Quattrohead
Solar Wizard
34 Envision 304 B cells and 2 EEL battery boxes on their way ?
Just over $4000 for 30kwh of battery, $0.13 per kwh
Just over $4000 for 30kwh of battery, $0.13 per kwh
Who is still building DIY batteries
- Thread starter JJJJ
- Start date
How much were the eel battery boxes and where did you purchase from? Thanks34 Envision 304 B cells and 2 EEL battery boxes on their way ?
Just over $4000 for 30kwh of battery, $0.13 per kwh
DIY for me. Cost is one aspect, flexibility for my needs and serviceability another. It's also a lot more fun than off-the-shelf.
I'm at around 60kWh now, but since I'm also adding more panels, there is an itch to expand to 100kWh or so.
I'm at around 60kWh now, but since I'm also adding more panels, there is an itch to expand to 100kWh or so.
Bossrox
Solar tinkerer
I'll always be building DIY banks. It's just far cheaper going that route as long as I can depend on access to a quality supply of cells. With the rack mounts, they're real nice looking but say a bms goes out, even if it's in warranty, you gotta likely do a complicated teardown to replace it where your DIY would likely take a couple minutes & most of us have spares ready to swap out.
MrM1
I'm Here, But I'm Not All There
timselectric
If I can do it, you can do it.
- Joined
- Feb 5, 2022
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- 20,095
Anything I damn well please. lol
MrM1
I'm Here, But I'm Not All There
MrM1
I'm Here, But I'm Not All There
WindWizard
Solar Enthusiast
My battery pack is 128 LFP 280AH 48 volt system. It is self-balancing and keeps the cells within 10mv. I have 2 Overkill BMS 's and also two 5 amp balance boards. I balance just the top end of the Cells. The balance boards turn on at 54.2 volts to keep the Cells all good. Everything on the System is totally automatic and I do not have to babysit it. The System runs the entire house including a hot tub and 3 refrigerators a pool pump and 4 freezers. It runs the house for 3 days without solar. No electric bill.
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timselectric
If I can do it, you can do it.
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Yup
300kwh is the plan.
EastTexCowboy
Solar Wizard
That looks like the corner of a Titanium MIG rig peeking out on the right. I've been thinking about picking up one of the 170s for some projects around the ranch instead of my Miller Bobcat stick welder. How to you like it?
Rednecktek
Solar Wizard
It's the 125 flux core wire feed and you can pry it from my cold dead hands...
PreppenWolf
Solar Wizard
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- Oct 10, 2022
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- 941
You have to do it on Alibaba. I know it sucks and believe me I wasn't super excited to spend $12k the last time. I ordered mine from Joyce Lee at Keheng New Energy. She was very responsive and clearly I got my order without issues. It was a 45 days I believe from order to arrival. If you check my build thread I believe I posted the time frame and pics of crates.
If you want the newer full blades just search for BYD blades or BYD batteries. They will pop up.
RV10flyer
Solar Wizard
- Joined
- Mar 8, 2021
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- 1,198
Ask for James or leave a message.
OffGridForGood
Catch, make or grow everything you can.
Quattrohead
Solar Wizard
I did get through to someone and ended up placing an order, everyone's fault for talking about cheap grade b cells LOL The shipping is weird though, was not offered FedEx for 16 cells but I was for 17 so as I wanted a couple of spares anyway I ordered two batches of 17.
superchachi
New Member
I would get a 15' torch. I have been using a 140A Everlast wire feed outside for 5 years now. With nice flux core wire it is really convenient if a bit messy at times.
superchachi
New Member
Also, how many batteries are ok to buy before you have a solar system?
wopachop
New Member
Seeing people talk about JK BMS it appears they are all 20-100v.
What would you guys build if doing an RV? Went to the 18650 website yesterday and lots of batteries are 30% off. Does that mean there is a chance the sale batteries have been on the shelf awhile? Or is there always a sale going? Fun to read about the different vendors and plan ahead.
What would you guys build if doing an RV? Went to the 18650 website yesterday and lots of batteries are 30% off. Does that mean there is a chance the sale batteries have been on the shelf awhile? Or is there always a sale going? Fun to read about the different vendors and plan ahead.
I went with 16 CALB 302ah batteries and the JK BMS. For the inverter I went with the Samlex EVO 4248. I can have the TV, air conditioning, on and pull the plug and never even know shore power is missing. Next comes Solar.
There is a 4s 12V JK as well. Or use an Overkill/JBD.
All of them ?
OffGridInTheCity
Solar Wizard
I started my DIY Powerwall 6 years ago based on 2nd hand 18650 NMC chemistry cells. The current generation of LifePo4 / rack batteries / pricing wasn't so easily available back then.
It's been cost effective and since I do it in the background, a battery (or 2) / year, and enjoy the process - it's easy background work and is OK for my situation.
I'm up to 121kwh and 1,780 cycles as of yesterday on the oldest battery with no detectable degradation.
and working on 27kwh more ....
It's been cost effective and since I do it in the background, a battery (or 2) / year, and enjoy the process - it's easy background work and is OK for my situation.
I'm up to 121kwh and 1,780 cycles as of yesterday on the oldest battery with no detectable degradation.
and working on 27kwh more ....
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