ReliOn LiFePO4 Lithium Battery 12V 100Ah

ReliOn LiFePO4 Lithium Battery 12V 100Ah: the solution for motorhomes, campervans, solar and boats

If you're looking for a reliable lithium battery to replace lead-acid in your setup, the ReliOn RB100 is a 12V 100Ah LiFePO4 battery designed for anyone who needs plenty of usable energy in a compact, lightweight package. It's a common choice for motorhomes, converted campervans, off-grid solar panel installations at home, and also on board boats, where weight and reliability are critical.

Use cases: where this 12V lithium battery performs best

Motorhome and campervan

A lithium battery for motorhomes like this one lets you run compressor fridges, LED lighting, diesel heating, inverters and onboard electronics for longer, even during winter storage or off-grid stays. Because it tolerates deep discharge without damage, you can use practically 100% of its rated capacity, something an AGM battery can't do without shortening its lifespan.

Off-grid solar installations

Paired with solar panels and an MPPT controller, this battery for solar panels stores the energy generated during the day so you can use it at night or on cloudy days. Its high charge efficiency (99%) reduces losses compared to lead-acid, meaning you need less panel surface to charge it fully.

Marine use

Onboard, the weight saving compared to an equivalent lead-acid battery is significant, which translates into lower fuel consumption and better handling on the water. Its rugged casing and integrated BMS make it well suited to the demanding environment of a boat.

Lithium battery vs. AGM/Gel: why choose LiFePO4

Compared to an equivalent AGM or Gel battery, this 12V 100Ah lithium battery offers several advantages: greater real depth of discharge, far more charge/discharge cycles over its lifetime, much lower weight (less than half), stable voltage throughout discharge (without the gradual drop typical of lead-acid), and a built-in BMS that protects against overcharge, over-discharge and short circuit. In exchange for a higher upfront cost, the cost per cycle and per Wh used is usually lower over the medium term.

Installation and compatibility

The RB100 works with standard 12V chargers, solar controllers and inverters already found in most motorhome, campervan or boat setups. Its internal BMS manages cell protection, so no additional external controller is required for normal domestic use. We recommend respecting the charge temperature range stated in the datasheet and using cabling and terminals rated for its maximum current.

Frequently asked questions about the ReliOn RB100 lithium battery

Can I directly replace my AGM or Gel battery with this lithium battery?

In most 12V setups, yes, as long as your charger or controller 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 to an AGM?

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

Can it be installed in any position?

Yes, since it contains no liquids or corrosive gases like lead-acid batteries, it supports different mounting orientations, although it should always be secured properly to avoid impacts or vibration.

Do I need a special controller or charger for solar panels?

You need an MPPT controller that's lithium-compatible or has a configurable LiFePO4 charge profile, to make the most of this battery's charging efficiency.

Is it suitable for use on boats?

Yes, many users choose it for boats thanks to its low weight compared to lead-acid and its stable behaviour under deep discharge, always respecting the manufacturer's installation conditions.

Do you ship to the Canary Islands?

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