REC-BMS Programming and Configuration Questions

Post your techincal questions here

11 Topics 1 Followers

alternator, solar charging system REC Q BMS Victron What charging precedence strategy are you using with your REC-BMS-controlled-Victron-Energy-LiFePO4 marine system?
2/4/25, 2:56 PM • Bill C. 4/28/25, 2:28 AM

3

3
Posts

93
Views

Bill C.
4/28/25, 2:28 AM

@Richard Thanks! I am reviewing the video. Great suggestion.
REC Q BMS settings Master Looking for feedback on my QBMS configuration and settings.
10/22/24, 4:51 PM • Bill C. 12/29/24, 3:20 AM

13

13
Posts

145
Views

Bill C.
12/29/24, 3:20 AM

Can someone explain how the passive balancing alogrithm works on the the REC Q BMS. When you reac...
P

REC BMS for 24-series LTO cells for Sunny Island
1/14/24, 2:05 PM • PeterD 10/24/24, 1:05 PM

10

10
Posts

129
Views

P

PeterD
10/24/24, 1:05 PM

Thanks Rick. HTTP calls will work great for me.
M

Where can I buy an RS485 cable?
10/21/24, 7:00 PM • Mike 10/21/24, 9:07 PM

3

3
Posts

44
Views

M

Mike
10/21/24, 9:07 PM

@Rick Thanks. Got it.
J

Master Slave Config PC BMS Control Software
9/29/24, 2:21 PM • Jack 10/1/24, 12:37 AM

9

9
Posts

83
Views

J

Jack
10/1/24, 12:37 AM

Yes, it is a high-voltage system. Nevertheless, it should be possible to reach the two slaves. So...
J

Wifi module and LCD screen connected
5/12/24, 4:36 PM • Johan 5/12/24, 6:28 PM

2

2
Posts

46
Views

R

Rick
5/12/24, 6:28 PM

Yes, the WiFi module supports both connection to the BMS as well as the older LCD screen
Sunny Island SMA grid export SMA Sunny Island Grid Export
4/16/24, 7:33 PM • Trevor Higher Wire 5/7/24, 6:07 PM

7

7
Posts

174
Views

Trevor Higher Wire
5/7/24, 6:07 PM

Hey Fred, yes we set it to Li-bmx-ext. I erased and reflashed the update.bin file on the master a...
D

Winter Question: Toronto
10/20/23, 11:44 AM • David 10/20/23, 11:44 AM

1

1
Posts

60
Views

D

David
10/20/23, 11:44 AM

My question has to do with the temp here (Toronto), and how to best manage my batteries: ov...
S

REC- BMS DB9 signal waveforms / +5v (pin 6) GND (pin 2) / random system shutdown w/ reboot
6/10/23, 10:19 AM • Scott 6/10/23, 10:19 AM

1

1
Posts

113
Views

S

Scott
6/10/23, 10:19 AM

Good Day, This implementation of RS485 appears to be unique in that +VCC / GND is required. Furt...
r

Combining two Battery Banks
11/23/21, 7:16 AM • rickv 11/23/21, 7:45 AM

3

3
Posts

963
Views

r

rickv
11/23/21, 7:45 AM

Great! Thanks!
R

YDSC-04 Switch Control
2/8/21, 2:09 PM • Richard 2/9/21, 6:59 AM

2

2
Posts

1.5k
Views

R

Richard
2/9/21, 6:59 AM

Feedback from Korolev Alexey, support engineer, Yacht Devices Ltd I am int...

REC-BMS Programming and Configuration Questions

alternator, solar charging system REC Q BMS Victron What charging precedence strategy are you using with your REC-BMS-controlled-Victron-Energy-LiFePO4 marine system? 2/4/25, 2:56 PM • Bill C. 4/28/25, 2:28 AM

REC Q BMS settings Master Looking for feedback on my QBMS configuration and settings. 10/22/24, 4:51 PM • Bill C. 12/29/24, 3:20 AM

REC BMS for 24-series LTO cells for Sunny Island 1/14/24, 2:05 PM • PeterD 10/24/24, 1:05 PM

Where can I buy an RS485 cable? 10/21/24, 7:00 PM • Mike 10/21/24, 9:07 PM

Master Slave Config PC BMS Control Software 9/29/24, 2:21 PM • Jack 10/1/24, 12:37 AM

Wifi module and LCD screen connected 5/12/24, 4:36 PM • Johan 5/12/24, 6:28 PM

Sunny Island SMA grid export SMA Sunny Island Grid Export 4/16/24, 7:33 PM • Trevor Higher Wire 5/7/24, 6:07 PM

Winter Question: Toronto 10/20/23, 11:44 AM • David 10/20/23, 11:44 AM

REC- BMS DB9 signal waveforms / +5v (pin 6) GND (pin 2) / random system shutdown w/ reboot 6/10/23, 10:19 AM • Scott 6/10/23, 10:19 AM

Combining two Battery Banks 11/23/21, 7:16 AM • rickv 11/23/21, 7:45 AM

YDSC-04 Switch Control 2/8/21, 2:09 PM • Richard 2/9/21, 6:59 AM

Search

Latest topics

VRM Remote - "Remote Charging = NO" always when using WS-500 running fw 2.6.1 - but still charges ok

Victron BMV Settings

Charging Rates

Usage of Relays and or Optocouplers - 9M Master with 3 * REC2Q Slaves - drive 6 contactors through 6 REC Pre-Charge Unit

REC WiFi module locked up, how to fix

Latest posts

Charging Rates

VRM Remote - "Remote Charging = NO" always when using WS-500 running fw 2.6.1 - but still charges ok

Charging Rates

VRM Remote - "Remote Charging = NO" always when using WS-500 running fw 2.6.1 - but still charges ok

Charging Rates

Forum statistics

Newest members

Mathias

Darin

Steve

Jiri

Chris

Most liked authors

Richard

Rick

Trond

Bill C.

Trond

Ben

PeterD

tine

Al

Bill

alternator, solar charging system REC Q BMS Victron What charging precedence strategy are you using with your REC-BMS-controlled-Victron-Energy-LiFePO4 marine system?
2/4/25, 2:56 PM • Bill C. 4/28/25, 2:28 AM

REC Q BMS settings Master Looking for feedback on my QBMS configuration and settings.
10/22/24, 4:51 PM • Bill C. 12/29/24, 3:20 AM

REC BMS for 24-series LTO cells for Sunny Island
1/14/24, 2:05 PM • PeterD 10/24/24, 1:05 PM

Where can I buy an RS485 cable?
10/21/24, 7:00 PM • Mike 10/21/24, 9:07 PM

Master Slave Config PC BMS Control Software
9/29/24, 2:21 PM • Jack 10/1/24, 12:37 AM

Wifi module and LCD screen connected
5/12/24, 4:36 PM • Johan 5/12/24, 6:28 PM

Sunny Island SMA grid export SMA Sunny Island Grid Export
4/16/24, 7:33 PM • Trevor Higher Wire 5/7/24, 6:07 PM

Winter Question: Toronto
10/20/23, 11:44 AM • David 10/20/23, 11:44 AM

REC- BMS DB9 signal waveforms / +5v (pin 6) GND (pin 2) / random system shutdown w/ reboot
6/10/23, 10:19 AM • Scott 6/10/23, 10:19 AM

Combining two Battery Banks
11/23/21, 7:16 AM • rickv 11/23/21, 7:45 AM

YDSC-04 Switch Control
2/8/21, 2:09 PM • Richard 2/9/21, 6:59 AM