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Hi; I was quoted for critter guard on my solar rooftop install and I was wondering if this is a real problem that I need to solve? I haven't read the specific warranty but I figured enough people are on the forum to have real life experiences. thanks !

Hi: My 24S pack is top balanced and assembled. The BMS does not have good instructions (I've watched videos and looked at numerous pdfs and I'm still not sure about a few things). I have two questions: What is a string? I am thinking I have one string but can't verify that with the...

Matt- do you have instruction manuals for these BMS? I need one. thanks

loose wires. all set now

Hi: I top balanced by 24 LiFeP04 cells to 3.5v a few months ago, built my pack and connected the DeliGreen BMS for the first time. I have some questions about what the BMS is indicating, and I don't know if it will sort itself out or if I will have to do something. Here goes (with pictures!)...

thanks. Those were the first kind I considered but they are not DC rated so I didnt want to risk using them. I need to use something like this instead: Bussmann PV-2a.

HI: I need a 2 amp fuse for a 72 volt system. Any suggestions as to where I could get such a fuse? It's for a non-solar application. thanks!

That is an impressive setup. Did you consider using Noalox or any other type of antioxidant compound on the busbars? thanks

Thanks for this info. I also read the top balancer tutorial. The question I have and the tutorial doesn't answer is can I actually start with 3.25 v cells and get them up to 3.65 without making a 12v DIY battery and buying a BMS to add to it? I don't have a need for a 4 cell BMS so I'd prefer...

I’m top balancing my 24s pack using my new Longwei DC power supply and my amperage number jumps around and doesn’t drop. All the cells were at 3.2 before I started. Could this be a charger issue? It’s new and I haven’t used it before. Also, can I use a Battery Tender (I use these to charge up...

these are just a bit too short. Any suggestions? A few of the monitoring wires are short too but I have a solution for those. thanks

I'm revisiting this because I saw a variable voltage DC charger on Amazon that will do up to 120 volts, which should theoretically meet my need to charge my 24S 78ah LiFePo4 pack. No ratings on it though. Can you take a look at it and let me know if you think I can use it for top balancing...

thanks. I haven't ordered the BMS yet. Do you have any suggestions?

got it thanks

The batteries are new, from a reputable seller, and I tested the voltage on each cell and found them to be 3.25 with one at 3.26 and a few at 3.24. Since I'm new to this I think I understand what you are saying except for the part of "load disconnected". How would I do that if the interconnects...

Hi: Here's an example of the type of charger I was referring to (excuse the long amazon link:)...

Thanks! Cells are not together yet so I have a lot of flexibility. Once the pack is assembled I will charge it with an onboard 72v charger (I haven't selected that yet, or the BMS). So you are recommending charging each one to 3.6 or 3.65 with one of the Variable DC power supplies you can pick...

I'm building a 72v system for a vehicle application. I watched the videos and digested the wiki (which is great). I have a 30v charger that can do 8 cells in series. the LiFePo4 cells are new and are all at 3.25 right now. Rather than buy a 72v charger that I will probably never use again...

Building a battery pack I’m ready to build my battery pack (24s 78ah LiFePo4 for a 72 volt system for an EV) and have a couple of safety-related questions before I started. I’ve read Micah Toll’s book on how to build batteries and also watched many videos on YouTube, but I want to verify a few...

I'm building a 72v iLifePo4 pack using 24 78ah cells. The batteries can do a constant 2C discharge rate. Do my busbars need to accommodate 78amps of current or 156 (2x78). I saw on Overkill Solar that had busbars that would accommodate 100ah batteries with a 2c discharge rate but were pretty...

Hi: I'm building a 24s LiFePo4 pack using 78ah cells. the attachment points on the batteries are 3/4" in diameter. I calculate that I need 3/16" thick stock, but when i look on battery hookup they say that their busbars, which are 1/8" thick and thinner than 3/4 support 100 amps. Can someone...

Hi: I'm new to the forum and think it is fantastic! I signed up because it is a great place to learn about battery building. My application is actually a small EV, and I was planning on putting 24 78ah cells in series but in a 4x6 configuration because that is what fits. Someone told me that...