Dr. Prepare 12V 100Ah Lithium Iron Phosphate (LiFePO4) Battery

Product Overview

A Dr. Prepare 12V 100Ah LiFePO4 battery, presented in a rectangular casing with clear labeling including 'Dr. Prepare', 'POWER MAX 548', 'LiFePO4 100Ah', and 'LITHIUM IRON PHOSPHATE DEEP CYCLE BATTERY'. This document provides essential information for safe and effective use.

Important Safety Instructions

• Please read through all the labels on the battery and this user guide before the first use.
• When connecting batteries in series or in parallel, read all the precautions about How to Connect Battery first, or you may damage the batteries.
• Keep the battery away from rain, splashes, and any wet locations.
• DO NOT short circuit the battery.
• DO NOT reverse polarity connection.
• DO NOT expose the battery to fire, extreme heat conditions, or close to any heat sources.
• DO NOT dismantle or modify the battery yourself.
• DO NOT drop the battery from a high altitude.
• DO NOT strike fiercely or penetrate the battery.
• Secure the battery in place to avoid any violent shaking when installing it in your vehicle.
• Please use a certified compatible LFP battery charger to charge the battery. The recommended optimal charging current is around 20 amps, while the maximum is 50 amps. Over-amped charging current will shorten the battery's lifespan.

Specifications

General

Dimension and Weight

Controller Setting (for reference)

• System voltage: 12V (x N)*
• Boost charge voltage: 14.2V (x N)*
• Over-discharge recover voltage: 12.6V (x N)*
• Over-discharge voltage: 11.1V (x N)*

*Note: (x N)*: When it comes to a 24V(N=2) or 48V(N=4) system, the voltage should multiply by the number of series batteries.

How to Connect Battery

1. Please make sure all batteries that are connected meet the following criteria:
   • Batteries have the Same Capacity (Ah), Same Voltage (V), and are the Same Type (lithium iron phosphate (LiFePO4)).
   • As the built-in battery management system (BMS) may vary between brands, we advise you to choose batteries from the Same Brand for connection.
2. For optimal performance, we kindly advise you to follow the requirements listed below:
   • Fully charge all ready-to-connect batteries.
   • All battery interconnect cables should be the same wire gauge (AWG) and length, and come from the same brand. Otherwise, the impedance will be inconsistent, resulting in unbalanced charge and discharge performance.
   • Connect your batteries one by one in series (up to 4 batteries) or in parallel (up to 4 batteries). Secure all cable connections between the cable lugs and terminals.
3. When determining the cable size (AWG) for your system, there are two factors to consider:
   • The size of the electrical load you want to power.
   • The distance between the electrical load and your batteries.

Cable Sizing Charts

Cables for Controller to Battery

Cables for Inverter to Battery

About Rated Power

• The max. rated power of this battery is 1280W. When connecting 2 batteries in parallel, the theoretical max. power is 1280W x 2 = 2560W.
• Because home appliances draw power from the inverter, so if you're using a 2560W battery bank, and the peak power of your home appliance is higher than 2000W, this home appliance will be unable to work via a 2000W inverter.
• The peak power of an AC motor appliance, such as an AC air conditioner or water pump, is double its rated power. For example, when using a 1500W AC air conditioner or water pump, it requires 2 x 1500W = 3000W of the battery bank and inverter to support normal working conditions.
• But please note that the peak power of some home appliances is 3 times the rated power.
• Please consult the manufacturers of your home appliances for the exact peak power data.

How to Charge the Battery

• The optimal charging current for a single lithium battery is around 20 amps, which can extend the battery's lifespan. And the maximum charging current is 50 amps. The amount of charging current is determined by your DC-DC charger, charge controller, or other compatible lithium battery charger you use.
• When the battery is fully discharged at a continuous 100A, we do NOT recommend re-charging it at 50A immediately, which will trigger high-temperature charging protection.

How to Store Battery

• To store your battery, keep it at least 30%-50% charged. We recommend that you charge the battery every 6 months when not in use to prevent overdischarge.

Performance Graphs (Textual Descriptions)

Discharge Curve at Different Temperatures (0.5C)

Graph showing battery voltage versus capacity percentage at various temperatures (from 122°F/50°C down to 14°F/-10°C) under a 0.5C discharge rate. Higher temperatures maintain voltage better as capacity depletes.

Charging Performance (0.5C, 77°F/25°C)

Graph illustrating battery charging performance at 77°F/25°C with a 0.5C rate, showing voltage and current changes relative to charging capacity percentage.

Cycle Life Versus Depth of Discharge (0.5C, 77°F/25°C)

Graph depicting the relationship between the number of charge/discharge cycles and the depth of discharge (DoD) at 77°F/25°C with a 0.5C rate. It indicates that shallower discharges result in a significantly higher number of total cycles. For example, 80% Depth of Discharge (20% remaining) yields over 3000 cycles, while shallower discharges yield significantly more.

Warranty

• Dr.Prepare LiFePO4 batteries are covered by a 10-year limited warranty from the original purchase date. If you encounter any issues during usage, feel free to contact us at support@drprepare.com.
• We only provide after-sales service for products sold by Dr. Prepare or retailers and distributors authorized by Dr.Prepare. If you have purchased your unit through other channels, please contact your seller for more information about the return and warranty.

Support Information

• Need help? Feel free to send us an email at support@drprepare.com.
• Want to see more products? Visit the website drprepare.com.