Hello everyone!
Sorry if this has been asked a thousand times before. I've been searching online and the forums and couldn't find my question or missed it.
I have 16 brand new 280ah cells. When they arrived they were all 3.29v to 3.3v. I charged two sets of 8 in parallel that I will be making 24v packs out of to 3.65v. After days of charging, my packs were finally at 3.65v and I let them sit in parallel overnight.
Now for my question. Do cells normally drop voltage with no load or anything connected? In the parallel, they dropped to 3.61v over night. I charged them back to 3.65v and then disconnected them from each other. They were all 3.65v and I let them sit separated over night. This morning, each cell is around 3.58v. Is it normal for them to drop this way?
My main concern is the Overkill Solar BMS's I ordered say specifically to charge each cell and top balance them at 3.65v before putting them in a series to 24v and setting up the BMS. They drop that 3.65 fairly quickly it seems. Do I need to keep charging them and letting them sit overnight until they hold the 3.65v or should I just go ahead and hook up the BMS? I want to take good care of these and have them last. So, I want to do it as right as possible. Any help is always appreciated. Thanks!
Sorry if this has been asked a thousand times before. I've been searching online and the forums and couldn't find my question or missed it.
I have 16 brand new 280ah cells. When they arrived they were all 3.29v to 3.3v. I charged two sets of 8 in parallel that I will be making 24v packs out of to 3.65v. After days of charging, my packs were finally at 3.65v and I let them sit in parallel overnight.
Now for my question. Do cells normally drop voltage with no load or anything connected? In the parallel, they dropped to 3.61v over night. I charged them back to 3.65v and then disconnected them from each other. They were all 3.65v and I let them sit separated over night. This morning, each cell is around 3.58v. Is it normal for them to drop this way?
My main concern is the Overkill Solar BMS's I ordered say specifically to charge each cell and top balance them at 3.65v before putting them in a series to 24v and setting up the BMS. They drop that 3.65 fairly quickly it seems. Do I need to keep charging them and letting them sit overnight until they hold the 3.65v or should I just go ahead and hook up the BMS? I want to take good care of these and have them last. So, I want to do it as right as possible. Any help is always appreciated. Thanks!