Description
xVictron Energy smallBMS — BMS400100000
The Victron Energy smallBMS is a compact battery management system designed for use with Victron lithium iron phosphate (LiFePO4) batteries. It protects the battery from over-charge, over-discharge and excessive discharge current, making it suited to small off-grid systems, marine installations and mobile applications where space and weight are at a premium.
Key Features
- Provides over-charge and over-discharge protection for Victron LiFePO4 lithium batteries.
- Controls a load disconnect output to protect the battery from deep discharge.
- Controls a charge disconnect output to prevent over-charging from external chargers.
- Compact and lightweight at just 80 g, suitable for space-constrained installations.
- Designed specifically for use with Victron Smart lithium batteries in smaller system configurations.
- Simple wiring interface reduces installation complexity compared to full-featured BMS units.
Product Overview
The smallBMS monitors cell voltages within a Victron LiFePO4 battery and acts on two key outputs: a load disconnect and a charge disconnect. When the battery reaches a critically low state of charge, the load disconnect output signals connected devices (such as a battery protect or inverter remote) to cut the load before cell damage occurs. When the battery is fully charged, the charge disconnect output signals chargers to stop, preventing over-voltage.
This unit is intended for smaller systems where a full-featured BMS with CAN-bus communication is not required. It is compatible with Victron's range of small lithium batteries and works alongside components such as the Victron BatteryProtect and compatible MPPT solar charge controllers. The smallBMS does not provide active cell balancing or communication to a GX device, so it is important to confirm compatibility with your specific battery model and system design before installation.
Technical Specifications
- SKU: BMS400100000
- GTIN: 8719076043485
- Weight: 0.08 kg (80 g)
- Compatible battery chemistry: Victron LiFePO4 (lithium iron phosphate)
- Category: Battery Management Systems (BMS)
Applications
- Small off-grid solar systems using Victron lithium batteries.
- Marine and narrowboat 12 V or 24 V lithium battery installations.
- Campervans, motorhomes and other mobile power setups.
- Portable power stations and lightweight energy storage builds.
- Backup power systems where a compact BMS solution is required.
What Is Included
- 1 x Victron Energy smallBMS (BMS400100000)
Installation Notes
The smallBMS must be used exclusively with compatible Victron LiFePO4 batteries. It is not suitable for lead-acid, AGM or gel battery chemistries. Wiring should be carried out by a qualified electrician or experienced installer familiar with lithium battery systems. Incorrect wiring of the load disconnect or charge disconnect outputs can result in battery damage or system failure. Always refer to the Victron wiring schematics for your specific battery and system components before commissioning.
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:
- 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.