So I've been watching a lot of Youtube and following threads here lately, and figured it's about time that I threw up everything I've done so far.
I'd been thinking about building a project like this one, but wasn't quite sure about how to go about building such a system, until I found the HBPowerwall Youtube channel, so i'm kinda following in his footsteps and building the 14s80p powerwall.. I am wondering, however, if I should make it an even 100p pack, just for a little bit more capacity.
Anyways, onto the still-ongoing build.
To start off the project, I bought ten tp4056 chargers for charging and an Opus Bt-3100 capacity tester. I purchased 60 modem batteries online to see what it would take to make a full scale powerwall without buying all the batteries needed and then spending tons of time taking the packs apart.
Took these pictures cause it looked cool lol..
After tearing apart the pack, and sorting the batteries, the BMS circuit board, and the nickel metal, I sorted batteries per brand and type... or color lol.. Eventually, I'll recycle the nickel metal and the BMS circuit board unless somebody wants them for a project or something.. I have no need for them..
Anyways, after sorting them, I charged and then capacity tested each cell, and sorted them per mWh, and only keep cells above 1950 mWh. These batteries have almost all been above that magic number, however, and I'm fine with that.. and since I started the project, I've purchased almost enough to finish the system.. The slowest part of this build has either been only having purchased one Opus... orrr shrink-wrapping the cells white..and the Opusdied part way through the capacity test process, but still in warranty sooo I got it replaced.
Now you're updated to the present day, waiting on capacity tests to finish...
Eventually, I plan on purchasing either the Sigineer 3000w orthe Sigineer 6000w inverter, I haven't really decided for sure, and it all depends on how large scale this project ends up being, and how much of the house I end up running.
Ill pick up a Batrium BMS for balancing and all of the exciting management of batteries that happens haha..
I'd like to build this to be scalable, to add capacity once(if!) I find room for it.
Once I've got the system up and running, Ill add solar to make it a true off-grid system.
In total, this project will end up costing a little over $3000, and to build each additional 14s80p pack, if I keep spending ~$0.50/cell(yikes), it'll cost around $600-$650, not including more Batrium cell moniters. If I'm getting free batteries, that cost drops significantly, closer to $200/14s80p pack, again, without Batrium cell monitors. Once the project is nearing completion, I can share my cost breakdown Excel sheet, if people are interested
Also, I'd like to contest for youngest Powerwall builder, if thats allowed.. I'm currently a high school seinor, and building this as a project for a self-policed class. I'm an electrician by day, and from everything I've learned there, as well as other projects, I figured I was up to the task! So far, it's been a great learning experience and I don't regret anything so far.
I'd been thinking about building a project like this one, but wasn't quite sure about how to go about building such a system, until I found the HBPowerwall Youtube channel, so i'm kinda following in his footsteps and building the 14s80p powerwall.. I am wondering, however, if I should make it an even 100p pack, just for a little bit more capacity.
Anyways, onto the still-ongoing build.
To start off the project, I bought ten tp4056 chargers for charging and an Opus Bt-3100 capacity tester. I purchased 60 modem batteries online to see what it would take to make a full scale powerwall without buying all the batteries needed and then spending tons of time taking the packs apart.
Took these pictures cause it looked cool lol..
After tearing apart the pack, and sorting the batteries, the BMS circuit board, and the nickel metal, I sorted batteries per brand and type... or color lol.. Eventually, I'll recycle the nickel metal and the BMS circuit board unless somebody wants them for a project or something.. I have no need for them..
Anyways, after sorting them, I charged and then capacity tested each cell, and sorted them per mWh, and only keep cells above 1950 mWh. These batteries have almost all been above that magic number, however, and I'm fine with that.. and since I started the project, I've purchased almost enough to finish the system.. The slowest part of this build has either been only having purchased one Opus... orrr shrink-wrapping the cells white..and the Opusdied part way through the capacity test process, but still in warranty sooo I got it replaced.
Now you're updated to the present day, waiting on capacity tests to finish...
Eventually, I plan on purchasing either the Sigineer 3000w orthe Sigineer 6000w inverter, I haven't really decided for sure, and it all depends on how large scale this project ends up being, and how much of the house I end up running.
Ill pick up a Batrium BMS for balancing and all of the exciting management of batteries that happens haha..
I'd like to build this to be scalable, to add capacity once(if!) I find room for it.
Once I've got the system up and running, Ill add solar to make it a true off-grid system.
In total, this project will end up costing a little over $3000, and to build each additional 14s80p pack, if I keep spending ~$0.50/cell(yikes), it'll cost around $600-$650, not including more Batrium cell moniters. If I'm getting free batteries, that cost drops significantly, closer to $200/14s80p pack, again, without Batrium cell monitors. Once the project is nearing completion, I can share my cost breakdown Excel sheet, if people are interested
Also, I'd like to contest for youngest Powerwall builder, if thats allowed.. I'm currently a high school seinor, and building this as a project for a self-policed class. I'm an electrician by day, and from everything I've learned there, as well as other projects, I figured I was up to the task! So far, it's been a great learning experience and I don't regret anything so far.