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Hello I am building a 4 separate DIY LFP battery system. I will be using 4 "Non Victron" BMS modules for each battery. I have a Cerbo unit for numerous monitor and control functions. I have the BMS (REC BMS) units configured as a VE-CAN bus for input to the Cerbo. The Cerbo device only has 2...

Agreed on the above suggestions. Unfortunately we came back to the states in Dec 2019 from our boat in Panama and had a major life change surprise. For the last year plus I have been getting treated for stage 4 cancer. My cancer is now in remission and we hope to return to our boat late June or...

Hello, I wanted to take an informal survey for those who have LFP systems on their boat. What is the size of your boat and what is your daily energy consumption (either aH per 24 hours, please indicate your battery voltage or kWH per day)? Also a couple other comments if you know: consumption...

Thanks Shinebox, I’m up and running now. But a possible follow up question. I’m not sure how to set the parameters for relay 1 or possibly relay 2 based on the REC SOC levels? I suppose I could set up relay 1 for generator on/off and use relay 1 for the BMS SOC that way but I’d like to use that...

Sorry for the multiple pictures. I'm not sure how to delete all but one. If anyone knows how to do so, please advise. Thank you for your responses. I will try your suggestion Shinebox. BTW, In the REC manual, I didnt see anyreference to Cerbo. I am not too IT savvy so it may be there and just...

Hello, I have recently added a Victron Cerbo device to my test bench LiFePo4 battery set up. I have a 4S REC BMS with a CAN Bus connector. Is there anyone who can help me get meaningful info from the BMS to the Cerbo (such as SOC or Cell voltages) so I can use the info? One of my issues that I...

REC

I'd be interested in seeing a comparison. I have an REC that I am experimenting with. I like it a lot for many reasons, but I'd like to see Will's input on others.

I agree there is a lot to like about the REC BMS, but I'm still in the learning mode. The other fact is that I am experimenting with a small capacity battery charging it fully and discharging it down to the low part on the knee. Thanks for your input.

Hello, I am experimenting with a small 4S DIY battery system. I currently have a REC BMS that has a number of features that I like, the one I’m not too pleased with is how the REC SOC compares with my Victron BMV 712 SOC. Some of this may be because I am experimenting with a small 20 aH battery...

Hello I am still learning about the 4S REC BMS. My question this time is related to the SOC. I question the accuracy of the process used to determine the SOC. For instance, I charge my small 20 AH 4S pack to about 3.65volts per cell (I must say I am very impressed as to how well the BMS...

Thank you Codfish, I am starting to convert to Victron units. I love the flexibility of the settings and Bluetooth

Hello, I hope some one can help. I’m still trying to get answers via offgrid software solutions forum ( not many users). I have a REC 4S BMS. I am using the REC software and the Vbat meter has a full scale max reading of 34v. For a 4S BMS, I would expect the full scale reading to be about 18...

Thanks for your suggestion. We already have LA batteries on all loads. I am wanting to get better performance by making the house batteries LFP. The high loads on the LA taxes the batteries more than they would compared to LFP.

Yes, high loads are windlass, bow thruster, microwave, kitchen items like blender, etc. most of the time 5 mins or less of demand. Some of those pull 200 plus amps out of the 12 volt house bank. The current house bank are 4 sets of Trojan GC batteries. They are physically located as 1 set...

Thanks Filter Guy. I am still learning and building the small set has helped me learn a lot. Another question.... if the BMS is the second layer of protection, does it make sense to buy an “expensive” BMS when in fact it may never even be cycled? I unfortunately need to make 4 sets of 4S...

I am experimenting with a small 20 aH LFP 12 volt system. My BMS is a Daly 60 amp “non-smart” unit with preprogrammed protection settings for LVC and HVC. I have been using a Victron BMV 712 smart battery monitor to set the battery protection using the built in relay and the SOC parameters of...

Has anyone had LiFePo4 cells shipped to other international locations? We have a sailboat in Panama and it looks like shipping the cells from the U.S. has multiple problems. Has anyone here shipped cells to Panama or other locations? Please Sumerian the experience. Thank you

As I research about making the conversion from FLA batteries to LFP for our 49 ft monohull, I see many schematics of a separate charge bus and a load bus. I think it could be quite a job to rewire the boat to set it up as such. I’m not sure as we are locked down in the states and our boat is in...

Sorry let me clarify a few things.... Currently the house battery physical locations are, one location forward to supply power for the windlass, bow thruster, 12v watermaker. The bow thruster and windlass will probably require peak currents of maybe 250 amps each (None will be used at the same...

Hi, I tried this on the Marine section with little response, so I will try it here again. Thanks for any help. Hello, for a few reasons we are in the states and our boat is in Panama. I fear our lead acid Trojan CG batteries will be toast when we return in perhaps June 2021. I want to upgrade...

The distances are already established in the boat. One battery forward to supply the bow thruster and windlass, two batteries in the main salon and one battery in the aft cabin. They are all 8 D battery boxes

Hello, for a few reasons we are in the states and our boat is in Panama. I fear our lead acid Trojan CG batteries will be toast when we return in perhaps June 2021. I want to upgrade the boat to LiFePo4 when we return. I have a few questions concerning the conversion. The boat is a 49 ft...