SKU: 81794217337

Victron SmallBMS f/Smart LiFePO4 Batteries w/M8 [BMS400100000]

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Description

Victron SmallBMS f/Smart LiFePO4 Batteries w/M8 [BMS400100000]SmallBMS for Smart LiFePO4 Batteries with M8 A simple and low cost alternative to the VE. Bus BMS. The smallBMS can replace the VE. Bus BMS in several applications. It is however not suitable for use with VE. Bus MultiPlus and Quattro inverter chargers: it has no VE. Bus interface. The smallBMS is intended for use with Victron Smart LiFePo4 batteries with M8 circular connectors. The smallBMS has three outputs, similar to the VE. Bus BMS. Load

SmallBMS for Smart LiFePO4 Batteries with M8

A simple and low-cost alternative to the VE.Bus BMS. The smallBMS can replace the VE.Bus BMS in several applications. It is however not suitable for use with VE.Bus MultiPlus and Quattro inverter/chargers: it has no VE.Bus interface.

The smallBMS is intended for use with Victron Smart LiFePo4 batteries with M8 circular connectors. The smallBMS has three outputs, similar to the VE.Bus BMS. Load Disconnect output The Load output is normally high and becomes free-floating in case of the cell under voltage (default 2,8V/cell, adjustable on the battery between 2,6V and 2,8V per cell). Maximum current: 1A. The Load output is not short-circuit protected.

The Load output can be used to control:

  • A high current relay or contactor.
  • The remote on/off the input of a Battery Protect, inverter or DC-DC converter, or other loads.

Pre-alarm output

The pre-alarm output is normally free-floating and becomes high in case of the imminent cell under voltage (default 3,1V/cell, adjustable on the battery between 2,85V and 3,15V per cell). Maximum current: 1A (not short circuit protected).

The minimum delay between pre-alarm and load disconnect is 30 seconds.

Charge disconnect output

The Charger output is normally high and becomes free-floating in case of imminent cell overvoltage or over-temperature. Maximum current: 10mA. The Charger output is not suitable to power an inductive load such as a relay coil. 

The Charger output can be used to control:

  • The remote on/off of a charger
  • A Cyrix-Li-Charge relay
  • A Cyrix-Li-ct Battery Combiner

System on/off input

The system on/off input controls both outputs. When off, both outputs will be free floating so that loads and chargers are turned off. The System on/off consists of two terminals: Remote L and Remote H. A remote on/off switch or relay contact can be connected between L and H. Alternatively, terminal H can be switched to battery plus, or terminal L can be switched to battery minus.

Protects 12V, 24V and 48V systems

Operating voltage range: 8 to 70V DC.

LED indicators:

  • Load ON (blue): Load output high (cell voltage >2.8V, adjustable on the battery).
  • Temp or OVP (red): Charger output free floating (due to cell over temperature (>50°C), cell under temperature (<5 °C) or cell over voltage).
Please contact your dealer for any returns, repairs or support issues related to this product.
Quick Guide (pdf)
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Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 81794217337

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4.6 ★★★★★
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Anabel
Cuba, US
★★★★★ 4
Looked amazing… but not built for broader shoulders
Size: Small, Color: Blue, Size: Small, Color: Blue
I got this for my husband because he’s fully leaning into his cowboy era lately (new boots, new attitude, the whole thing), and I thought this shirt would seal the deal. First impression—honestly impressed. The color is really nice and the embroidery detail looks great in person. It doesn’t feel cheap at all and definitely looks more high-end than expected. For reference, he’s about 5’6”, 140 lbs with an athletic build. The shirt almost worked—it fit well through the body and could be fully buttoned, but the shoulders were just too tight. As soon as he moved his arms, it felt restrictive, like the seams were being pushed to their limit. Which is a shame… because wow, he looked GOOD in this. And that’s coming from someone who doesn’t usually love this style. I’d say this shirt runs better for slimmer or narrower builds. If you’ve got broader shoulders or any upper body muscle, you may want to size up or skip this one. Overall, great quality and style, just not the right fit for an athletic frame.
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Reviewed in the United States on March 28, 2026
B
Ben
Lowell, US
★★★★★ 5
A Western Shirt That Works as Hard as It Looks
Size: Medium, Color: Blue
A Western Shirt That Works as Hard as It Looks This men's western shirt strikes a really solid balance between style and everyday wearability. The cotton-polyester blend fabric keeps things soft and breathable without feeling too heavy, and the exquisite floral embroidery on the turn down collar adds a level of detail that makes it look far more elevated than a basic button down. Whether you're heading to a country concert, a western-themed party, or just pairing it with jeans and cowboy boots on a casual day out, it fits the moment without trying too hard. The versatility here is genuinely one of the stronger selling points. It works just as well at a rodeo or western-themed wedding as it does for everyday casual wear, and the timeless embroidered design means it won't feel dated after a season. Care is simple with machine or hand wash and hang to dry, so it's low maintenance for something that looks this put together. It also makes a thoughtful and practical gift for a husband, boyfriend, or father who appreciates a little western flair in their wardrobe. Just make sure to check the size chart carefully before ordering since sizing can vary with this style of shirt.
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Reviewed in the United States on April 6, 2026
B
Verified Purchase
Buzz
Grantham, US
★★★★★ 5
Well Made
Size: X-Large, Color: Navy Blue
When my husband put this shirt on, the women comment him on how he looks. I have to admit "He looks great in this attractive western shirt." The blue is a nice blue. He bought a black one, too and it is also very well made and nice looking. The sizing was perfect. It is wrinkle resistance, a great fabric thickness and comfortable. Definitely would buy him another if these ever wear out. It is a great value for the money.
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Reviewed in the United States on April 9, 2026
P
Verified Purchase
Punkin's Mommy
Boise, US
★★★★★ 5
Great Quality - Son loves it!
Size: Large, Color: Black
I ordered this beautiful Western shirt for my son for Christmas. He loves it so much he wears it once a week. The quality is excellent. The fabric is relatively thick, but not too thick - a nice, sturdy fabric. The embroidery is absolutely beautiful! It looks even better in person. The large fit him true to size, like all his other size large men's button up shirts. There are no loose threads or flaws in the stitching. It looks and feels expensive - well worth every penny of the $40 price. It has held up well in the wash. There has been no fading or shrinking. It is now March and it has been washed once a week since Christmas. (Please note - I don't put it in the dryer. I hang it to dry.) I highly recommend if you are looking for a fancy Western shirt.
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Reviewed in the United States on March 12, 2025
M
Verified Purchase
Marina Maroquin
Dallas, US
★★★★★ 5
Got more than I paid for and am so impressed!
Size: Medium, Color: Burgundy, Size: Medium, Color: Burgundy
Absolutely stunning! Great material quality and embroidery work. Every bit the same as those you'd buy at Boot Barn or other western stores for $70 to $100. I'm so impressed!! I purchased these for my son's band (4 shirts for 4 band members) and the band members love them. This saved me so much money. I'm so happy with them and plan to purchase more of these in different colors and styles. The men said they're comfortable and love wearing them.
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Reviewed in the United States on February 25, 2025

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