Smart LITHIUM Plug & Play MULTI 24V 54Ah


Extreme power delivery, compact & lightweight

• True Plug & Play installation
– Improved 2024 capacity
– An easy upgrade that anyone can do
– Upgrade your batteries without the need to change/upgrade chargers, alternators, or other equipment.

• Cylindrical Bolted Cells

• SUNBEAMsystem Multi Connect App compatible (IOS & Android)
– Integrated with the BMS for full info availability
– App out-of-focus notifications, and top bar indicator for full control.
– Connects simultaneously to all SUNBEAMsystem devices
– Configurable grouping of multi-devices to show them as one cluster
– Add MoonRay solar charge controllers in your local App network

• Safest technology on the market
– Vibration Proof
– Lithium phosphate (LiFePO4) is the safest chemistry available
– Multiple electronic safeguards for any situation
– Mechanical fire safety valves

• 5 years warranty. * Terms apply.

In stock (can be backordered)

SKU: SmartLiPP-Multi-24-54 Categories: ,

High Current Battery Management System

3-Layered Safety Design

Internet & Local App Monitoring

Bolted Cylindrical Cells


A truly smart and state-of-the-art battery, packed with the latest features and the safest and most powerful LiFePO4 technology. A true drop-in replacement for your outdated lead-acid batteries.

Since its debut in 2016, the SMART LITHIUM Plug & Play series has set the standard for those desiring a seamless, do-it-yourself battery upgrade. We’re continuously innovating: both the hardware and software have received annual enhancements to ensure peak performance and compatibility.

The recent enhancements across the SMART LITHIUM series mark a significant leap forward, with an 8% increase in capacity and improved current capabilities enhancing both efficiency and reliability. At the heart of the series lies a commitment to continuous advancement, underscored by frequent software updates.

It’s well-known that lithium batteries provide double the usable capacity of lead-acid counterparts, with considerably lower charging and discharging losses. On top of that SMART LITHIUM’s exceptionally durable cells and configuration ensure minimal capacity loss over time – less than 20% after over 5,000 cycles (but often significantly less). This durability also extends to winter use and offers greater flexibility with fewer limitations than traditional lithium batteries. Such unparalleled robustness is why we confidently refer to it as Plug & Play, setting a new standard in battery technology and user convenience.

Seamless Upgrade

Our Plug & Play series provides an effortless DROP-IN solution to replace any old-style battery. Designed to mimic lead-acid characteristics, it’s Alternator Friendly, ensuring compatibility without the need for additional equipment or complex alterations. SUNBEAMsystem SMART LITHIUM is crafted from the ground up to simplify your upgrade process. We ensure a straightforward replacement experience when you maintain your starter battery and switch your domestic batteries to SMART LITHIUM Plug & Play, making it an easy upgrade for everyone.

Quick Charge

Super Quick Charge enables the ONE to reach 90% charge in under 30 minutes. MULTI can be charged in half of that time, still very fast. Multi stands unrivaled in the market for those needing multiple batteries in their domestic battery bank. A wide temperature usage range and an extended lifetime ensure enhanced usability. The unique Plug & Play feature guarantees compatibility with older equipment, including gentle handling of your alternator. This series delivers unmatched performance and convenience.

Realtime Monitoring

Local & Remote via Internet

The enhanced Smart Mobile Home feature enables you to transform a tablet into a central command center, complete with display capabilities. Utilizing our Multi Connect app, you can effortlessly share and manage data with family members nearby. Moreover, the option to enable internet connectivity expands your ability to exchange information seamlessly across your and your family members’ devices.

This functionality facilitates real-time monitoring and control of data from your batteries, as well as from other devices compatible with Smart Mobile Home. Additionally, you gain access to a personal webpage by logging in, where you can view and analyze all your compiled data and statistics in one convenient location.


SUNBEAMsystem SMART LITHIUM is not just any battery – it’s a cutting-edge power solution packed with advanced technical innovations, all housed in a sleek black casing. The SMART LITHIUM Plug & Play Series is a simple drop-in replacement for your old, low-tech batteries, but with the added benefits of a fully-featured Battery Management System.

The MULTI models are designed for those who need a larger storage capacity. They can be used in parallel with other batteries to create larger battery banks and as part of our Plug & Play series incredibly easy to upgrade your current system without extensive planning or support.

The SUNBEAMsystem SMART LITHIUM batteries feature a state-of-the-art build-up, utilizing cylindrical 32700 cells without tabs. This ingenious design allows for a much longer life expectancy while still providing the same high performance and usability as other lithium-ion batteries. With this cutting-edge technology, our batteries are the perfect choice for those seeking a long-lasting, reliable power source.

The SUNBEAMsystem SMART LITHIUM MULTI models offer an unbeatable combination of power, convenience, and reliability, with improved capacities of up to 108Ah for 12V systems, and the new 54Ah – 24V MULTI model. Upgrade your system today and experience the most advanced user experience on the market.

Stainless Power Matrix

Tab-less 3270 cells bolted to a steel structure

A key factor in the success of SUNBEAMsystem’s batteries, particularly the Plug & Play series, is our unique construction method, the Stainless Power Matrix. This process requires significantly more time and investment than the industry standard. Unlike typical methods that favor cost-saving measures like soldering or laser welding, soft plastic frames, and the use of prismatic cells, we instead focus on long-term quality. Our commitment is to craft a product that not only performs superiorly but also embodies excellence in every aspect of its design and functionality.

● Cylindrical cells: For our high-performance models like Plug & Play, we exclusively use cylindrical cells which offer several advantages over prismatic cells, such as better heat resistance, heat dissipation, increased mechanical stability, and lifespan.

● Upgraded to 3270 cells: The bolted 3270 cells we use are unique. They are hard to distinguish from ordinary cells by eye, but their larger size is distinctive. We made the switch from smaller cells many years ago, a move now reflected in the car industry where leading manufacturers (e.g., Tesla and Rivian) are working hard to make a similar technological leap by upgrading from smaller 2170 cells to the larger 4680 cells.

● Cells are NOT connected by soldering: The Plug & Play batteries use tab-less cylindrical cells; we avoid connecting the cells with soft tabs as a battery built in this way has an increased risk of failure during shocks and vibrations (even despite laser welding). Such solutions also create a higher electrical resistance between the cells. Higher resistance results in worse efficiency and performance.

● Cells bolted to a steel structure for stability & better conduction: We use a unique construction that is exceptionally robust both physically and electrically. The individual cells are bolted, one by one, to a frame constructed in stainless steel. This makes the battery incredibly robust and shape-retaining, while also providing excellent heat dissipation. Compare this with an industry where reliance on plastic fixation is all too common.

The construction with a stainless, stable structure and bolted cylindrical cells delivers unbeatable quality over time, with numerous positive effects such as exceptional performance and guaranteed enhanced safety.

The Multi Layered Safety Concept

The answer to why SMART LITHIUM is safer than your old batteries

SUNBEAMsystem’s SMART LITHIUM batteries are designed with an unparalleled safety architecture, distinguishing them from conventional lithium-ion technologies. Here’s how we ensure the highest safety standards:

  1. Advanced Chemistry for Superior Safety
    Unlike traditional lithium-ion batteries, which have been linked to safety incidents, our batteries utilize Lithium Iron Phosphate (LiFePO4) chemistry. This is widely recognized as the safest battery chemistry available, significantly reducing the risk of accidents.
  2. Built-in Fire Safety Valves
    Each cell is equipped with a fire safety valve, a critical safety feature that acts as a last line of defense. In extreme scenarios, such as if the battery were exposed to intense heat or fire, these valves would activate to mitigate any potential hazards, ensuring safety.
  3. Comprehensive Electronic Protection
    Beyond physical safety mechanisms, our batteries are fortified with an advanced electronic protection system. This proactive system not only safeguards the batteries by ensuring they are operated within safe parameters but also responds dynamically to protect against unforeseen incidents.

Certified Safety Under All Conditions

Our batteries are rigorously tested to withstand extreme conditions without sacrificing safety. Their bolted, solder-free rigid layout, along with the preference for cylindrical over prismatic cells, significantly bolsters safety.

Certified Resistance To:

● Penetration, Crushing, Fire
● Repeated Vibrations, Shock Impact
● Short Circuiting, Overcharging

Thanks to these extensive safety features, SUNBEAMsystem’s SMART LITHIUM emerges as one of the market’s safest battery choices. Our commitment to layered safety has granted the SMART LITHIUM series a distinguished air transport certification under UN 38.3 legislation, underscoring its outstanding safety credentials.

Multi Connect App

Unparalleled Convenience at your Fingertips

Exclusively for SUNBEAMsystem battery users, the Multi Connect APP revolutionizes the way you manage multiple batteries within a domestic bank. It stands out with its array of user-centric features:

Seamless Integration with BMS
Directly access comprehensive battery information without the need for external sensors or shunts, ensuring you get accurate data straight from the source.

Intuitive Notifications & Top Bar Indicator
Maintain awareness of your vessel’s battery status effortlessly. The app displays your battery’s state of charge right alongside your phone’s battery level for constant visibility, complemented by informative notifications.

Aggregate Group Information
Designed with the understanding that batteries often function in concert, the app presents a unified view of your battery group, eliminating the hassle of toggling between individual units.

Customizable Interface
Tailor the app’s layout and screen size to your preferences. If you have several vessels then easily add them to a quick list. The app continuously evolves, offering free updates and new features to enhance your experience.

Show information from other sensors and products
Show info and control other Multi Connect App compatible hardware.

Local & Internet sharing
Benefit from the Mobile Smart Home solutions.

The MULTI CONNECT APP embodies our dedication to innovation and convenience, providing SUNBEAMsystem users with a smart, streamlined way to manage their battery systems efficiently and effectively.

Create a true Smart Mobile Home

Elevate Your On-The-Go Living with the Mobile Smart Home Functionalit

Unlock unparalleled convenience aboard your yacht or RV with the free Mobile Smart Home feature within the Multi Connect app. With just a flip of a switch in the app, you can effortlessly integrate smart home capabilities into your mobile lifestyle. Opt for a tablet of your choice, selecting the ideal size for your space, and mount it securely using our universal wall bracket for an efficient, stylish control panel / instrument. Incorporate our Screen Power Saver (PIR) to ensure that your central hub maintains minimal energy usage.

Enhanced Features of the Mobile Smart Home

On-Wall Control Center
A dedicated tablet serves as your sophisticated, on-wall smart home command station, offering convenience and control at your fingertips.

Local Device Sharing
Seamlessly share access and control with all crew members on board, enabling a cohesive and connected living environment.

Internet Sharing for Remote Access
Extend smart home functionalities to yourself & family, allowing them to stay connected and informed, no matter where you are. (requires the tablet of your choice to have internet access i.e. sim card).

Real-Time Online Dashboard
Access an exclusive web page that provides up-to-date statistics and controls for your smart home system, available from anywhere in the world.

Compatibility with Expanding Ecosystem
Our system, compatible with a wide range of devices and sensors, enhances integration and living experience. Featuring Moonray charge controllers and Smart Switch among others, our ever-expanding ecosystem is compatible with the Multi Connect App.

The Smart Home functionality in the Multi Connect app is specifically designed for yachts and RVs, providing an easy, innovative solution to manage your living space. It not only simplifies control over your environment but also ensures that your mobile home or yacht is equipped with the latest in smart technology, adaptable to your unique lifestyle needs.


ArticleCapacityCell TypeMax Charge currentMax Discharge CurrentPeak Discharge (10s)WeightDimensions
One 12V 108Ah108AhCylindrical 32700200A200A600A14.2 kg32.3 x 17.1 x 22 cm
One 12V 120Ah120AhCylindrical 32700240A240A750A14.9 kg32.3 x 17.1 x 22 cm
Multi 12V 108Ah108AhCylindrical 32700100A100A400A14.2 kg32.3 x 17.1 x 22 cm
Multi 24V 54Ah54AhCylindrical 3270050A50A200A14.2 kg32.3 x 17.1 x 22 cm
ModelS 12V38AhCylindrical 3270060A80A140A4.75 kg13 x 19.5 x 16.5 cm

Even after thousands of charging cycles, the Smart Lithium will continue to perform.

Depth of DischargeNumber of charge cycles
100%2000 Cycles
80%2500 Cycles
70%3000 cycles
50%5000 cycles
Multi 24V – 54Ah
Cell TypeCylindrical 32700
Max Charge current50A
Max Discharge Current50A
Pulse Discharge (10s)200A
Weight14.2 kg
Dimensions32.3 x 17.1 x 22 cm

Even after thousands of charging cycles the Smart Lithium will continue to perform.

Depth of DischargeNumber of charge cycles
100%2000 Cycles
80%2500 Cycles
70%3000 cycles
50%5000 cycles

Additional information

Weight14.2 kg
Dimensions33 × 23.5 × 17.5 cm