RENOGY Core LT Low Temperature Series Deep Cycle Lithium Iron Phosphate Battery User Manual

RENOGY Core LT Low Temperature Series Deep Cycle Lithium Iron Phosphate

Battery

Product Information

• Product Name: Renogy Core LT (Low Temperature) Series Deep Cycle Lithium Iron Phosphate Battery
• Model: RBT24100LFPSH
• Version: A0
• Voltage: 25.6V
• Capacity: 100Ah
• Designed for drop-in replacement of deep-cycle lead-acid batteries
• Standard Battery Council International (BCI) group size

Product Usage Instructions

1. Read the user manual carefully before operating the battery.
2. Ensure to follow all the instructions and precautions mentioned in the user manual to avoid electrical shock, serious injury, or damage to the battery.
3. Renogy assumes no responsibility or liability for any personal or property losses resulting from failure to install and use the product in compliance with the user manual.
4. Do not attempt to repair the battery unless you are a qualified personnel. Improper repair attempts can result in failure, damage, or injury.
5. The illustrations in the user manual are for demonstration purposes only and may vary slightly based on product revision and market region.
6. Visit renogy.com for the latest version of the user manual.

Important Safety Instructions

• Refer to page 18 of the user manual for detailed safety instructions.

Renogy Support

• For any assistance or support, contact Renogy.

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.

Before Getting Started

The user manual provides important operation and maintenance instructions for Renogy Core LT (Low Temperature) Series 25.6V 100Ah Deep Cycle Lithium Iron Phosphate Battery (hereinafter referred to as battery).

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 battery, potentially rendering it inoperable.

• Renogy 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.
• Renogy 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.
• Renogy is not responsible or liable for any failure, damage, or injury resulting from repair attempts by unqualified personnel, improper installation, or inappropriate operation.
• The illustrations in the user manual are for demonstration purposes only. Details may appear slightly different depending on product revision and market region.
• Renogy reserves the right to change the information in the user manual without notice. For the latest user manual, visit renogy.com.

Disclaimer

• Renogy Core LT (Low Temperature) Series 25.6V 100Ah Deep Cycle Lithium Iron Phosphate Battery User Manual © 2023 Renogy. All rights reserved.
• RENOGY and RENOGY are registered trademarks of Renogy.
• All 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.
• The registered trademarks in the user manual are the property of Renogy. The unauthorized use of the trademarks is strictly prohibited.

Online Manual

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 LT (Low Temperature) Series 25.6V 100Ah Deep Cycle Lithium Iron Phosphate Battery is designed for the drop-in replacement of deep-cycle lead-acid batteries with its standard Battery Council International (BCI) group size. Weighing only half of the lead-acid counterparts, the battery can be safely discharged to 100% Depth of Discharge (DOD), delivering twice the energy. Manufactured with automotive grade battery cells, the battery features the highest safety standards and an extended 5000+ cycle life. In addition, the reliable Battery Management System (BMS) provides comprehensive protection to the battery.

Key Features

• Unparalleled Performance
  Features a greater energy density, a deeper discharge capability, a higher round-trip efficiency, and a faster charging speed in a smaller size over counterparts in the market.

• Uncompromising Quality
  Ensures an exceptional lifespan with more than 5000 cycles (80% DOD), a continuous charge current of 100A and a continuous discharge current of 100A, and a wide range of operating temperatures with the automotive grade battery cells.

• Reliable Protection Mechanisms
  Designed with a sturdy internal structure for RV use, and includes multiple levels of protection such as low temperature cut-off and precise balancing through the smart battery management system.

• Intelligent high power self-heating Function
  Equipped with a 200W self-heating function to ensure battery charging at low temperature.

• Easy to Expand
  Upgrades to lithium batteries seamlessly with the standard BCI group sizes; up to 16 batteries in 2 series and 8 parallels system connection delivering a maximum of 48V (51.2V) 800Ah with 40.96 kWh.

SKU

• Renogy Core LT (Low Temperature) Series 25.6V 100Ah Deep Cycle Lithium Iron Phosphate Battery RBT24100LFPSH

What’s In the Box

Renogy Core LT (Low Temperature) Series 25.6V 100Ah Deep Cycle Lithium Iron Phosphate Battery × 1

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

Required Tools & Accessories

• 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

Dimensions

• 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 load. Refer to the table below for copper cable ampacities with different gauge sizes.

The above values are from the NEC Table 310.17 for copper cables rated at 194°F (90°C), operating at an ambient temperature of no more than 86°F (30°C). Cables longer than 13 feet (4000 mm) may require thicker gauge wires to prevent excessive voltage drop in undersized wiring.

Fix the Battery to a Position (Optional)
Securing the battery prevents damage to the battery from loose cables and bumps.

Recommended Components

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

Installation

Step 1. Plan a Mounting Site
For optimal battery performance, it is recommended to install the battery in a clean, cool, and dry location, free from any accumulation of water, oil, or dirt. Accumulation of such materials on the battery can lead to current leakage, self-discharge, and even short-circuiting.

• Sufficient air flow must be provided to prevent excessive heat build-up and to minimize temperature variation between the connected batteries.
• This user manual takes a battery as an example to illustrate how to install the battery.

Step 2. Wear Insulating Gloves

Step 3. Remove the Dust Cover.

Step 4. Check the Battery
Inspect the battery for any visible damage including cracks, dents, deformation, and other visible abnormalities. All connector contacts shall be clean, free of dirt and corrosion, and dry.

• Do not touch the exposed electrolyte or powder if the battery is damaged.
• If uncovered electrolyte or powder contacts your skin or eyes, flush it out immediately with plenty of clean water and seek medical attention.

Step 5. Run the Adapter Cables Through the Insulating Sleeves

Step 6. Install Battery Terminals

• 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 the washers between the battery terminal and the cable lug to avoid high resistance and excessive heating.
• Avoid short-circuiting the battery terminals to prevent irreversible damage to the system and battery caused by current bursts.
• Verify polarity before wiring to avoid irreversible battery damage due to polarity reversal.
• To ensure safe and reliable operation of the system, please follow the manufacturer’s recommended torque specifications when securing cable connections. Over-tightening can result in terminal breakage, while loose connections can lead to terminal meltdown or fire. When securing multiple cable lugs on a single battery terminal, use the included Long Terminal Bolts.

Step 7. Install the Insulating Sleeves

Step 8. Connect the Battery to Other 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 a Single Battery
• For Batteries in Parallel
• For Batteries in Series

How to Connect Renogy Core Batteries in Series or Parallel

Calculate Voltage and Current in Series and Parallel Connections

• 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 the 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, which can affect their ability to deliver reliable power and may lead to safety hazards.
• The cables between each connected battery should be of equal length to ensure that all batteries can work equally together.
• You can connect up to 8 batteries in parallel or 2 batteries in series.

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:

• Step 1: Charge each battery individually to its full capacity using a suitable charger.
• 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.
• Step 3: Connect all the batteries in parallel and allow them to rest together for 12 to 24 hours.

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 in series and parallel connections. Busbars help handle high currents and are typically arranged in a parallel or stacked configuration to distribute electrical power efficiently.
• Note that the cable connection methods provided below are for reference purposes only, as the optimal approach may vary depending on the specific situation. It is essential to consider various factors, such as the cable size, equipment used, and environmental conditions.

Parallel Connection

Series Connection

Parallel & Series Connection

Battery Cell Balancing
The battery employs bypass circuit to maintain the balance between each battery cell group. Each battery cell group is connected with a bypass resistor and a switch in parallel. During the charging process, if the highest-voltage battery cell group reaches the set balancing starting voltage and the voltage difference between the highest-voltage and the lowest-voltage battery cell group exceeds the set voltage difference, the switch connected to the highest-voltage battery cell group will be closed to shunt the charge current around the highest-voltage battery cell group through the bypass resistor until the voltage difference drops below the set value. To avoid excessive energy loss, the battery cell balancing is only performed during the charging process.

Charging/Discharging Parameter Settings

Charge

Discharge

The parameters in the table are applicable to 24V (25.6V) battery packs. Please multiply by 2 for 48V (51.2V) packs.

Battery Charging and Discharging Logic

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

Charging Logic
The standard charging process for the battery involves charging at a constant current of 50A until the battery voltage reaches 29.0V, followed by charging at a constant voltage of 29.0V while tapering the charge current. The charging process is considered complete when the charge current is less than 5A (also known as tail current). The standard charging process typically takes 2.5 hours and requires battery temperatures to be between 32°F and 131°F (0°C and 55°C) for safe charging. Leaving the battery on float will continue to balance the battery cells without damaging the battery.

• Lithium batteries are compatible with various charging methods, including MPPT charge controller, AC charger, and DC-DC charger. The crucial parameter setting for these chargers is to set the charge voltage, boost voltage, or bulk voltage at 29.0V (±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 battery charger or charge controller that is compatible with lithium iron phosphate batteries.
• Do not exceed the maximum continuous charge current (100A) of the battery.

Discharging Logic
During standard discharging, the battery is discharged at a constant current of 100A until the voltage drops to 20V. To ensure safe discharging, the battery temperature should be between -4°F (-20°C) and 131°F (60°C).

• To ensure safe and optimal battery usage, it is recommended to pair the battery with discharge equipment that features 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 (100A) of the battery.

How to Estimate the Battery SOC

The SOC values listed below are estimated based on the resting voltage when the battery is at rest for 30 minutes, not in charging or discharging state.

The table above is for reference only because 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 the parallel battery bank. The self-heating function will start at optimal performance once the battery temperature drops below 41°F (5°C) and stop operating automatically once the battery temperature rises above 50°F (10°C). The temperature rise rate is approximately 86°F (30°C) per hour when running at full power of 200W.

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.

Troubleshooting

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

Specifications

General

• Battery Cell Type Lithium Iron Phosphate / Prismatic Cell
• Rated Capacity (0.5C, 25°C) 100Ah
• Nominal Voltage 25.6V
• Voltage Range 20.0V to 29.2V
• Cycle Life (0.5C, 25°C) 5000 Cycles (80% DOD)
• Dimension 20.55 x 9.45 x 8.62 in / 522 x 240 x 219 mm
• Weight 46.3 lbs. / 21.0 kg
• Connection Method Series & Parallel (2S8P)
• Terminal Bolt Size M8 x 1.25 x 15 mm
• Recommended Terminal Torque 88.5 inch·lbs to 106.2 inch·lbs / 10 N·m to 12 N·m
• Protection Rating IP65
• Certification MSDS, UN38.3, FCC, CE, PSE, and UKCA

Operation Parameters

• Charge Voltage 29.0V
• Maximum Continuous Charge Current 100A
• Maximum Continuous Discharge Current 100A
• Peak Discharge Current 300A@5s
• Charge Temperature Range -4°F to 131°F (-20°C to 55°C)
• Discharge Temperature Range -4°F to 140°F (-20°C to 60°C)
• Storage Temperature Range -13°F to 149°F (-25°C to 65°C)
• Operation Relative Humidity 10% to 95%

Maintenance & Storage

Inspection
Please perform regular inspections following the steps below:

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

In certain application scenarios, corrosion may occur around the terminals. Corrosion can cause increased resistance and poor contact. It is recommended to regularly apply insulation grease to each terminal. Insulation grease can form a moisture-resistant seal and protect the terminals from corrosion.

Cleaning
Please clean the battery at regular intervals following the steps below:

• Disconnect the battery from the system.
• Clear the leaves and debris from the battery.
• Clean the battery with a soft, lint-free cloth. The cloth can be dampened with water or mild soap and water if the battery is extremely dirty.
• Dry the battery with a soft, lint-free cloth.
• Keep the area around the battery clean.
• Reconnect the battery to the system.

Checking Voltage
Please check the battery voltage periodically to assess battery health. If the battery is unable to be activated with a charge/discharge current greater than 1A or the battery is activated with a resting voltage below 20V, the battery may have been severely overdischarged due to self-discharge or parasitic loads. Please stop using the battery until the fault can be corrected and the battery can be charged.

Storage
Please follow the tips below to ensure that the battery emerges from storage in a 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 it from overdischarge.
• Fully charge the battery when it is taken out of storage.

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

• 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 because excessively long cables result in a 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 quick guide or user manual, visit or contact us at:

• renogy.com/support/downloads
• [email protected].

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

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

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

• Canada ca.renogy.com
• Australia au.renogy.com
• South Korea kr.renogy.com
• United Kingdom uk.renogy.com
• China www.renogy.cn
• Japan renogy.jp
• Germany de.renogy.com
• Other Europe eu.renogy.com.

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.
• We intend to be a driving force for sustainable living and energy independence.
• In support of this effort, our range of solar products makes it possible for you to minimize your carbon footprint by reducing the need for grid power.

Live Sustainably with Renogy
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
• Save 105 gallons of water from being consumed

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• Youtube: @Renogy Solar
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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.

EC/REP

• eVatmaster Consulting GmbH
• Battinastr. 30 60325 Frankfurt am Main, Germany
• [email protected].
• Manufacturer: RENOGY New Energy Co.,Ltd
• Address: No.66, East Ningbo Road Room 624-625 Taicang German Overseas Students Pioneer Park JiangSu 215000 CN.

UK/REP

• EVATOST CONSULTING LTD
• Suite 11, First Floor, Moy Road Business Centre, Taffs Well, Cardiff, Wales, CF15 7QR
• [email protected].

RENOGY.COM.

References

• Solar Power Kits & Equipment for Sale | Renogy Australia
• Renogy® Canada solar off-grid items, Canadian solar panels
• Renogy bietet alle Produkte für netzunabhängige Solarsysteme anRenogy DE
• Renogy Solar Korea
• Renogy® Official- offer all off grid solar system products
• Contact Us | Renogy Solar Panels & Complete Solar Kits
• Downloads
• Top off-grid solar kits, lithium batteries supplies | Renogy UK
• RENOGY如果新能源 | 让每个人拥有独立清洁的能源
• Renogy® Official- offer all off grid solar system products
• Contact Us | Renogy Solar Panels & Complete Solar Kits
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