Discussion about rules are not always straight, because you can interpreted them sometimes different. see comments below: 1. If never paralleled than all is ok. As I mention I didn\'t read a...

Thanks Ben for your response. Ben wrote 1: from ISO TE13: \"NOTES: If batteries are paralleled in an unbalanced state, extremely high paralleling currents can flow. Ben I don\'t believe ...

comments to your questions. 1: from ISO TE13: \"\"NOTES: If batteries are paralleled in an unbalanced state, extremely high paralleling currents can flow. If used automatic paralleling devised o...

This diagram uses the red cable. Why the red cable? Can\'t we use the same shunt as the REC Active BMS which is closer to the battery and on the black cable?

Dear Ben, Thank you so much for your reply and the corrections and clarifications and the answers to my questions. I have been using DIYsolarForum.com  \"Small Boat BMS/LFP with Backup\" thre...

Another thing that not clear in you diagram, is where you install the voltage sense from the WS500. Think about that IF the REC is the \"system battery\" monitor in the Cerbo, you can not use SV...

Hello Rick Gleason, I only had a quick look to your diagram, I didnt check or all the details are correct!! To make a one contactor system you will safe costs. I think a two contactor syst...

Rick, Thanks, I had lots of help from some very knowledgeable guys,   @Goboatingnow @svsagres @wholybee and John Harries. I had several questions, I hope you might know or confirm the answers...

Some good stuff here.  Thanks for sharing!

Sure, the WS500 has a multiplier parameter, based on a 12V system to allow you to have any range of battery voltages, up to 48v.  The REC Q BMS also allows you to have between 5-16 cells.  The Vict...

@Rick-admin  we (4 sailors who have an interest in LFP and many who are EE or have electrical skills) have been working on a diagram and design for a small boat bms/lfp that uses REC Active BMS, Wa...

Is it possible to run a Victron/Wakespeed/REC Q system using a string of 9 (or even 10) LFP cells?   it would require that the MPPT,  Inverter/Charger, and alternator all be able to put ...

mine is my username at gmail .com If you want to send them over. I sent REC an email but still waiting, but would be nice to review the manual for any changes. Thanks!

You bet, and it seems pretty solid too. https://www.offgridsoftwaresolutions.com/ws500-user-forum/topic/rec-bms-wifi-firmware-update-1-6-now-released/

FYI .. 1.6.0 is out now ....

Yes, V2.8 comes with an updated manual. If you have an A-BMS, send me your e-mail some how, and I will send the files to you. Don\'t want to post my e-mail here in case I get flooded with req...

Quote from Trond Arvid Røsvik on September 27, 2022, 1:05 am Just want to add there is an huge improvement in the A-BMS V2.8 on how the charging is regulated. No more jumping up and down of the...

Hi AL. Yes I am running WS500 V2.5 and Venus OS V2.90 already.   That hardcoded overvoltage used to be 16.2V in 12V system. I know, as I have an client with 3.7V nominal cells, he ...

Trond Arvid, That is such great news to hear -- we can do only so much \'in the lab\' even with live test benches, to hear your comment from actual field install is really nice.  Thank you (I am...

Thanks Rick for making the video. This helps a lot. So it looks like that the sequence after the boot piep is normal and counts the number of found slave devices. You have two slaves, so it b...

This is the settings I am using. (4S 1000AH Winston). This gives \"Bulk/Absorption\" 14.2V and Float 13,5V, same as Victron recommendations.   \"cmin\":2.8,\"cmax\":3.8,\"tmax\":55,\"...

Just want to add there is an huge improvement in the A-BMS V2.8 on how the charging is regulated. No more jumping up and down of the current in last phase of charging.   Just be aware...

Thanks for the explanation. I\'ve reached out to them. Thank you!

This is what my demo unit looks like during startup.   The bright green LEDs at the end are the contactor enable relays.

BMS firmware is updated only rarely, and is serial# specific, therefore it can not be added to the site, but needs to be requested directly from REC head office.  You will need to send them your se...

@rick_tech_support Will BMS firmware updates be added to the site?

You beat me to it.  With the new integration of the WS500 it now needs to be connected on the VE port.  Previously we were recommending it be on the BMS port so that it was hardwired to talk direct...

Hello REC Community, I have a REC Master Slave config with one 9M Master Unit and three slaves. (Large Li-NMC 48S / 20kWh system). https://www.rec-bms.com/rec-bms-master-unit-9m/ Everything ...

Yes, there is an V2.8 out now. But I don\'t think you will find it online. Contact your local REC dealer.

Any firmware updates? I\'m getting my wifi adapter updated but was curious if there was any new firmware for the BMS. Its about a year old and wondered if there was anything new (don\'t see any fil...

Quote from Derek Dickson on September 23, 2022, 7:02 pm Did you figure this out? I had this problem as well and i needed to lower the balancing voltages. I did not, what did you lower the bala...

Sounds like a nice system Stefan.  The firmware is keyed to your Masters serial number, so that has to come from REC head office.  You will need to contact tine@rec-bms.com along with your Master s...

Hi, I have a Sungrow SH10RT inverter and purchased a Master Slave REC configuration. One Master and three Slaves for a 48S Li-NMC Configuration which is at the end 170-180 Volt for the high voltag...

Quote from Adam Sherman on June 7, 2022, 6:23 am Quote from Trond Arvid Røsvik on June 7, 2022, 2:17 am Yes, but did you activate DVCC like its described in the REC Manual? Does your victron...

Doh, answered my own question. It\'s right in the Wakespeed portion of the Cerbo manual https://www.victronenergy.com/media/pg/Cerbo_GX/en/wakespeed-ws500-support.html: 13.2. Requirements ...

Hey group, I plan on installing the REC-BMS in my camper van once it arrives but am curious regarding the use of the BMS-CAN port. I know that the REC and Wakespeed can be set to 500kbps so woul...

as I recall that just limits the field output.  Check out the BMS capacity rating setpoint from page 55 of the manual BMS Amp Cap: <WHOLE NUMBER ( 0  2500 ) > BMS Amperage Capacity (<B...

But changing the derate normal value would actually meter the output?  I\'m not sure I understand the amp cap parameter

The problem with capping the amps out of the reg is that you are not actually metering that value. but in your situation it may actually work in your favor as you are not trying to cap your output ...

Thanks Ben, I am pretty close to those settings; CPA I am using 420 minutes and 3A for exit A CPO and CPP all zeros CPF close with 13.5V Will test all this soon One more question: wh...