REC Master Slave Large Scale Systems | Off Grid and Marine Energy

REC Master Slave Large Scale Systems

For info on large scale parallel and high voltage series systems

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9M Master 2Q Slave Relays Usage of Relays and or Optocouplers - 9M Master with 3 * REC2Q Slaves - drive 6 contactors through 6 REC Pre-Charge Unit
5/25/25, 12:47 PM • Martin 5/25/25, 12:47 PM

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Martin
5/25/25, 12:47 PM

Use of Relays and Opto-Couplers in Master-Slave configuration: Dear community. I have written my...
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Master - Slave comunnication
4/14/25, 4:50 PM • Jiri 4/21/25, 5:41 AM

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Rick
4/21/25, 5:41 AM

Have you ried connecting directly to the slave with the Wifi Module?
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Dead REC Master - Dead/Burnt components close to Vcc input
10/20/24, 12:30 AM • Mike 10/20/24, 8:55 PM

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Mike
10/20/24, 8:55 PM

@Rick Thanks Rick. I cleaned it up with alcohol and it appears to be a circuit board fuse, ...
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Master BMS dead
4/18/24, 9:30 AM • Johan 4/18/24, 11:35 AM

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Rick
4/18/24, 11:35 AM

I can't ever rember a Master failing so we have never had one apart. Grab a Torx#10 a...
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What is the failure mode when a slave battery is unavailable?
11/7/23, 5:31 PM • Antoine 11/7/23, 7:36 PM

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Rick
11/7/23, 7:36 PM

in a parallel high current Master slave config, each slave controls and monitors its own pack and...
REC Q BMS REC newbie Setting up REC BMS + WakeSpeed 500 + Cerbo GX for marine use
10/18/23, 11:11 AM • Bill C. 10/18/23, 11:11 AM

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Bill C.
10/18/23, 11:11 AM

Hello All, I'm using CALB 230 cells in a custom marine application and am hoping that more exper...
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Victron newbie REC BMS with parallel connection batteries
10/16/23, 3:52 AM • Mihai 10/17/23, 6:08 PM

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Rick
10/17/23, 6:08 PM

Welcome to our User forum :) I have replied in blue below your questions: 1) Is there conter-re...
JR

REC Q BMS 2Q 2 x 24V banks in parallel
9/19/23, 10:02 AM • Jacopo Rufo 9/19/23, 2:51 PM

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Rick
9/19/23, 2:51 PM

and here are a few pics of what a Master/Slave system displays on a Victron Cerbo
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Operating temperature range for 9M slave modules
6/12/23, 3:00 PM • William 6/12/23, 3:00 PM

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William
6/12/23, 3:00 PM

I've got two battery banks each is a Nissan Leaf Gen1 repurposed battery. They been up and runnin...

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