12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty)
- 【Space Saving. True 3,840Wh. 10-Year Lifespan】 57% smaller than 3× 100Ah batteries and 41% smaller than ordinary 300Ah batteries, the HQST 12V 300Ah LiFePO4 battery is easier to install and more space-efficient. Measuring 15.16” (L, incl. side handles) × 7.68” (W) × 10.24” (H, incl. terminals), it delivers 3× the energy of a standard 100Ah battery—without taking up 3× the space. Backed by a true-rated 3,840Wh capacity and a 10-year lifespan with product support.
- 【EV-Grade A+ High-Density Cells. 200A Discharge】 The HQST 12V 300Ah LiFePO4 Battery is built with EV-grade A+ high-density cells for stable, long-lasting power. With a 200A continuous discharge rate, this lithium battery easily handles high-power appliances. Advanced BMS provides full protection against overcharge, over-discharge, short circuits, and low/high temperature, keeping your system safe even in extreme conditions.
- 【Upgrade to HQST LiFePO4 Batteries】 HQST lithium batteries deliver a true upgrade over traditional SLA—lasting up to 10 years, compared to just 1-3 years for most SLA batteries. Weighing only 57 lbs, this 12V 300Ah LiFePO4 battery is 70% lighter than 3× 100Ah SLA batteries combined, while providing more consistent, reliable power. It also features a built-in BMS for advanced protection—something SLA batteries simply can’t offer.
- 【Series & Parallel Ready. Scalable Power Expansion】 Supports both series and parallel configurations. Create 24V, 36V, or 48V battery banks in series, or expand to 12.8V 600Ah, 900Ah, or 1200Ah in parallel. Connect up to 16 batteries (4P4S) to reach a powerful 61.44kWh home backup system, ideal for emergency outages, hurricane season, snowstorms, and high-demand appliances.
- 【Charging & Discharging. HQST One-Stop Solar Solution】 Supports solar charging (with a charge controller) and AC-to-DC LiFePO4 chargers for flexible power input. Do not use SLA or general-purpose chargers. Optimal charge current: 60A (Max: 100A). Max continuous discharge: 200A. HQST offers high-quality solar panels, controllers, and inverters—everything you need to build a reliable off-grid solar system.
12V 300Ah LiFePO4 Lithium Battery - Compact Size (10 Year Warranty) - 1 Pack is backordered and will ship as soon as it is back in stock.
Frequently Asked Questions
Can it be used in cold weather?
Can it be used in cold weather?
This HQST 12.8V 300Ah LiFePO4 battery is equipped with low-temperature cut-off protection.
Charging cut-off range: 23℉to 41℉(-5℃to 5℃)
Discharging cut-off range: -13℉to 5℉(-25℃to -15℃)
The battery will automatically resume operation once the temperature rises above the cut-off point, helping to prevent damage in extreme cold conditions.
Can I use my sealed lead-acid battery charger to charge this LiFePO4 battery?
Can I use my sealed lead-acid battery charger to charge this LiFePO4 battery?
No, you can’t. Using a sealed lead-acid (SLA) charger may cause irreversible damage to the battery. You must use a compatible LiFePO4 (lithium iron phosphate) AC-to-DC charger.
If you’re using a solar off-grid system, you can charge the battery with solar panels and a charge controller that supports LiFePO4 batteries. Make sure to set the controller to the LiFePO4 battery type and configure the correct charging voltage.
Does this battery have low voltage cut-off protection?
Does this battery have low voltage cut-off protection?
Yes, it does. The battery will automatically shut off when the discharge voltage drops below 9.2V to protect against over-discharge. It will recover once the voltage rises above 11V.If the battery enters low voltage protection mode, follow these steps to restore it:
1. Disconnect all wiring.
2. Use a LiFePO4-compatible charger or solar charge controller with an activation function.
3. Make sure the ambient temperature is above 41℉(5℃) and charge the battery until the voltage exceeds 11V.
Will the battery come with terminals? And if not, what size are the connector terminals?
Will the battery come with terminals? And if not, what size are the connector terminals?
Yes, the battery comes with four M8 bolts.
Can I charge the battery directly using a solar panel?
Can I charge the battery directly using a solar panel?
No, you can’t. When charging this battery with a solar panel, you must use a solar charge controller (either PWM or MPPT) between the panel and the battery. Directly connecting the panel to the battery can lead to unstable power output, which may damage the battery or connected devices.
Can this battery be used as a starter battery?
Can this battery be used as a starter battery?
No, it can’t. This battery is designed for low to moderate continuous power applications that require stable energy storage and delivery, such as RVs, off-grid solar systems, and home energy storage.It is not suitable for applications that require high starting currents or power surges, such as engine cranking for cars or boats, or use in golf carts.






















