Description
xVictron Lithium SuperPack 12.8V / 20Ah (M5)
The Victron Lithium SuperPack 12.8V/20Ah is a compact lithium iron phosphate (LiFePO4) battery designed for mobile, marine, and off-grid applications where weight and cycle life matter. It includes a built-in battery management system (BMS), making it a self-contained drop-in solution for 12V systems. Suited to professional installers and system integrators working on space-constrained or weight-sensitive installations.
Key Features
- Lithium iron phosphate (LiFePO4) chemistry offers a significantly longer cycle life compared to lead-acid alternatives.
- Built-in BMS provides cell balancing, over-charge, over-discharge, short-circuit, and over-temperature protection without requiring external components.
- Nominal voltage of 12.8V with 20Ah capacity, giving 256Wh of usable energy in a compact form factor.
- M5 terminal connection for secure, low-resistance cable attachment.
- Low self-discharge rate makes it suitable for seasonal or standby applications.
- Weight of 3.3kg, considerably lighter than an equivalent lead-acid battery.
Product Overview
The SuperPack range from Victron Energy uses LiFePO4 cells, which are the most thermally stable lithium chemistry available for energy storage. Unlike lithium-ion chemistries, LiFePO4 does not present the same thermal runaway risk, making it a practical choice for enclosed spaces such as boat bilges, vehicle cabinets, and caravan battery compartments. The integrated BMS means no separate protection board is required, reducing installation complexity and potential points of failure.
At 20Ah, this battery is well suited to smaller auxiliary loads: lighting circuits, instrumentation, communication equipment, and similar 12V DC applications. The M5 threaded terminals accept standard ring terminals and are compatible with typical marine and automotive cable lugs. Because the BMS is internal, the battery presents a clean two-terminal interface to the rest of the system, simplifying wiring.
Victron's SuperPack batteries are not designed for parallel or series connection. Each unit operates as a standalone battery. For larger capacity requirements, a different battery from the Victron range with external BMS support should be specified instead.
Specifications
- SKU: BAT512020705
- Nominal voltage: 12.8V
- Capacity: 20Ah (256Wh)
- Chemistry: Lithium Iron Phosphate (LiFePO4)
- Terminal type: M5
- Weight: 3.3kg
- GTIN: 8719076047537
Applications
- Auxiliary battery for marine vessels (navigation lights, instruments, VHF radio)
- Leisure and touring caravans requiring a lightweight 12V house battery
- Campervans and motorhomes with limited battery compartment space
- Off-grid lighting and small DC load circuits
- Portable power stations and field equipment
- Backup power for 12V control systems and communications equipment
What Is Included
- 1x Victron Lithium SuperPack 12.8V/20Ah (M5) battery
Installation Notes
The built-in BMS handles cell-level protection, but correct system design is still required. Ensure the charger used is compatible with LiFePO4 voltage profiles (absorption voltage typically 14.2V, float 13.5V). Do not connect this battery in series or parallel with other units. For marine installations, secure the battery against movement and protect terminals from moisture ingress. Installation should be carried out by a qualified electrician or marine engineer familiar with lithium battery systems.
Return Policy
xWe offer a 14-day, no-quibble returns or replacement policy because we want you to be totally satisfied with your purchase.
If you are unhappy in any way with your purchase, you can return it for a refund or a replacement, as long as you return it in the same condition as it arrived (original/undamaged packaging and product) and within 30 days of receiving it. We will pay for your return postage on a faulty item as long as you send it using Royal Mail 2nd class recorded delivery (for EU or International Shipments, you have to use our UPS account, we will provide you with a return label)
Please keep in mind the following:
- Non-faulty items returned after 14 days and/or not in their original, undamaged packaging can only be exchanged for store credit - 15% off the items returned.
- Items returned within 14 days but not in their original and undamaged packaging will also incur a -15% charge per package.
- If you return an item that doesn't adhere to our returns procedure or doesn't include a returns form, you may be liable for a £10 administration fee
- Individual items from a bundle can't be returned, refunded or exchanged. If you want a refund/credit/exchange for a bundle, all items must be returned to us.
Before you return your item, please make sure that:
- You follow our returns process (outlined below)
- The goods and packaging are undamaged
IMPORTANT: We need to be able to identify an item with your order. We can only do this if you follow our returns process. Please do not send us items back that do not follow this process as they cannot be identified properly and will not be replaced or refunded.
What delivery method do I need to use when returning an item?
You must send the goods back to us via Royal Mail 2nd class recorded delivery. Refunds on faulty items returned are reimbursed within 5 working days.
Can I return just one item from multiple purchases?
Yes. Once you start the returns process you will go to a page that will allow you to choose which items you want to be replaced or refunded.
Returning faulty goods
If your item is faulty, you need to follow the returns policy, where you will be able to state that it’s faulty. The product will then arrive at our warehouse for testing.
If your purchase is not within 14 days
You can still exchange your item for a different product or for credit to use on the Voltacon Solar or Ledison-led-lights.co.uk websites (-15% from the credit amount).
Returns outside of the 14-day period do not qualify for the free returns policy.
Returning an item within the warranty
If you have a warranty and want to return a faulty item, you just need to follow our standard returns process. When we receive your item, we will then check that it’s within warranty and for any faults before arranging a replacement.