REC Q Series BMS

Q Series for large, high voltage and redundant systems

31 Topics 2 Followers

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Q series BMS Error 15
1/18/25, 8:29 PM • Anthoney 1/19/25, 10:13 AM

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Rick
1/19/25, 10:13 AM

Hey Tony, the big change is that the 2Q uses better connectors, has more memory, a real-time cloc...
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Setting Date and Time
1/9/23, 11:53 AM • nworker 1/4/25, 8:36 PM

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4
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141
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Bill C.
1/4/25, 8:36 PM

@nworker becasue there is no real time clock (RTC) on the Q Series, my graphs simply show an incr...
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2Q REC Master REC Master BMS/2Q Max System Size
10/8/24, 10:27 PM • Austin 10/16/24, 1:08 PM

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Rick
10/16/24, 1:08 PM

Here is some feedback from REC engineering that may address your challenge while giving you a lev...
System Error #3
8/23/24, 10:02 AM • Robert 8/27/24, 11:55 AM

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40
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Robert
8/27/24, 11:55 AM

@Rick Thanks for your recomendations, that works. Take a look at my logging is this fairly normal...
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2Q firmware update (what happens to settings)
8/6/24, 11:13 AM • Jeffrey 8/9/24, 6:21 PM

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4
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63
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Jeffrey
8/9/24, 6:21 PM

FYI -- the CHRG setting (CAN protocol) gets reset on firmware update and that was the reason I lo...
REC Q BMS settings Setting REC Discharge and Charge Current Limits. Need help.
6/12/24, 5:45 PM • Bill C. 7/22/24, 11:01 AM

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4
Posts

123
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Bill C.
7/22/24, 11:01 AM

30 days of data. Does anyone have an idea why my CCL and CVL values are moving around when chargi...
REC-BMS logging basics help
5/17/24, 10:41 PM • Bill C. 5/17/24, 10:41 PM

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1
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47
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Bill C.
5/17/24, 10:41 PM

I was hoping that someone could explain how the REC-BMS logging screen works on the WiFi module. ...
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Warning: Internal Failure
5/16/22, 10:35 AM • Adam 5/14/24, 3:06 AM

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1.8k
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tine
5/14/24, 3:06 AM

Rick and other users gave me thinking about how to change this sound buzzer alarm not to drive th...
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Silencing the audible alarm
11/24/22, 8:23 AM • edclarke 4/17/24, 4:44 PM

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380
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Rick
4/17/24, 4:44 PM

We're happy to help if we can. Please send your serial # to support@ogm-energy.com and we w...
REC Q BMS balancing ? re seeing when the balancing is active using the wifi home page
12/21/23, 3:20 PM • Bill C. 12/21/23, 3:20 PM

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35
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Bill C.
12/21/23, 3:20 PM

Hello All, I have just fired up my REC Q BMS and am accessing it via the WiFi module. I am...
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Seeing a "PROBLEM WITH SD CARD, LOGGING IS DISABLED" message
10/9/23, 5:04 PM • Eran 11/25/23, 6:46 PM

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121
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Eran
11/25/23, 6:46 PM

Thank you, I apprecaite that! Good luck!
J

Victron 2Q REC REC 2Q BMS and Victron
8/22/23, 10:44 AM • Jeremy 8/22/23, 10:44 AM

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1
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132
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Jeremy
8/22/23, 10:44 AM

This is for anyone else who may have trouble getting the new 2Q to communicate with Victron. ...
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REC Q Series BMS + WS500 + Victron + charge/discharge control
5/3/23, 9:16 PM • Thomas 6/11/23, 11:53 AM

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6
Posts

142
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Rick
6/11/23, 11:53 AM

The Cerbo does not provide battery settings functionality for the BMS. You can set up alarm...
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REC BMS Voltage Setting for clean 100% SOC charge end.
5/4/23, 4:28 AM • Stefan 5/5/23, 6:09 AM

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4
Posts

145
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Stefan
5/5/23, 6:09 AM

It looks like in my case, the max pack voltage went over the calculated value by about 1 Volt at ...
S

REC Master 9M - Startup Pieps - CAN Problem
9/26/22, 12:44 AM • Stefan 4/25/23, 12:26 PM

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6
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354
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Rick
4/25/23, 12:26 PM

This is great information. Thanks for sharing!
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Rec BMS charge and discharge disable
6/24/22, 9:48 AM • Robin 3/16/23, 11:26 PM

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22
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2.6k
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Ben
3/16/23, 11:26 PM

Quote from bonsys on March 16, 2023, 12:19 pm I have a general observation to share. After ins...
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Shunt reading 2.5x lower than actual current
1/22/23, 2:49 PM • Peter 1/22/23, 2:53 PM

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2
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114
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Peter
1/22/23, 2:53 PM

here is a screenshot from the VRM console showing the difference in the current readings.
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Minimal connections to safely communicate w/BMS
1/9/23, 8:12 AM • skrap 1/14/23, 4:19 AM

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197
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skrap
1/14/23, 4:19 AM

Rick, I have the official REC cable. Will the BMS power on and be responsive if the only conn...
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Can REC Q BMS communicate to Victron Lynx Distributor?
5/18/21, 8:40 PM • fpat99 11/29/22, 12:53 PM

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1.4k
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Jon
11/29/22, 12:53 PM

The Lynx Distributor uses an I2C bus to relay the 4 fuses and positive busbar state. Up to 4 dist...
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Maximum Cell Float Voltage Coefficient
10/22/22, 8:26 AM • John 10/23/22, 4:04 AM

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254
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Richard
10/23/22, 4:04 AM

The Q series has firmware that is keyed to the serial number, so you just need to send in your re...
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Charging Questions SunnyIsland 5048U
10/19/22, 2:30 PM • nworker 10/19/22, 2:30 PM

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228
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nworker
10/19/22, 2:30 PM

With the WiFi module (1.6) and the REC-BMS (2.8) configured, I have a couple of questions My u...
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REC BMS supported inverters
6/23/22, 6:17 AM • Richard 10/17/22, 3:59 PM

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1.2k
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Richard
10/17/22, 3:59 PM

Here is the DB9 pinout from the BMS. Just grab a DB9 connector, a 120 ohm resistor and a phone p...
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REC Q BMS firmware
4/4/22, 3:03 PM • David 4/6/22, 1:43 PM

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1.4k
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Richard
4/6/22, 1:43 PM

Hi David, the first one is just the software release info. The latest firmware revision is ind...
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Connecting REC Q BMS to Sunny Island 6048-US Inverter
3/7/22, 6:54 AM • David 4/2/22, 7:37 AM

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6.1k
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David
4/2/22, 7:37 AM

I know what to do now and that makes sense. I will rewire it like you suggested. Thanks!
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Wrong voltage measurement on most positive cell
1/21/22, 1:34 AM • Marius 1/21/22, 8:47 AM

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839
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Richard
1/21/22, 8:47 AM

Just realized, the Active BMS has fuses that are user replaceable but the Q series does not.
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REC Q Series vs. Victron specific BMS
11/8/21, 8:10 AM • edclarke 1/17/22, 7:23 AM

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1.6k
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Richard
1/17/22, 7:23 AM

On the network diagram please note that Terminators are NOT required on the VE.bus network. Up...
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Day 2, BMS Temperature Faults
12/3/21, 10:20 AM • Adam 12/3/21, 11:21 AM

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Adam
12/3/21, 11:21 AM

Quote from Rick-admin on December 3, 2021, 3:56 pm Give it a few days to try to get itself bal...
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Can Bus connection to SI-6048
11/16/21, 1:24 PM • bob 11/25/21, 12:39 AM

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1.9k
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Richard
11/25/21, 12:39 AM

Bob, I was able to replicate your error but only by using small letters then pressing \"Enter\...
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REC Q incorrect (high) Voltage sense on most positive cell (Cell 8)
4/12/21, 9:58 AM • Nathaniel 9/28/21, 7:17 AM

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1.5k
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Richard
9/28/21, 7:17 AM

Just a note to all. The resistor test battery simulator described above will work with the Q Ser...
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How does the REC BMS interface with a Sunny Inverter?
1/24/21, 7:25 AM • Richard 1/24/21, 7:28 AM

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2.1k
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Richard
1/24/21, 7:28 AM

Basically the BMS passes several parameters back to the Inverter via CANBus which allow the 2 uni...
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REC Q BMS Startup problems
10/21/20, 8:28 AM • Richard 10/21/20, 8:39 AM

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1.9k
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Richard
10/21/20, 8:39 AM

Hi, Good news on progress! Tks for the feedback. I have attached an overall screen-shot of...

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REC Q Series BMS

Q series BMS Error 15 1/18/25, 8:29 PM • Anthoney 1/19/25, 10:13 AM

Setting Date and Time 1/9/23, 11:53 AM • nworker 1/4/25, 8:36 PM

2Q REC Master REC Master BMS/2Q Max System Size 10/8/24, 10:27 PM • Austin 10/16/24, 1:08 PM

System Error #3 8/23/24, 10:02 AM • Robert 8/27/24, 11:55 AM

2Q firmware update (what happens to settings) 8/6/24, 11:13 AM • Jeffrey 8/9/24, 6:21 PM

REC Q BMS settings Setting REC Discharge and Charge Current Limits. Need help. 6/12/24, 5:45 PM • Bill C. 7/22/24, 11:01 AM

REC-BMS logging basics help 5/17/24, 10:41 PM • Bill C. 5/17/24, 10:41 PM

Warning: Internal Failure 5/16/22, 10:35 AM • Adam 5/14/24, 3:06 AM

Silencing the audible alarm 11/24/22, 8:23 AM • edclarke 4/17/24, 4:44 PM

REC Q BMS balancing ? re seeing when the balancing is active using the wifi home page 12/21/23, 3:20 PM • Bill C. 12/21/23, 3:20 PM

Seeing a "PROBLEM WITH SD CARD, LOGGING IS DISABLED" message 10/9/23, 5:04 PM • Eran 11/25/23, 6:46 PM

Victron 2Q REC REC 2Q BMS and Victron 8/22/23, 10:44 AM • Jeremy 8/22/23, 10:44 AM

REC Q Series BMS + WS500 + Victron + charge/discharge control 5/3/23, 9:16 PM • Thomas 6/11/23, 11:53 AM

REC BMS Voltage Setting for clean 100% SOC charge end. 5/4/23, 4:28 AM • Stefan 5/5/23, 6:09 AM

REC Master 9M - Startup Pieps - CAN Problem 9/26/22, 12:44 AM • Stefan 4/25/23, 12:26 PM

Rec BMS charge and discharge disable 6/24/22, 9:48 AM • Robin 3/16/23, 11:26 PM

Shunt reading 2.5x lower than actual current 1/22/23, 2:49 PM • Peter 1/22/23, 2:53 PM

Minimal connections to safely communicate w/BMS 1/9/23, 8:12 AM • skrap 1/14/23, 4:19 AM

Can REC Q BMS communicate to Victron Lynx Distributor? 5/18/21, 8:40 PM • fpat99 11/29/22, 12:53 PM

Maximum Cell Float Voltage Coefficient 10/22/22, 8:26 AM • John 10/23/22, 4:04 AM

Charging Questions SunnyIsland 5048U 10/19/22, 2:30 PM • nworker 10/19/22, 2:30 PM

REC BMS supported inverters 6/23/22, 6:17 AM • Richard 10/17/22, 3:59 PM

REC Q BMS firmware 4/4/22, 3:03 PM • David 4/6/22, 1:43 PM

Connecting REC Q BMS to Sunny Island 6048-US Inverter 3/7/22, 6:54 AM • David 4/2/22, 7:37 AM

Wrong voltage measurement on most positive cell 1/21/22, 1:34 AM • Marius 1/21/22, 8:47 AM

REC Q Series vs. Victron specific BMS 11/8/21, 8:10 AM • edclarke 1/17/22, 7:23 AM

Day 2, BMS Temperature Faults 12/3/21, 10:20 AM • Adam 12/3/21, 11:21 AM

Can Bus connection to SI-6048 11/16/21, 1:24 PM • bob 11/25/21, 12:39 AM

REC Q incorrect (high) Voltage sense on most positive cell (Cell 8) 4/12/21, 9:58 AM • Nathaniel 9/28/21, 7:17 AM

How does the REC BMS interface with a Sunny Inverter? 1/24/21, 7:25 AM • Richard 1/24/21, 7:28 AM

REC Q BMS Startup problems 10/21/20, 8:28 AM • Richard 10/21/20, 8:39 AM

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Latest topics

Q series BMS Error 15

Precharge with Tyco relays

New REC BMS and Victron Cerbo DVCC integration Guide

Accessing REC WiFi module on my boat with Starlink

WS500 data display on Raymarine Axiom (marine use)

Latest posts

Q series BMS Error 15

Q series BMS Error 15

Q series BMS Error 15

Q series BMS Error 15

Precharge with Tyco relays

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Q series BMS Error 15
1/18/25, 8:29 PM • Anthoney 1/19/25, 10:13 AM

Setting Date and Time
1/9/23, 11:53 AM • nworker 1/4/25, 8:36 PM

2Q REC Master REC Master BMS/2Q Max System Size
10/8/24, 10:27 PM • Austin 10/16/24, 1:08 PM

System Error #3
8/23/24, 10:02 AM • Robert 8/27/24, 11:55 AM

2Q firmware update (what happens to settings)
8/6/24, 11:13 AM • Jeffrey 8/9/24, 6:21 PM

REC Q BMS settings Setting REC Discharge and Charge Current Limits. Need help.
6/12/24, 5:45 PM • Bill C. 7/22/24, 11:01 AM

REC-BMS logging basics help
5/17/24, 10:41 PM • Bill C. 5/17/24, 10:41 PM

Warning: Internal Failure
5/16/22, 10:35 AM • Adam 5/14/24, 3:06 AM

Silencing the audible alarm
11/24/22, 8:23 AM • edclarke 4/17/24, 4:44 PM

REC Q BMS balancing ? re seeing when the balancing is active using the wifi home page
12/21/23, 3:20 PM • Bill C. 12/21/23, 3:20 PM

Seeing a "PROBLEM WITH SD CARD, LOGGING IS DISABLED" message
10/9/23, 5:04 PM • Eran 11/25/23, 6:46 PM

Victron 2Q REC REC 2Q BMS and Victron
8/22/23, 10:44 AM • Jeremy 8/22/23, 10:44 AM

REC Q Series BMS + WS500 + Victron + charge/discharge control
5/3/23, 9:16 PM • Thomas 6/11/23, 11:53 AM

REC BMS Voltage Setting for clean 100% SOC charge end.
5/4/23, 4:28 AM • Stefan 5/5/23, 6:09 AM

REC Master 9M - Startup Pieps - CAN Problem
9/26/22, 12:44 AM • Stefan 4/25/23, 12:26 PM

Rec BMS charge and discharge disable
6/24/22, 9:48 AM • Robin 3/16/23, 11:26 PM

Shunt reading 2.5x lower than actual current
1/22/23, 2:49 PM • Peter 1/22/23, 2:53 PM

Minimal connections to safely communicate w/BMS
1/9/23, 8:12 AM • skrap 1/14/23, 4:19 AM

Can REC Q BMS communicate to Victron Lynx Distributor?
5/18/21, 8:40 PM • fpat99 11/29/22, 12:53 PM

Maximum Cell Float Voltage Coefficient
10/22/22, 8:26 AM • John 10/23/22, 4:04 AM

Charging Questions SunnyIsland 5048U
10/19/22, 2:30 PM • nworker 10/19/22, 2:30 PM

REC BMS supported inverters
6/23/22, 6:17 AM • Richard 10/17/22, 3:59 PM

REC Q BMS firmware
4/4/22, 3:03 PM • David 4/6/22, 1:43 PM

Connecting REC Q BMS to Sunny Island 6048-US Inverter
3/7/22, 6:54 AM • David 4/2/22, 7:37 AM

Wrong voltage measurement on most positive cell
1/21/22, 1:34 AM • Marius 1/21/22, 8:47 AM

REC Q Series vs. Victron specific BMS
11/8/21, 8:10 AM • edclarke 1/17/22, 7:23 AM

Day 2, BMS Temperature Faults
12/3/21, 10:20 AM • Adam 12/3/21, 11:21 AM

Can Bus connection to SI-6048
11/16/21, 1:24 PM • bob 11/25/21, 12:39 AM

REC Q incorrect (high) Voltage sense on most positive cell (Cell 8)
4/12/21, 9:58 AM • Nathaniel 9/28/21, 7:17 AM

How does the REC BMS interface with a Sunny Inverter?
1/24/21, 7:25 AM • Richard 1/24/21, 7:28 AM

REC Q BMS Startup problems
10/21/20, 8:28 AM • Richard 10/21/20, 8:39 AM