RENOGY Core Series Deep Cycle Lithium Iron Phosphate Battery 12.8V 300Ah RBT12300LFPSH

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.

Introduction

The RENOGY Core Series 12.8V 300Ah Deep Cycle Lithium Iron Phosphate Battery is designed as a drop-in replacement for deep-cycle lead-acid batteries, fitting standard Battery Council International (BCI) group sizes. Weighing half as much as lead-acid counterparts, it can be safely discharged to 100% Depth of Discharge (DOD), delivering twice the energy. Manufactured with automotive-grade battery cells, it offers the highest safety standards and an extended 5000+ cycle life. The integrated Battery Management System (BMS) provides comprehensive protection.

Key Features

• Unparalleled Performance: Greater energy density, deeper discharge capability, higher round-trip efficiency, and faster charging speed in a smaller size.
• Uncompromising Quality: Exceptional lifespan with over 5000 cycles (80% DOD), continuous charge/discharge current of 200A, and a wide operating temperature range thanks to automotive-grade battery cells.
• Reliable Protection Mechanisms: Sturdy internal structure for RV use, with multiple protection levels including low-temperature cut-off and precise balancing via the smart BMS.
• Intelligent High Power Self-heating Function: Equipped with a 90W self-heating function to ensure battery charging at low temperatures.
• Easy to Expand: Seamless upgrades to lithium batteries with standard BCI group sizes. Supports up to 16 batteries in a 4 series and 4 parallel configuration, delivering a maximum of 48V (51.2V) and 1200Ah (61.44 kWh).

SKU

RENOGY Core Series 12.8V 300Ah Deep Cycle Lithium Iron Phosphate Battery

RBT12300LFPSH

What's In the Box?

• RENOGY Core Series 12.8V 300Ah Deep Cycle Lithium Iron Phosphate Battery × 1
• User Manual × 1
• M8*1.25*20 mm Long Terminal Bolt × 2
• Insulating Sleeve × 2

Ensure that all accessories are complete and free of any signs of damage.

Required Tools & Accessories

• 13 mm Wrench (17/32 in)
• 5/16 in (M8) Battery Adapter Cables × 2
• Insulating Gloves
• Multimeter

Prior to installing and configuring the battery, prepare the recommended tools, components, and accessories. For how to size battery adapter cables, refer to "How to Size Battery Adapter Cables?" in this manual.

Get to Know Deep Cycle Lithium Iron Phosphate Battery

Terminals: Positive Terminal (M8), Negative Terminal (M8)

Lift Handles: Located on the sides for easier carrying.

Dimensions

Length: 20.55 in (522 mm)

Width: 9.45 in (240 mm)

Height: 8.62 in (219 mm)

Weight: 60.63 lbs (27.5 kg)

Dimension tolerance: ±0.2 in (0.5 mm)

How to Size Battery Adapter Cables?

Use appropriately sized Battery Adapter Cables (sold separately) based on expected loads. Refer to the table below for copper cable ampacities with different gauge sizes for up to 13 feet (4 m) cables. Cables longer than 13 feet (4 m) may require thicker gauge wires to prevent excessive voltage drop in undersized wiring.

The above values are from the NEC Table 310.16 for copper cables rated at 194°F (90°C), operating at an ambient temperature of no more than 86°F (30°C). Please note that wire gauge standards may vary due to factors such as temperature and installation conditions. In actual applications, it is recommended to refer to the latest NEC standards.

Fix the Battery to a Position (Optional)

Securing the battery prevents damage from loose cables and bumps. You can purchase the following accessories and components on demand:

• Recommended Components: Battery Tray, Tie Down Strap, Mounting Screws × 4

Alternative mounting methods are allowed to meet the requirements of specific applications.

Step 1. Plan a Mounting Site

For optimal battery performance, install the battery in a clean, cool, and dry location, free from any accumulation of water, oil, or dirt. Accumulation of such materials can lead to current leakage, self-discharge, and short-circuiting.

Ventilation: Sufficient air flow must be provided to prevent excessive heat build-up and to minimize temperature variation between connected batteries. Maintain a distance of 1.97-3.94 inches (5-10 cm) around the battery for air cross-flow.

Operating Temperature Ranges:

• Charge: -4°F to 131°F / -20°C to 55°C (Battery < 32°F/0°C: self-heating function is active)
• Discharge: -4°F to 140°F / -20°C to 60°C

Operating Humidity: 10% to 95%

Environment: KEEP DRY, VENTILATION REQUIRED. Avoid enclosed spaces without adequate airflow.

This user manual takes a single battery as an example; similar rules apply to scenarios involving multiple batteries.

Step 2. Wear Insulating Gloves

Wear insulating gloves to protect yourself during handling.

Step 3. Remove the Dust Cover.

Remove the protective dust cover from the battery terminals.

Step 4. Check the Battery

Inspect the battery for any visible damage, including cracks, dents, deformation, and other abnormalities. Ensure all connector contacts are clean, dry, and free of corrosion.

Safety Precaution: Do not touch exposed electrolytes or powder if the battery is damaged. If any uncovered electrolyte or powder comes into contact with skin or eyes, flush the area immediately with plenty of clean water and seek medical attention.

Step 5. Run the Adapter Cables Through the Insulating Sleeves

Thread the battery adapter cables through the provided insulating sleeves before connecting them to the terminals.

Step 6. Install Battery Terminals

Connect the battery adapter cables to the battery terminals using the provided Long Terminal Bolts, Spring Washer, and Flat Washer. Ensure the cable lug and the top surface of the terminal are in contact, and place the washers on top of the lug. Do not place a washer between the battery terminal and the cable lug to avoid high resistance and excessive heating.

Torque Specification: 88.5 to 106.2 inch×lbs (10 to 12 N×m)

Important:

• Verify polarity before wiring to avoid irreversible battery damage due to polarity reversal.
• Avoid short-circuiting the battery terminals to prevent irreversible damage to the system and battery caused by current bursts.
• When securing multiple cable lugs on a single battery terminal, use the included Long Terminal Bolts.
• Follow manufacturer's recommended torque specifications; over-tightening can break terminals, while loose connections can cause meltdown or fire.

Step 7. Install the Insulating Sleeves

Install the insulating sleeves over the connected terminals for protection.

Step 8. Connect the Battery to Power Supply Devices

Please use circuit breakers, fuses, or disconnects appropriately sized by a certified electrician, licensed installers, or regional code authorities to protect all electrical equipment. For details about series and parallel battery connections, refer to "How to Connect Batteries in Series or Parallel" in this manual.

For a Single Battery: Connect the battery via a fuse to the DC Distribution Panel, Charge Controller, Inverter, or DC-DC Charger.

For Batteries in Parallel: Connect batteries in parallel (positive to positive, negative to negative) via individual fuses to the DC Distribution Panel, Charge Controller, Inverter, or DC-DC Charger.

For Batteries in Series: Connect batteries in series (positive to negative) via a fuse to the DC Distribution Panel, Charge Controller, Inverter, or DC-DC Charger.

How to Connect Batteries in Series or Parallel

Calculate Battery Voltage and Current in Series and Parallel Connections

The cables between each connected battery should be of equal length to ensure all batteries work equally together. You can connect up to 8 batteries in parallel or 4 batteries in series.

Important:

• Do not connect batteries with different chemistries, rated capacities, nominal voltages, brands, or models in parallel or in series. This can result in potential damage to the batteries and connected devices, and can also pose safety risks.
• Avoid connecting batteries that have been purchased for more than half a year. Over time, batteries can degrade and their performance may decrease, affecting their ability to deliver reliable power and potentially leading to safety hazards.

Parallel Connection: Connect positive terminals together and negative terminals together. For four 12.8V 300Ah batteries in parallel, the system voltage is 12.8V and the system current is the sum of individual battery currents (e.g., 300A + 300A + 300A + 300A = 1200A).

Series Connection: Connect the positive terminal of one battery to the negative terminal of the next. For four 12.8V 300Ah batteries in series, the system voltage is the sum of individual battery voltages (e.g., 12.8V + 12.8V + 12.8V + 12.8V = 51.2V) and the system current is 300A.

Balance Batteries Prior to Connection

Before connecting batteries in series or parallel, it is important to balance them to reduce voltage differences and optimize their performance. Follow these three steps:

1. Step 1: Charge each battery individually to its full capacity using a suitable charger.
2. Step 2: Use a voltmeter to measure the voltage of each battery. It is best to keep the voltage difference of each battery less than 0.1V.
3. Step 3: Connect all the batteries in parallel and allow them to rest together for 12 to 24 hours before use.

It is recommended to periodically rebalance the battery voltages every six months when connecting multiple batteries as a battery system. Slight voltage differences can occur among batteries over time due to factors like battery chemistry, capacity, temperature, and usage patterns.

Series Connection vs. Parallel Connection -- Installation Steps

You can choose suitable busbars for series and parallel connections. Busbars help handle high currents and are typically arranged in a parallel or stacked configuration to distribute electrical power efficiently. The cable connection methods provided are for reference only; the optimal approach may vary depending on specific situations, including cable size, equipment used, and environmental conditions.

Parallel Connection

Configurations shown for 2 batteries in parallel (2P) and up to 8 batteries in parallel (8P).

• 2P: 12V (12.8V) 600Ah, 7680Wh
• 8P (Max): 12V (12.8V) 2400Ah, 30720Wh

Series Connection

Configurations shown for 2 batteries in series (2S) and up to 4 batteries in series (4S).

• 2S: 24V (25.6V) 300Ah, 7680Wh
• 4S (Max): 48V (51.2V) 300Ah, 15360Wh

Parallel & Series Connection

• 2P2S: 24V (25.6V) 600Ah, 15360Wh
• 2P4S: 48V (51.2V) 600Ah, 30720Wh
• 4P2S: 24V (25.6V) 1200Ah, 30720Wh
• 4P4S (Max): 48V (51.2V) 1200Ah, 61440Wh

Battery Cell Balancing

The battery employs a bypass circuit to maintain balance between each battery cell group. Each cell group is connected with a bypass resistor and a switch in parallel. During charging, if the highest-voltage cell group reaches the set balancing voltage and the voltage difference between the highest and lowest voltage cell groups exceeds the set value, the switch for the highest-voltage group closes, shunting charge current around it through the bypass resistor until the voltage difference drops. To avoid excessive energy loss, cell balancing is only performed during charging.

Charging/Discharging Parameter Settings

It is recommended that a single 12.8V 300Ah battery be charged at 150A, with a maximum allowable charging current of 200A. For single-battery scenarios, 12V charge controllers rated at least 150A are recommended; a 12V 200A charge controller or battery charger is ideal. For multiple batteries in series or parallel, consider the total voltage and capacity.

Charge (for Charge Controllers & Battery Chargers)

Discharge (for Inverters)

The parameters in the table are applicable to 12V (12.8V) battery packs. For 24V (25.6V) packs, multiply values by 2; for 48V (51.2V) packs, multiply by 4.

Battery Charging and Discharging Logic

The battery may be received at a partial state of charge (SOC). It is crucial to fully charge the battery before initial use. If the battery shuts off due to low SOC, promptly disconnect it from loads and charge it to prevent irreversible damage. Follow instructions in this manual for proper charging and usage to ensure optimal performance and longevity.

Charging Logic

The standard charging process involves charging at a constant current of 150A until the battery voltage reaches 14.4V, followed by charging at a constant voltage of 14.4V while tapering the charge current. Charging is complete when the charge current is less than 15A (tail current). The standard charging process typically takes 2.5 hours and requires battery temperatures between 32°F and 131°F (0°C and 55°C). Leaving the battery on float will continue to balance cells without damage.

Graph Description: A graph shows the charging process with a Constant Current (CC) phase at 150A until voltage reaches 14.4V, followed by a Constant Voltage (CV) phase at 14.4V where the current tapers down to 15A.

Lithium batteries are compatible with MPPT charge controllers, AC chargers, and DC-DC chargers. The crucial parameter setting for these chargers is to set the charge voltage, boost voltage, or bulk voltage at 14.4V (±0.2V). Do not overcharge or overdischarge the battery.

Do not discharge the battery at high temperatures above 140°F (60°C).

Only charge the battery with a compatible lithium iron phosphate battery charger or charge controller. Do not exceed the maximum continuous charge current (200A).

Discharging Logic

During standard discharging, the battery is discharged at a constant current of 200A until the voltage drops to 10V. For safe discharging, the battery temperature should be between -4°F (-20°C) and 131°F (60°C).

To ensure safe and optimal battery usage, pair the battery with discharge equipment featuring a low voltage disconnect (LVD) function. Do not connect large loads to the battery when it is running low.

Do not exceed the maximum continuous discharge current (200A) of the battery.

How to Estimate the Battery SOC?

The SOC values listed below are estimated based on the resting voltage (open-circuit voltage at rest) when the battery has been at rest for 30 minutes, not in charging or discharging state.

The table above is for reference only, as slight variations in battery voltage may occur among different batteries.

Self-heating Function

The normal operation of the self-heating function requires a stable charge current greater than 10A for each battery in a parallel bank. The self-heating function activates at optimal performance once the battery temperature drops below 32°F (0°C) and stops automatically when the temperature rises above 59°F (15°C). The temperature rise rate is approximately 41°F (5°C) per hour when running at full power (90W).

Battery Management System

The battery is equipped with a Battery Management System (BMS) that provides warnings and protections against overvoltage, undervoltage, overcurrent, short circuit, high temperature, and low temperature conditions. Refer to the table below for the triggering and recovery conditions of each warning and protection.

Monitoring

To monitor common battery parameters such as state of charge (SOC), battery voltage, charge current, and battery temperature, as well as historical data like total battery cycles, charged/consumed power, and maximum/minimum battery voltage, you need to add a Battery Shunt 300 (sold separately) and a battery temperature sensor to the system. Then, pair the battery shunt with the DC Home app (free) or Renogy ONE Core (sold separately) via Bluetooth. All required battery monitors and accessories are available at renogy.com.

System Setup:

• Connect the battery's positive terminal to the "B+" terminal of the Battery Shunt 300.
• Connect the battery's negative terminal to the "B-" terminal of the Battery Shunt 300.
• Connect the load/charger/inverter positive terminal to the "P+" terminal of the Battery Shunt 300.
• Connect the load/charger/inverter negative terminal to the "P-" terminal of the Battery Shunt 300.
• Connect the temperature sensor to the "T1" terminal of the Battery Shunt 300.
• The "AUX BAT+" and "AUX BAT-" terminals are for connecting to the positive and negative terminals of an auxiliary battery, respectively, through a specific device.

The illustration shows a solar system with a single auxiliary battery. For configurations involving both an auxiliary battery and a starter battery, refer to the Renogy Battery Shunt 300 User Manual.

Monitoring Instructions

1. Step 1: Add a Battery Shunt 300 to your solar system. Refer to the Renogy Battery Shunt 300 User Manual for details.
2. Step 2: Download and log in to the latest DC Home app. Alternatively, you can choose Renogy ONE Core as the sole monitor and skip to Step 3.
3. Step 3: Follow the pairing instructions to pair the battery shunt with the DC Home app or Renogy ONE Core. This typically involves enabling Bluetooth on your device, searching for the shunt, and completing the connection.
4. Step 4: Tap the device widget to monitor the battery parameters in the DC Home app or Renogy ONE Core.

Note: The version of the DC Home app and Renogy ONE Core may be updated. Illustrations are for reference only; follow instructions based on the current app version.

Troubleshooting

For further assistance, contact Renogy technical support service at https://www.renogy.com/contact-us.

Specifications

General

Operation Parameters

Maintenance & Storage

Inspection

• Examine the external appearance of the battery. The housing and terminals shall be clean, dry, and free of corrosion.
• Check battery cables and connections. Replace any damaged cables and tighten any loose connections.

In certain applications, corrosion may occur around terminals, increasing resistance and causing poor contact. It is recommended to regularly apply insulation grease to each terminal to form a moisture-resistant seal and protect against corrosion.

Cleaning

1. Disconnect the battery from the system.
2. Clear leaves and debris from the battery.
3. Clean the battery with a soft, lint-free cloth. Dampen the cloth with water or mild soap and water if the battery is extremely dirty.
4. Dry the battery with a soft, lint-free cloth.
5. Keep the area around the battery clean.
6. Reconnect the battery to the system.

Checking Voltage

Periodically check the battery voltage to assess its health. If the battery cannot be activated with a charge/discharge current greater than 1A or if it activates at a resting voltage below 10V, it may have been severely overdischarged. Stop using the battery until the fault is corrected and the battery can be charged.

Storage

Follow these steps to ensure the battery emerges from storage in good condition:

• Charge the battery to 30% to 50% SOC.
• Disconnect the battery from the system.
• Store the battery in a well-ventilated, dry, clean area with temperatures between -13°F (-25°C) and 149°F (65°C).
• Do not expose the battery to direct sunlight, moisture, or precipitation.
• Handle the battery carefully to avoid sharp impacts or extreme pressure on the battery housing.
• Charge the battery at least once every 3 to 6 months to prevent overdischarge.
• Fully charge the battery when it is taken out of storage.

Failure to follow these storage steps may void the warranty.

Important Safety Instructions

The manufacturer accepts no liability for any damage caused by:

• Force majeure including fire, typhoon, flood, earthquake, war, and terrorism.
• Intentional or accidental misuse, abuse, neglect, or improper maintenance, and use under abnormal conditions.
• Improper installation, improper operation, and malfunction of a peripheral device.
• Contamination with hazardous substances or radiation.
• Alterations to the product without express written consent from the manufacturer.

General Safety

• Wear proper protective equipment and use insulated tools during installation and operation. Do not wear jewelry or other metal objects when working on or around the battery.
• Keep the battery out of the reach of children.
• Do not dispose of the battery as household waste. Comply with local, state, and federal laws and regulations and use recycling channels as required.
• In case of fire, put out the fire with a FM-200 or CO2 fire extinguisher.
• Do not expose the battery to flammable or harsh chemicals or vapors.
• Clean the battery regularly.
• It is recommended that all cables should not exceed 10 meters, as excessively long cables result in voltage drop.
• The cable specifications listed in the quick guide account for critical, less than 3% voltage drop and may not account for all configurations.
• Do not expose the battery to strong electrostatic fields, strong magnetic fields, or radiation.

Battery Safety

• Please keep the battery away from water, heat sources, sparks, and hazardous chemicals.
• Do not puncture, drop, crush, burn, penetrate, shake, strike, or step on the battery.
• Do not open, dismantle, repair, tamper with, or modify the battery.
• Do not touch any terminals or connectors.
• Please make sure any battery charger or charge controller has been disconnected before working on the battery.
• Do not connect or disconnect terminals from the battery without first disconnecting loads.
• Do not place tools on top of the battery.
• Please use suitable handling equipment for safe transportation of the battery.
• Do not insert foreign objects into the positive and negative terminals of the battery.

Renogy Support

To discuss inaccuracies or omissions in this user manual, visit or contact Renogy:

• Support & Downloads: renogy.com/support/downloads
• Email: contentservice@renogy.com

To explore more possibilities of solar systems, visit Renogy Learning Center at: renogy.com/learning-center

For technical questions about your product in the U.S., contact the Renogy technical support team through:

• Website: renogy.com/contact-us
• Phone: 1(909)2877111

For technical support outside the U.S., visit the local website:

• Canada: ca.renogy.com
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• Australia: au.renogy.com
• Japan: jp.renogy.com
• Other Europe: eu.renogy.com
• Germany: de.renogy.com
• United Kingdom: uk.renogy.com

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FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: (1) Reorient or relocate the receiving antenna. (2) Increase the separation between the equipment and receiver. (3) Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. (4) Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure Statement

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

Renogy Empowered

Renogy aims to empower people around the world through education and distribution of DIY-friendly renewable energy solutions. Renogy intends to be a driving force for sustainable living and energy independence. In support of this effort, their range of solar products makes it possible to minimize your carbon footprint by reducing the need for grid power.

Did you know? In a given month, a 1 kW solar energy system will save 170 pounds of coal from being burned, save 300 pounds of CO2 from being released into the atmosphere, and save 105 gallons of water from being consumed.

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Social Media: @Renogy Solar, @renogyofficial, @Renogy

Renogy reserves the right to change the contents of this manual without notice.

Manufacturer: RENOGY New Energy Co.,Ltd

Address: No.66, East Ningbo Road Room 624-625 Taicang German Overseas Students Pioneer Park JiangSu 215000 CN

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Website: RENOGY.COM