---
product_id: 188535540
title: "smallBMS Battery Management System with pre-alarm"
brand: "victron energy"
price: "A$110"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/188535540-smallbms-battery-management-system-with-pre-alarm
store_origin: AU
region: Australia
---

# 30s minimum pre-alarm delay 1A max output current Dual remote on/off control smallBMS Battery Management System with pre-alarm

**Brand:** victron energy
**Price:** A$110
**Availability:** ✅ In Stock

## Summary

> 🔋 Stay ahead of power failures with smart, silent battery management.

## Quick Answers

- **What is this?** smallBMS Battery Management System with pre-alarm by victron energy
- **How much does it cost?** A$110 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/188535540-smallbms-battery-management-system-with-pre-alarm)

## Best For

- victron energy enthusiasts

## Why This Product

- Trusted victron energy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Pre-Alarm Warning:** Get early visible or audible alerts before battery voltage drops critically, avoiding downtime.
- • **Versatile Compatibility:** Works flawlessly with Victron’s Phoenix Smart Charger, Cyrix-Li relays, and BatteryProtect units.
- • **Dual Remote On/Off Ports:** Effortlessly control BatteryProtect, inverters, DC-DC converters, and chargers remotely.
- • **Powerful 1A Output Control:** Seamlessly manage high-current relays or contactors with robust 1A output capacity.
- • **Compact & Lightweight Design:** Miniature footprint (4.17 x 1.65 x 0.91 inches) fits discreetly into any setup without bulk.

## Overview

The Victron Energy smallBMS is a compact, lightweight battery management system featuring dual remote on/off outputs with a 1A max current, and a pre-alarm output that triggers a warning after a 30-second delay when battery voltage is low. Designed for seamless integration with Victron’s BatteryProtect, inverters, chargers, and relays, it ensures proactive battery protection and control for professional-grade energy setups.

## Description

smallBMS Battery Management System with pre-alarm

## Features

- The Victron Energy smallBMS has two outputs
- Can be used to control the remote on/off input of a BatteryProtect, Inverters, DC-DC converter or other loads that have remote on/off port functionality
- Due to its maximum output current of 1A, it can even control a high-current relay or a contactor
- The pre-alarm output can be used to issue a visible or audible warning when the battery voltage is low and will trip with a minimum delay of 30 seconds
- Can be used to control the remote on/off port of a charger, such as the Victron Energy: Phoenix Smart Charger IP43, a Cyrix-Li-Charge relay, a Cyrix-Li-ct Battery Combiner or a BatteryProtect

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 6.77 x 5.51 x 1.97 inches |
| Package Weight | 0.12 Kilograms |
| Item Dimensions  LxWxH | 4.17 x 1.65 x 0.91 inches |
| Item Weight | 1 Grams |
| Brand Name | Victron Energy |
| Warranty Description | Warranty |
| Model Name | Victoron_Energy Unisex Adult NBA-540 SMALLBMS, Multicoloured, Mini BMS BMS400100000 |
| Color | multi-coloured |
| Material | Plastic |
| Suggested Users | unisex-adult |
| Number of Items | 1 |
| Manufacturer | VICTRON_ENERGY |
| Part Number | BMS400100000 |
| Included Components | Victoron_Energy Unisex Adult NBA-540 SMALLBMS, Multicoloured, Mini BMS BMS400100000 |
| Size | Mini BMS BMS400100000 |

## Images

![smallBMS Battery Management System with pre-alarm - Image 1](https://m.media-amazon.com/images/I/71llE45c71L.jpg)

## Questions & Answers

**Q: Victron has a different product with physical pre-alarm output. this one has no pre-alarm, as pictured? why title and description is wrong?**
A: You may be confusing this item with the bigger BMS units by Victron. I assure you this unit is a  miniBMS unit with a pre-Alarm system built in to a smaller form factor unit and size. To prove it look at the following link from Victron's website and if you think they are wrong in their title and description please feel free to bring it up with them. https://www.victronenergy.com/battery-management-systems/minibms

**Q: I built a 5p 4s lfp battery out of 10 amp hour headway lfp cells, 20 of them.  i need a reliable bms.  is there some way i can make the connections?**
A: I would recommend the larger BMS for that type of setup.

**Q: Wrong product? it's without pre-alarm. title and description is incorrect**
A: No its not. The pre-alarm function is fulfilled by the LED's and the pattern in which they blink giving you an error code. If you want the alarm to go off as a buzzer, siren, or email notification that's what the alarm outputs are for. It is on the consumer to install those extra items themselves.

## Frequently Bought Together

- Victron Energy smallBMS Battery Management System with pre-alarm
- Victron Energy Smart 12.8-Volt 200Ah LiFePO4 Lithium Battery

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-24*