for any visible damage including cracks, dents,
deformation, and other visible abnormalities. All connector contacts
shall be clean, dry, and free of dirt and corrosion.
Do not use Renogy Smart Shunt 300 if it appears to be damaged.
There are no serviceable parts in Renogy Smart Shunt 300. Do not open, dismantle, repair,
tamper with, or modify it.
Wear proper protective equipment and use insulated tools during installation.
Do not dispose of Renogy Smart Shunt 300 as household waste. Comply with local, state, and
federal laws and regulations and use recycling channels as required.