Recent content by Ssybert

Hi All, Thank you all for the great feedback. Originally I did NOT opt for the pre-charge module. The datasheet for these contactors even at high inrush current showed very good life expectancy, even more so at lower voltages like 28vdc. I assumed it was an opportunity to up-sell an...

Hi everyone. Strange issue I'm having, I have a 1200AH 24v LiFePo4 battery bank connected to four Victron Miltiplus 24/3000/70 charger/inverters. I'm using a REC BMS and a TE Kilovac 500a contactor. After charging the bank at around 250a for 3.5hrs I discovered the contactor would not close...

Are you talking about the crowbar circuit? This was my first suspicion based on the theory of operation in the manual but the components didn't look like they were current carrying such to be able to handle a dead short. The crowbar circuit seems to manage the driver circuits It would seem...

Hi Everyone, I have an older variable voltage / variable current HP power supply I was using to top balance some batteries. With the power supply off, I was removing the leads and dropped one to the chassis of my RV while the other was still attached. a 1200AH LiFePo4 pack drew current through...

It's too bad. They have such a great foundation... the device is built right to displace heat and not just burn up prematurely, it has native Victron integration, they have a WiFi module, remote display panel... They've obviously put some time and money into this product, just get it over the...

I'm going to share a portion of an email I sent to REC yesterday in hopes they will add a few features to the product. These suggestions, in my opinion, are simple to implement and will set them apart from any other BMS. This would be game changing and would be welcomed with incredible demand...

Hi All, sorry for the late reply... I didn't get alerted there were replies. I did opt to use DVCC but what I don't like is REC puts my Multiplus in to Absorbtion once it hits charge voltage and holds the batteries there. This is madness. Why would ANYONE want to hold their LiFePo4 pack at...

Pyrofx and others, thank you for your support. This was the confirmation I was looking for before I sent +24v into any of these pins. I configured my contactor to be powered from pin 2 while applying my constant +24 to pin 1 and it looks to be working correctly. For anyone else running in to...

I'm sorry guys, let me clarify a bit. I did NOT buy a pre-charge relay. Looking at the install documents, the per-charge relay is activated via pins 1 & 2 on the IO terminal strip. An image in the manual identify pins 1 & 2 as "relay pins". The description further down details these pins as...

Hi all, I asked this question in another thread as part of a larger issue but think it may be best to be a separate topic as I cannot be the only person with this question. I have a REC Q BMS which I opted not to buy the pre-charge relay for. There is no documentation on how to wire the...

Hi All, I'm hoping there are some REC guru's who can help. My configuration is a REC Q BMS connected via CANBus to a Cerbo GX which is connected to a Victron MultiPlus 24/3000/70-120 via VE.bus. Everything is configed per REC specifications, as best I can tell. What I'm observing is when the...