This is great! Thanks for sharing.

I finally got around to documenting my config and testing which may be of use to other.  For background my system is a 560HA 24V LFP built from EVE 280 cells with a REC-Q BMS.  The Wakespeed is con...

From Tine at REC BMS Head office: 1.0 was only beta, not upgradable by(to) 1.2 and 2.0. 1.2 and 2.0 can be upgraded. (2.0)HW has a bit different layout and external LEDs. () are my notes

From Tine at REC BMS head office: It is programmed as a charge control, but we can custom re-program it for a small fee of 25€.

Packs that comes out off balance is mainly cheaper cells. I dont see this with Winston cells for example. I think balancing below 3.5V has negative side effects.  

This is an interesting topic and there are some good points here. After more than 10 years experience with various LFP cells, like Ben I have found that trying to maintain an LFP pack at a parti...

There are different ways to do. A easy way is in a GX product, under DVCC, set MAX voltage to 13.1V or 13.2V. Negative side effect: If you do this for a long time,  batteries can become sl...

Rich and Rick, How best to \"store\" our house bank of LiFePo4 managed by a REC Active BMS has been an ongoing concern for us since installing the system 2 years ago. Our system includes a Victr...

Nice, thank you. I will contact them when closer to doing my install.

Head office confirmed that the Sunny CANbus cable is the same pinout as the Growatt inverter

I have setup multiply REC Q BMS 24V system with one discharge relay and one charge relay. REC can supply you from a firmware that the opto output controls the Charge relay. The relay output con...

We are indeed looking at current stability, esp with CAN based instrumentation and BMS \'moving targets\' in a rather quick fashion (Blue line in your graph).  Most BMS\'s assume quick responding M...

Yes, it\'s not clear but that image is from the wire side, not the pin side of that connector.

I connected my BMS cell voltage wires according to the labels on the wires, but when I check the voltages on the plug, the negative is on the left top of the plug, instead of the right top in the m...

Maybe REC can help with this one. @tine    

There is another thread similar to this one where they want to use the SI-Q BMS opto output for discharge limit disable of loads, in this case to isolate the Cerbo and only have it disabled on a lo...

My experience is that this was much better in Wakespeed V2.4.3. Then in V2.5_Beta it got worse again. Confirmend by going back to V2.4.3 so I belive Wakespeed are on to something..   ...

Does anyone know the difference between HW 1.0, 1,2 and 2.0?

Hi! Wondering if there have been any updates on this. Thank you!

Hi Fred, From what I could find the Growatt uses the same pinout as the SMA cable but I have a msg into head office just to confirm.

Hi Rick,   Are any off the shelf (from offgrid) communication cables available for the Growatt inverters?   Thanksm

I\'d love to see Victron have a main page update that will show a charge source from the WS500. However my guess is to get an accurate reading, you\'ll still need to install a shunt on the wire fro...

Any details on the new command that was added?

Hey Adam, If your opto output is not being used you should be able to add a small interposing relay and set it as a low voltage cutout for these loads.   By default it is set to disable non-smar...

Oh, I also want to do this, but I have a system with a REC Q BMS already in service. Can that be setup to do it as well? I guess the REC WiFi module would also fit into this.

Got the drawing.  Nice work! I like your idea of using the the second relay as your interlock to power your mission critical low power loads like the Cerbo direct from the battery pack.  By defa...

Hi Rick - thanks for your reply.  Sorry, e-mail is steve@imlcontracting.ca. I\'ll send system schematic shortly

REC has now released its latest software update for the REC BMS WiFi module.  There are versions for both the 1.2 and 2.0 boards so check the \"Firmware\" page before downloading. The files are ...

Hey Steve, Your email kicks back as not found but you can send me your wiring diagram here. Its an interesting design consideration, tech@offgridsoftwaresolutions.com Rick

REC has informed us a new REC BMS Firmware will be sent to us this next week for testing.  We (Wakespeed) will be looking at this behavior as well as other noted issues around REC.   The...

Hi Rick - thanks for your response.  I\'m running things the way you describe right now.  The \'parasitic\' load from the BMS/CERBO GX and relays is only 500mA or 6W so the 160W solar array is keep...

Has this been resolved?   I am experiencing this behaviour with my Rec Active integrated with my WS500.  Updated to the newest (non beta) firmware and I am still seeing the issue.  Makes me wonder ...

Hi Ben,  my setup is actually similar to Max’s.  I have a Rec Active BMS controlling the alternator via CAN bus.  When the charge gets to about 98% the tach starts bouncing, as does the charge curr...

Hi Ben, Thanks for your answer. I\'m not trying yet the $SCT test, I\'ll do in a couple of days. >you said: \"If your tacho stops, your batteries are probably full, there fore the alternator ...

I share salvey’s befuddlement with the lack of female receptacles for the male connector screws on the RS485 connectors.  Not only is the BMS relatively expensive, so to are all the additional modu...

I replace the REC on/off switch and extend the cable a few times. Also use another type off switch. The REC on/off switch is a NC type!!  

hello Massimiliano, If your tacho stops, your batteries are probably full, there fore the alternator stop charging, because this is the best for the batterer. See my explanation above. In most...

If you turn off most of your loads at the DC distribution panel, a few hundred watts of solar should allow you leave your DC electrical system \"in service\" while you are away.  The only loads in ...

I\'ve just built a power system for a 45\' sloop: 12V @ 560AH LFP battery; REC Active BMS Balmar XT250A alternator controlled by WS500 CAN regulator Victron Multiplus II inverter charger...

Hi Rick - I noticed the same issue when I received my BMS and cables.  I connected them together with two zip-ties; a cheezy but effective solution.   Question:  why do the cables not co...