alright guys I just want to do a quick update today got a couple questions I
went and bought a 3000 watt APC UPS very similar to what you see that average Joe
has and one of my concerns about this is how do I build the battery packs I'm
going to be building a power wall and I can do it several different ways most
people are doing cell packs like this where everything is in parallel and then
they put multiples in series well this is a 48 volt and so to do that I would
need a minimum of 13 of these if I was doing a 24 volt then I do seven of these
cell packs and I want to have the ability to add packs later and make it
bigger have more capacity but I don't want to have to do them in blocks of you
know 13 to 15 so I started thinking about doing packs like this that are
parallel and serial you can see they're running parallel and serial so this
within itself is a 48 volt battery and what I'm thinking I want to do is do
them like this because I could technically run this APC off of one cell
pack and then as I build out more I can just add them to the existing in a hot
swappable fashion so I would have multiples that I could just continue to
add to so my kilowatt hours would just continue to grow same voltage it's just
going to have more capacity so that's one of the things that I kind of wanted
to ask is why do people build packs like this and then have to add them you know
seven at a time or 14 a time or however many they are at a time to create the
voltage needed instead of doing like a 48 volt pack
so that's one of my questions I'm also looking at doing that with a replacement
for my portable solar generator if you haven't seen that video look right here
and it's it'll be in that video so I'm gonna replace the batteries in there and
I want to build out a 12-volt and this one here would make a well it's a little
more in 12 volt actually works out to 15 but if you look at the thresholds of
batteries this fits within the realm and this actually will run better with my
inverter so this pack here is one that I'm experimenting with to see how that
works in my portable power pack the other thing is is right now this one
here is an 8 P and it's 14 or 13 s currently so I have I have them running
in series and this would create a battery that actually runs about 50 55
volts off with actual numbers here on the screen so you can see it and my
concern is is the LED acid batteries I took out of the this APC they have a
peak in use voltage of fourteen point nine per hour and then dead is around 12
volts and so there's that wide range in so in order for me to match the lead
acid batteries that come out of here and not have to use a charge controller or
BMS on each of these packs what I could do I'm thinking is actually make this 15
instead of 13 which would run this up to 60 volts so this would be a 60 volt pack
and the threshold on this would then go up to about 59 and that's the peak
charging it would run on it and then drainage when it drains down it would
cut off at around 11 v between 11 5 and 12 volts and these can actually go down
a little bit lower so it's within the bandwidth it's within the range of what
these cells could take and I wouldn't be stressing them so I just want your
thoughts what do you think can you leave comments in the comments
below or visit my my site at the DIY engineer com
there's a comment section just leave comments there I just really want to
kind of get an idea of why wouldn't somebody want to do cell packs like this
so you can add them as capacity goes instead of having to do them in big
groupings of like this you know adding in multiples of these to be able to
achieve the voltage and the capacity that you're striving for so just some
thoughts on that if you can feed me a line this was just a quick update I
haven't done a lot of videos because it's been really busy it's the holiday
seasons and I'm just really busy with life and this is just a hobby so yeah
that's why you haven't seen a lot of videos from me but do please give me
some information on what you think about doing cell packs like this should I go
back to just doing them in large bricks or should I you know make my large
bricks into to actual full voltage battery packs so with that please leave
your comments below subscribe please share my videos tell me what you think
if I'm just being all crazy I need to know so anyways thanks for watching is a
pause for a minute I think this is Tess no 8p a PC it's an APC 3000 so I am
crazy I am I'm just crazy anybody who does this is crazy right
you net okay I hope the information I provided in this video was helpful if
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and I'll gladly get back to you thanks for watching