PreppenWolf
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EG4 6500EX 120/240 Setup, 48V 105kWh Battery & Overkill 100A BMS Install
- Thread starter PreppenWolf
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PreppenWolf
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Banks without yellow labels haven't been top balanced. 3 down, 5 to go.
OffGridForGood
Catch, make or grow everything you can.
Very nice PW, Brings back memories of starting up my own system. Such exciting times when you can start moving real loads over to your own system.
Very cool to be able to start that 68A load, pretty high in-rush! is your motor 240V?
{I bit surprising for a 2Hp motor? if I read that correctly. Higher in-rush than my 6Hp air compressor}
I don't see where anyone asked, so I gotta know: where are these cells from? were they expensive? Can I buy 48 of them! LOL
Keep posting pics, looking good.
Then later we will start picking at what you are doing with G-N bonds and how close to the Voc your array is set, and what minimum temps you may see someday...but for now, great job!
Very cool to be able to start that 68A load, pretty high in-rush! is your motor 240V?
{I bit surprising for a 2Hp motor? if I read that correctly. Higher in-rush than my 6Hp air compressor}
I don't see where anyone asked, so I gotta know: where are these cells from? were they expensive? Can I buy 48 of them! LOL
Keep posting pics, looking good.
Then later we will start picking at what you are doing with G-N bonds and how close to the Voc your array is set, and what minimum temps you may see someday...but for now, great job!
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Adam De Lay
Solar Wizard
System really looks like it’s coming along from where you started! One of these days I hope to get to the point where I can have a system as large as yours (gonna need it living in MI).
Hoping my replacement inverters show up on time this weekend so I can get everything fired back up.
Keep up the great work!
Hoping my replacement inverters show up on time this weekend so I can get everything fired back up.
Keep up the great work!
PreppenWolf
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The Enco motor has wiring for 120 or 240V. I have it wired 120V because when we bought the house I didn't have 240V in the garage yet. Just never wired it back as I don't heavy hog on it. Just onsoe twosie jobber work.
On the batteries they are BYD cells used in Asian heavy truck and equipment markets like big forklifts and electric dump trucks. Still 3.2V LiFePO4. Just a different form factor. They are safer than equivalent EVE cells in puncture resistance and venting temps during failure due to the form factor. These cells are basically factory seconds that didn't make the cut to go into a vehicle. But they were $61 each, so the cost savings is very high. They are sold as 260Ah cells, but every cell I have is more than that. They range from 261 up to 283. Each came with a test sticker which matched my top balancing numbers pretty closely. They had all been produced 5 months before I received them. I bought them off Alibaba. Link to the seller below. They were very easy to deal with and communicated in less than 12hr from purchase through delivery. I have no association with this seller, but I would buy again from them in a heartbeat. 60 days from purchase to arrival at my house. I delt with Joyce Lee. The biggest pain was clearing/authorizing the payment with my credit card. US companies hate Alibaba.
On the batteries they are BYD cells used in Asian heavy truck and equipment markets like big forklifts and electric dump trucks. Still 3.2V LiFePO4. Just a different form factor. They are safer than equivalent EVE cells in puncture resistance and venting temps during failure due to the form factor. These cells are basically factory seconds that didn't make the cut to go into a vehicle. But they were $61 each, so the cost savings is very high. They are sold as 260Ah cells, but every cell I have is more than that. They range from 261 up to 283. Each came with a test sticker which matched my top balancing numbers pretty closely. They had all been produced 5 months before I received them. I bought them off Alibaba. Link to the seller below. They were very easy to deal with and communicated in less than 12hr from purchase through delivery. I have no association with this seller, but I would buy again from them in a heartbeat. 60 days from purchase to arrival at my house. I delt with Joyce Lee. The biggest pain was clearing/authorizing the payment with my credit card. US companies hate Alibaba.
OffGridForGood
Catch, make or grow everything you can.
okay that makes some sense now.
you can redo the motor winding set up for 240 and this will cut the in-rush in half to 34A. AND it will balance the load on your inverters since exactly the same amperage will be on each of L1 and L2 on start up. I did this with my set up and am very happy with the results. no difference to the motor output, no free lunch there.
Interesting about the batteries, and those bullet-proof looking cases (I am thinking about a mobile 'solar generator' or even my RV since some trips are on pretty rough logging roads). That price point for 260Ahr is very attractive. Thanks for sharing the source, I set up an Alibaba account for my business and it streamlined the transactions with the financial institutions it seems, and a bit better shipping rates. Thanks PW.
PreppenWolf
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I bought a 120V plug in soft start for it instead. I just got it this week. I'll post some pics of it this weekend.
OffGridForGood
Catch, make or grow everything you can.
Makes sense.
I got a quote from the battery supplier, for 8 cells to do a mobile unit that I can also use in my RV too, using a MPP 2724 (24vDC) system. Appreciated the contact info for the supplier, thanks!
PreppenWolf
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This is how the (128) batteries arrived. They were shipped discharged (2.5V per cell) FYI. 
PreppenWolf
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My array
Adam De Lay
Solar Wizard
Looks great!
PreppenWolf
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I'm going to build a little shed around the combiner box and underground power. It will have to wait until the ground thaws late spring. I just didn't have the time to do it before the frost set in with everything else that had to get done. I also commissioned my system sooner than I wanted due to a multi-day power outage after an ice storm. So now its a bit harder to modify because I have to plan 2/3 of the house down to power down the system to add items.
Adam De Lay
Solar Wizard
Yeah, it’s a whole lot more work when you have to rush to get things done.
OffGridForGood
Catch, make or grow everything you can.
I hear ya,
I put my array up on the shop south roof, built to be tiltable between 30 and 60 degrees, but like you, I got the system up and running at the lower angle (summer) and then life happened, and snow came. I have two tilting arrays and I only got the second array lifts completed and tilted up after christmas (ops).
To me, you shouldn't worry about the time-lines too much, you are doing it yourself, and if it takes longer so be it. 99% of the world are still behind where you are on the jouney to site produced electricity, and everything you do has learning potential.
I put my array up on the shop south roof, built to be tiltable between 30 and 60 degrees, but like you, I got the system up and running at the lower angle (summer) and then life happened, and snow came. I have two tilting arrays and I only got the second array lifts completed and tilted up after christmas (ops).
To me, you shouldn't worry about the time-lines too much, you are doing it yourself, and if it takes longer so be it. 99% of the world are still behind where you are on the jouney to site produced electricity, and everything you do has learning potential.
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PreppenWolf
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Adding a note the solar panel frames are made from ground contact pressure treated lumber. My intent is to move the system from NH to KY once we buy a farm. The frames fold up so I can transport them all in a box truck.
Adam De Lay
Solar Wizard
Thanks for sharing. I was wondering what the additional hinges were for.
PreppenWolf
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Here is my panel setup. The center panel is grid. The left panel is offgrid loads. I have not finished moving everything yet. Some non-essential items will stay on the grid like our electric dryer and electric stove.
I had to shrink the resolution of the panoram pic for it to post.
I had to shrink the resolution of the panoram pic for it to post.
Zwy
Emperor Of Solar
Did you determine the cause of current on EGC?
NEpowerandlight
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What are the 2 black boxes between the busbars and the inverters? T class fuse?
PreppenWolf
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Yes T Class. I'm adding a switch below each soon to ease maintenance. I currently just toggle each BMS forcing the inverters to AC bypass. Then disconnect. Not ideal but I didn't have everything when I commissioned during the power outage.
If you zoom in you can see I even had their outline penciled on the concrete board before I started installing everything.
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