Most reacted posts

Hey mate, I'm pretty sure that's normal behaviour for the voltage to settle that amount :)

Awesome, thanks. I might grab one of these. They seem like a bit of a safer option than the really cheap power supplies, especially as I'm dealing with a decent sized battery. I'd like to play it as safe as possible. I'd love to get more into electronics so I'm sure it'll come in handy...

Maybe I should just put both the Bulk and float at the same voltage then? I might put both on 28.2v and see how we go

Hey guys, I bought 16 200ah CALB cells about 7 months ago. The seller assured me they were Top balanced before shipped. If they were Top balanced, will I need to perform another balance when I assemble the pack? I probably won't assemble for another 2-3 months, so it could be 10-12 months since...

So I'm unsure of the best way to go about this with a larger pack, I've watched the video. 1. Top balance cells in 16p configuration 2. Arrange the 48v pack in 16s with 150a BMS with low voltage cut off. 3. Attach a battery monitor to the battery to record battery Wh consumed etc. 4. Hook up...

Okay thanks. The cells were at 3.4v when received. They are now 3.2v. I suppose I'll give them a go and if they are way out from each other I'll have to perform a top balance. Would rather not if it can be helped though.

Sorry I was wrong! They came to me at 3.34v and are flicking between 3.29 and 3.30v. My DVM only goes two decimal places so I will need to get a more accurate one. Is there a clamp meter that does accurate voltage readings as well as current readings? Would be great If I could get just the one...

Hi guys. I just recently built my 2p8s 400ah 24v battery bank, I built it without doing an initial top balance because I wanted to see how it went before forking out the money for a power supply. All the cells were at 3.31-3.32v before assembling. Everything looked okay and the BMS read all...

Okay cool, have purchased a power supply so will get onto it. Do you think that could account for the large cell drift when a load is placed on the battery?

Yes been meaning to do this, especially as I'm made some bus bars and I didn't give them as good a polish up as I could have. In saying that though, if I read the cell voltages directly on the battery terminals (under the bus bars), the cell readings still drift quite a bit. Does that mean it's...

Will do, hopefully this fixes the issue :)

Thanks for that! I see what your saying about testing each individual cell. I think though, testing it as a 48v pack will be more practical in my scenario. Testing each individual cell sounds like a pain and very time consuming. I'm still in two minds on the best way to go about top balancing...

Hi guys, Ive begun mounting my solar panels to my car port roof. I'm a little unsure about grounding the system. I'm fastening the panels with L brackets, secured directly onto the metal roofing. My question is, isn't that basically grounding my system to the metal roof and thus the steel...

Hi guys, I have a 24v lifepo4 pack (8s 400ah). I'm charging with a MPP solar 3024gk and am confused about the charge settings. I've set the Bulk charge (C.V) to 28.8v and the float to 27.0v. I have no loads on the batteries as I'm just trying to get them to 100% so I can do a capacity test...

Ah bummer. I suppose I should invest in both types. Cheers :) Okay thanks, hopefully the cells are okay quality. They are definitely not "brand new" as they were advertised unfortunately. I'm hoping to get the pack assembled within the next couple of months, so I'll keep a close eye on them in...

https://www.ebay.com/itm/312636020408

Yeah that's fair. I might contact support and ask them if they know what the issue is. I just manually switched the float to 27.2v once it reached 28.2v. All the cells are reading 3.4v now, so they are basically fully charged. I don't want to be manually switching voltages for obvious reasons...

Hey guys, I'm a little confused on the best way to go about capacity testing some lithium cells. I've purchased 16 200ah lithium cells with the intention of creating a 48v pack for an off grid shack. What is the easiest and most cost effective way of capacity testing this battery pack? Thanks.

Yes I did. The only relevant settings are Bulk, Float and Equalisation (which I have disabled)..