ReliOn LiFePO4 Lithium Battery 12V 300Ah

ReliOn LiFePO4 Lithium Battery 12V 300Ah: high capacity and deep cycle performance

The ReliOn RB300 is a lithium battery with a 12.8V nominal voltage and 300Ah (3840Wh), designed to replace lead-acid battery banks in high-consumption installations, with much lower weight than the equivalent. It's a common choice for boats, motorhomes and high-capacity solar systems.

Use cases: where this 300Ah lithium battery performs best

Motorhomes and campers with high autonomy

A lithium leisure battery like this one can power fridges, air conditioning, high-power inverters and other equipment for much longer, making use of practically 100% of its rated capacity thanks to its tolerance for deep discharge.

High-capacity solar installations

Paired with several solar panels and a high-power MPPT regulator, this battery for solar panels allows you to build high-capacity storage systems with a 99% charge/discharge efficiency.

Marine use

On board, the weight saving compared with an equivalent lead-acid battery bank is very significant (34.36 kg versus over 90 kg), which improves handling on the water and makes installation easier in tight spaces.

Lithium battery vs. AGM/Gel: why choose LiFePO4

Compared with an equivalent AGM or Gel battery bank, this 12V 300Ah lithium battery offers several advantages: greater real depth of discharge, many more charge and discharge cycles over its service life, much lower weight and an internal BMS that protects against overcharge, over-discharge and short circuit. In exchange for a higher upfront investment, the cost per cycle and per Wh used is usually lower in the medium term.

Installation and compatibility

The RB300 works with standard 12V chargers, solar regulators and inverters. Its internal BMS manages cell protection, so no additional external controller is required for normal domestic use. It's recommended to keep within the charging temperature range stated in the datasheet and to use cabling and terminals rated for its maximum current.

Frequently asked questions about the ReliOn RB300 lithium battery

Can I directly replace my 12V lead-acid battery bank with this lithium battery?

In most 12V installations, yes, as long as the charger or regulator supports lithium (LiFePO4) charge profiles. If your equipment is older, it's worth checking compatibility or adding a dedicated lithium charger.

How long does a LiFePO4 lithium battery like this last compared with an AGM?

LiFePO4 batteries offer many more charge and discharge cycles than an equivalent AGM or Gel battery, which in typical motorhome or solar use translates into several extra years of service life.

Do I need a special solar regulator or charger?

You need an MPPT regulator compatible with lithium, or with a configurable LiFePO4 charge profile, to get the most out of this battery's charging efficiency.

Is it suitable for use on boats?

Yes, many users choose it for boats due to its low weight compared with lead-acid and its stable behaviour during deep discharges, always in line with the manufacturer's installation conditions.

Do you ship to the Canary Islands?

Yes, we ship this ReliOn lithium battery to the Canary Islands.