Thanks! I have watched that one about 10 times (seriously). The still shot of the video I think is enough, but I just want to make sure I understand. I am basically duplicating the picture above on both sides of the pack and to the same bus bars on each pack? So a wire into each top bus bar of each cell going to the same bus bar/cell on the 2nd pack?David has a great video on how to do that.
Yes, that's basically the idea. You want to parallel connect the cells with the same voltage together. Do make sure the cell voltages from both batteries are similar before bundling them together so you don't get fireworks unintentionally.Thanks! I have watched that one about 10 times (seriously). The still shot of the video I think is enough, but I just want to make sure I understand. I am basically duplicating the picture above on both sides of the pack and to the same bus bars on each pack? So a wire into each top bus bar of each cell going to the same bus bar/cell on the 2nd pack?
I plan to use a similar wire/fuse, but I am with a connector so I can separate them for maintenance if needed.
Off to watch that one again.
Don't get your hopes up, expect about 160ah usable.Does anyone have pictures of paralleling the individual cells for two units? I watched several videos, but I am still not 100% clear on the process. I have two units coming that I would like to parallel to get what I am hoping will be about 24v 200AH total storage (anything more would be gravy).
Yes, that's basically the idea. You want to parallel connect the cells with the same voltage together. Do make sure the cell voltages from both batteries are similar before bundling them together so you don't get fireworks unintentionally.
Don't get your hopes up, expect about 160ah usable.
600 watts? That's not much. But you don't have the "correct units".Right now I have the lofty goal of pulling about 600 watts a day for exterior lighting from this setup.
Well, and not electrocute myself or fall off the roof, but these are not deal breakers...
Mine were...on that ship.The time matches...
I just sent the link to the seller and asked if he could find out which ship was used.
Ughhhhh
600 watts?
Lol, ok then.sorry, 35w load for 14 hours. Basically c5 7 watt lightbulbs outside
I will definitely follow your advice on charging. I plan to wire both packs up for a cell monitor. I know from reading all the different threads that this isn’t the best storage solution out there, but for the price ($850 delivered) and coming from the USA instead of on a boat from China I was good with it. Having so many videos and threads on the subject is awesome!Lol, ok then.
Each battery pack will be able to power your lights for about a week. 2 packs, about 12 days.
I paralleled the two together for 12 hours (settled at 24.6v) and then charged them up to 26.7v (took all day at 20a from the LV2424 AC in). Let them sit for a day and they are at 26.6v. I don't have the solar panels installed yet so I really don't want to capacity test them until I can recharge from the sun. It is snowing today (in Central Texas) so I can't even hook up my test panel.When you get your packs, charge them, to say 26.8V then just let them sit a day, so you can see where they self-discharge to. This is the same as me charging mine to 53.6V. After a year of use I understand now that that is just a pipe dream and not to even try to get them there, they are perfectly fine charging to 53.1V.
53.1V/26.5 is about 75% SOC.
Wow, not much discharge. Sounds like a good set.I paralleled the two together for 12 hours (settled at 24.6v) and then charged them up to 26.7v (took all day at 20a from the LV2424 AC in). Let them sit for a day and they are at 26.6v. I don't have the solar panels installed yet so I really don't want to capacity test them until I can recharge from the sun. It is snowing today (in Central Texas) so I can't even hook up my test panel.
I was just emailed by bigbattery in June 2021 saying they credited my account in full for 2 of the BYD's I bought back in Feb 2020, plus shipping. Unfortunately, I have not seen a credit on my account and keep getting stone walled by BB accounting dept.I have five of them in parallel in a stand-by system, so they don't get cycled very often. They have not degraded much in the time that I've had them. Get an honest 650 Ah (130Ah each) out of this from a 40A discharge from 26.6v to 24.4v. They settle to 26.6v after a charge to 28.0 with a 15A exit. My 'usual' range is 26.6v to 25.2, which is roughly 80% of the SOC range.
My Bulk Charge voltage is set at 28.0v to prevent a a couple of cells from climbing past 3.6 well before the others. As long as I enter Absorption there, the cells seem to behave. My low end voltage is gated by one cell that dives off of a cliff before the rest. I could take the time to weed out the bad cells or patch them with augmented cells, but I really don't care that much....
I use an SBMS0 as a BMS which looks after the climbers and the jumpers.
I use a Samlex Evo 2224 to manage the stand-by aspects. Part two of this project is to integrate my SCC and power my Home Office from the sun as much as possible. I built this for fun and education, I don't rely on it or need it.
I am happy with the purchase. I did get a substantial refund from the seller to make up for erroneous capacity claims which makes this a decent value in my book.