REC-BMS Programming and Configuration Questions

Post your techincal questions here

12 Topics 1 Followers

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WiFi FW REC WIFI Unable to install WiFi Module SW 1.6.3
7/5/25, 9:49 PM • Jakub 7/6/25, 6:28 PM

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38
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Jakub
7/6/25, 6:28 PM

Loading the files directly onto the SD card did the job - thanks.
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

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3
Posts

104
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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

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13
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152
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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

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134
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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

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46
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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

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105
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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

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50
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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

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207
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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

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60
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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

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115
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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

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968
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rickv
11/23/21, 7:45 AM

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

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2
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1.5k
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Richard
2/9/21, 6:59 AM

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

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REC-BMS Programming and Configuration Questions

WiFi FW REC WIFI Unable to install WiFi Module SW 1.6.3 7/5/25, 9:49 PM • Jakub 7/6/25, 6:28 PM

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

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Latest topics

REC ABMS - integration with heltec 4s Active Balancer

WS500 Field Stuck High

Two (related) issues after updating to 2.9.6 firmware

Unable to install WiFi Module SW 1.6.3

TimeToGo additional message for Victron D-BUS

Latest posts

ABMS lilliputian switch

Troubleshooting Unstable ABMS-WiFi Connectivity on Boat

REC ABMS - integration with heltec 4s Active Balancer

REC ABMS - integration with heltec 4s Active Balancer

Two (related) issues after updating to 2.9.6 firmware

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WiFi FW REC WIFI Unable to install WiFi Module SW 1.6.3
7/5/25, 9:49 PM • Jakub 7/6/25, 6:28 PM

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