SKU: 19815615937

REC 2Q BMS wiring harness

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Description

REC 2Q BMS wiring harnessREC 2Q BMS Wiring Harness: Precision Connectivity for Advanced Battery Management Engineered for Seamless Integration with REC 2Q BMS Systems The REC 2Q BMS wiring harness is a purpose built cable assembly designed to connect the REC 2Q Battery Management System to your lithium battery bank with accuracy and reliability. This harness eliminates the guesswork and potential faults of generic wiring, providing labelled, pre configured connections that

REC 2Q BMS Wiring Harness: Precision Connectivity for Advanced Battery Management

Engineered for Seamless Integration with REC 2Q BMS Systems

The REC 2Q BMS wiring harness is a purpose-built cable assembly designed to connect the REC 2Q Battery Management System to your lithium battery bank with accuracy and reliability. This harness eliminates the guesswork and potential faults of generic wiring, providing labelled, pre-configured connections that streamline installation and enhance system integrity. Whether you are commissioning a new off-grid energy storage system, upgrading an existing setup, or replacing a damaged harness, this assembly ensures your BMS communicates effectively with cells, sensors, and external devices.

In complex DC power systems, signal integrity is critical. Poor-quality or improvised wiring can introduce noise, voltage drops, and intermittent connections that compromise battery monitoring and protection. The REC 2Q harness uses high-quality connectors and clearly identified conductors to maintain stable data transmission and accurate cell voltage readings, reducing the risk of BMS faults and system downtime.

Key Features at a Glance

  • Pre-assembled connectors for all five 2Q BMS ports, eliminating wiring errors
  • Labelled cell sense wires for 4 to 16 lithium cells, simplifying termination
  • Integrated CAN Bus lead with Weipu SP13 connector for Victron and other compatible devices
  • Dual DS18B20 digital temperature sensors for precise thermal monitoring
  • Shunt sense cable with 4mm lugs for accurate current measurement
  • Remote ON/OFF switch and configurable I/O wires for external control and alarms
  • Spare RS485 connector included for custom industrial interfaces

Complete Connectivity for Your BMS

This harness covers every interface on the REC 2Q BMS, ensuring you have the right connections from the start. The CELLS connector provides 17 labelled wires (Cell 1- to Cell 16+) plus Pack - and Pack + power supply leads, all cut to a 2-metre length for flexible routing within your battery enclosure. A dedicated pre-charge wire is also included, supporting safe system startup without the need for additional components.

The Isens Tsens connector features two DS18B20 digital temperature sensors and a shunt sense cable terminated with 4mm lugs. The temperature sensors allow the BMS to monitor cell or ambient temperatures at two points, enabling precise thermal management and protection. The shunt sense cable connects directly to a battery shunt, with the "+" lug clearly marked for the battery side, ensuring correct polarity and reliable current data.

CAN Bus and Communication Integration

The RS485 CAN T Cp connector includes a 0.5-metre CAN Bus lead terminated with a Weipu SP13 circular connector. This interface is commonly used to link the BMS with Victron GX devices, inverters, and other CAN-enabled equipment. A termination jumper is pre-installed on the "T" pins, simplifying network setup. For RS485 communication, the harness provides a spare connector with pins on the RS485-0 port, allowing installers to wire a custom interface for industrial RS485 networks without sourcing proprietary plugs.

Note: While the CAN lead uses a Weipu SP13 connector, many inverters and controllers require an RJ45 connection. A separate CAN Bus adapter cable (available from REC) may be needed to match your specific device pinout, as there is no universal standard for CAN RJ45 wiring.

Control and Monitoring Flexibility

The I/O connector brings out essential control and monitoring signals on a 1-metre cable. It includes a remote ON/OFF micro rocker switch, allowing convenient manual control of the BMS without accessing the unit directly. Additional labelled wires—OPTO RELAY IN, OPTO RELAY OUT, OC 1-, OC 1+, OC 2-, OC 2+—provide open-collector outputs and an opto-isolated relay interface for external alarms, contactors, or automation systems. This flexibility supports integration into larger energy management setups, from marine and RV applications to off-grid residential systems.

Built for Demanding Environments

All connectors are genuine TE Connectivity (AMP) parts, selected for their proven reliability in high-vibration and temperature-cycling conditions. The use of locking connectors prevents accidental disconnection, while the labelled wires reduce installation time and the potential for miswiring. This harness is suitable for use in mobile, marine, and stationary energy storage applications where dependable BMS operation is essential for battery safety and longevity.

Why Choose the REC 2Q Wiring Harness?

Using the correct wiring harness is a critical step in ensuring your REC 2Q BMS performs as designed. Generic or field-assembled cables often lack the proper connector housings, pin assignments, and wire gauges, leading to unreliable connections and potential damage to the BMS or battery cells. This harness is built to REC's specifications, providing a plug-and-play solution that protects your investment and reduces commissioning time.

By maintaining accurate cell voltage sensing, stable communication, and reliable temperature and current monitoring, this harness helps the BMS protect your lithium cells from over-voltage, under-voltage, over-temperature, and over-current conditions. It is an essential component for anyone serious about battery performance and safety.

Order Your REC 2Q BMS Wiring Harness Today

Equip your REC 2Q BMS with the connectivity it deserves. Whether you are building a new lithium battery system or maintaining an existing one, this wiring harness delivers the precision and reliability you need. Add to cart now and ensure your battery management system operates at its full potential.

Shipping Notes
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SKU: 19815615937

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The Reverend A.J. Miller
Belleville, US
★★★★★ 3
not impressed
Color: Brown (Bifold), Color: Brown (Bifold)
I own several articles of Carhartt clothing, most of which i got from a thrift store; it has been said that Carhartt meant quality--and quality meant high prices. When a Carhartt item became available through the Vine program, I was surprised, and decided that I would use this opportunity to pick up what I thought was going to be a good quality wallet. Nope. For what they ask for their stuff, you would assume that it was made with high quality materials and in the united states. this wallet misses the mark on both of those points. it is clearly stated on both the packaging and inside the wallet itself that it is made in india. the leather is thin and and may be so to effect the rapid aging and forming of the wallet around its contents, but it only has 3 card slots and a mesh-windowed ID card slot, so that seems like a stretch of an excuse. More likely, Carhartt cheaped out on materials. the stitching looks like it is made with plasticky thread , which may not hold up very long. but it IS embossed with the Carhartt logo, which is all some people need.
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Reviewed in the United States on March 26, 2026
B
Blue Mountains
Carnegie, US
★★★★★ 4
Rustic sturdy & simple leather wallet
Color: Brown (Bifold), Color: Brown (Bifold)
This Mens Full Grain Patina Leather Wallet has a rough, durable and rustic style with basic functionality and capacity as well as slim profile as in my pictures. I put about 10 dollar bills and a couple of my cards in this bifold wallet in my pictures. (You can put 3 cards in the card pockets on the right and 1 in the mesh pocket on the left.) It has a hard relatively smooth outer surface and a coarse surface on the other side. Over time of use, I would expect the leather to become tenderer. If you are looking for an affordable slim leather wallet with minimum functionality and capacity, this will be a good candidate. Thank you for letting me review this product.
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Reviewed in the United States on March 16, 2026
L
Leah M.
Carnegie, US
★★★★★ 5
Simple, Rugged Wallet with Classic Carhartt Style
Color: Black (Bifold), Color: Black (Bifold)
I ordered this Carhartt Patina Leather Bifold wallet and it is exactly what you would expect from the brand. It is simple, sturdy, and practical. The wallet comes packaged in a nice Carhartt box, which makes it feel like a quality item right out of the package and would make it easy to give as a gift. The leather has a smooth finish on the outside with clean stitching around the edges. It feels durable and like it will hold up well with everyday use. The interior has a more rugged, suede-like leather texture which gives it that classic workwear look Carhartt is known for. Inside there are three card pockets, a billfold pocket, and a clear ID window which makes it easy to access identification quickly. The layout is simple but functional and it keeps the wallet fairly slim so it should fit comfortably in a front or back pocket. Overall, this is a well made everyday wallet with a classic look. If you like Carhartt products and want something durable without a lot of extra bulk, this wallet is a solid option.
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Reviewed in the United States on March 14, 2026
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Verified Purchase
@photobrow
Lexington, US
★★★★★ 5
Compared to g-shock?
Color: Black/Yellow
Firstly random public reviews can be comical…”it’s has a battery, terrible, One star” or “I don’t like yellow, one star” omg peoples do better. I’ll review this while comparing to an older style of g-shock from the same era. I’ll start by saying this timex rocks, for me in my mid 50’s it’s so retro and nastalgic, brings back memories, I may have even owned this model back in the day. What’s great about it- the display, larger digits than the typical g-shock and they are super crisp, clear and easy to read. The indiglo is awesome. This is the most accurate quartz watch I have aside from the atomic g-shocks that adjust themselves daily. I prefer a chunky watch and the g-shocks do a better job in that department. i feel this watch is rugged, but I’d still give the nod to g-shock in this department. 200M water resistance is the gold standard and this watch has it which I love for peace of mind for any water based activities. This is a 5 star watch at a great price. I still love some aspects of a g-shock better but its just preference.
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Reviewed in the United States on February 11, 2026
T
Verified Purchase
Tanya
Massapequa, US
★★★★★ 5
Everybody loved the high-tech style and amazing functionality
Color: Black/Yellow
I'm not a Timex fanboy, and I've had my fair share of problems with the Expedition line, so this review is my honest opinion as a man who's worn Armitrons and Timexes since I was 10. I remember in 1992 when the Timex Ironman Triathlon with Indiglo was first launched - My older brother got one, then me and my neighbor friends. Everybody loved the high-tech style and amazing functionality. Even Bill Clinton was rock'n this watch, for those who don't remember. Quite simply, this is the perfect watch at a great price, in my opinion. Perfect as a gift for any man, and I think the original black/olive drab/yellow coloration is still the coolest. In this day and age of smartphones, it still pays to have this watch. The alarm is less annoying sounding than a cellphone, and doesn't wake up the entire house. To turn it off, just tap the watch, no more reaching for the phone or alarm clock. Timer comes in handy for anything; timing my kids' timeouts when they get in trouble, 15 minutes room clean-up times, etc. Chrono is fun for anything you wanna use a stop-watch for. I set the second time zone for Vietnam time. It really is a million times easier to use this watch for all of its functions than reaching for a smartphone or alarm clock, etc. If you;ve been relying on your phone for a few years as a watch/chronograph/timer/alarm - you'll be so glad you finally got a watch like this. I've never tried a smart-watch, however I feel those are not as necessary,durable or practical as a real watch. Other Timex watches I've used were freakin' trash - couldn't throw em away fast enough. Might as well open the box while holding it over a trash can, so the watch can fall right in when you open the box. That's my experience with the Expedition line-up. Back to this watch: The only thing I wish this watch could do is measure activity thermogenesis (calories expended throught the day) or work as a pedometer, which some smart-watches and other devices can do. I also cannott decide if I like this new, slightly larger, heavier/thicker design of the Ironman Triathlon over the 1990s design. The 90s models styling was "tight to death'. Star-split buttons were seperated. The mode button was yellow. Overall more compact and bi-cultural;by that I mean it looked great as an athletic watch or a politician, business man wathc. This new model is bigger, better ingress/shock resistance, and more of an athletic style over all, and is a little less colorful. I almost went with the G-shocks, but they still just look like crap and are waay to expensive. Sure, they have some better features, can survive WWIII, but I am a traveler. I need a watch that can work in the dark in any environment. The G-shocks are often using some kind of solar battery crap and rely on cathing a signal from an American automic clock in Colorado - good luck with that while your in Thailand on vacation.
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Reviewed in the United States on December 31, 2016

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