diy solar

diy solar

Server Rack Batteries fit Golf Carts

Delmar

Delmar

Solar Addict
Joined
Dec 9, 2019
Messages
942
Location
Lake Conroe Texas
Purchased a barely-used SOK 5.1kwh battery from a member of this forum for my Yamaha AC-drive golf cart. After removing the FLA batteries [toughest part of the swap due to corroded bolts] and removing a couple of brackets there was the perfect space for the server rack case.

Made some temporary wiring connections and took the cart out for a long test drive. The 100A max discharge limit did not cause a BMS shutdown, however I was careful not to go full throttle from stopped. Pleasantly surprised the ride quality improved with the ~300lb weight reduction. Was expecting to have a stiff buckboard. I guess the springs are progressive so am now using the softer portion.

Anyone need a deal on some used Trojan T-875’s with Hydrolink watering?
 

Attachments

  • SOK battery.jpg
    SOK battery.jpg
    173.3 KB · Views: 33
Last edited:
Nice. I actually went with 48V, same size as Trojan batteries in my unit. My unit, however is a 1 ton 4x4 SXS, so I needed 8. I have seen 500 AMP draw on mine. But with my config, max constant draw allowed is 640, so all good. Best $ I've spent on my SXS, for sure. Increased my range from less than 10 to more than 50 miles per charge.
 
millsan1 said:
Nice. I actually went with 48V, same size as Trojan batteries in my unit. My unit, however is a 1 ton 4x4 SXS, so I needed 8. I have seen 500 AMP draw on mine. But with my config, max constant draw allowed is 640, so all good. Best $ I've spent on my SXS, for sure. Increased my range from less than 10 to more than 50 miles per charge.
Click to expand...
umm i think i speak for everyone when i say we want pics!?!?! iv wanted to build an electric sxs for a while now! i have a very large forklift motor (11 inch diameter drive motor)
 
several youtube videos with people using batteries like that, all of which had to go 200 amp max discharge to go up hills etc. The 100amp work as long as you're on flat and not gunning it
 
millsan1 said:
I wish I was cool enough to have built it, LOL.

Here is the unit
intimidatorutv.com

Classic EV | Intimidator UTV

intimidatorutv.com intimidatorutv.com

Here are the batteries I used, https://bigbattery.com/products/48v-eagle-lifepo4-30ah-1-53kwh/, but they've been replaced with a newer version.
Click to expand...
it only goes 10 miles normally??? thats terrible lol i just assumed you built it with it having limited range.. iv built a lot of interesting toys. usually it starts with a wrecked jap bike motor and i throw it on a go cart or a 4wheeler or a small buggy. but always wanted to make an electric one and then use the battery as emergency backup if i run low on power so i dont have to start the generator
 
MidwestBest said:
it only goes 10 miles normally??? thats terrible lol i just assumed you built it with it having limited range.. iv built a lot of interesting toys. usually it starts with a wrecked jap bike motor and i throw it on a go cart or a 4wheeler or a small buggy. but always wanted to make an electric one and then use the battery as emergency backup if i run low on power so i dont have to start the generator
Click to expand...
Yes, in my hilly terrain. Flatlands, maybe 20. Was a big PITA TBH, but once I put the lithium batteries in it, it has become the perfect vehicle for me for working on the property and hunting.

You mean like this?

diysolarforum.com

EV SXS to run house

Hello everyone. Newbie here. Some background on my project: I have an electric side by side. Intimidator EV Classic. https://intimidatorutv.com/classic-ev/ It comes with 8, 6V Lead Acid batteries. I am replacing those with 8, 48V Eagle batteries from Bigbattery.com...
diysolarforum.com diysolarforum.com

I can use the SXS as an emergency battery and run the house for a few extra hours.
 
millsan1 said:
Yes, in my hilly terrain. Flatlands, maybe 20. Was a big PITA TBH, but once I put the lithium batteries in it, it has become the perfect vehicle for me for working on the property and hunting.

You mean like this?

diysolarforum.com

EV SXS to run house

Hello everyone. Newbie here. Some background on my project: I have an electric side by side. Intimidator EV Classic. https://intimidatorutv.com/classic-ev/ It comes with 8, 6V Lead Acid batteries. I am replacing those with 8, 48V Eagle batteries from Bigbattery.com...
diysolarforum.com diysolarforum.com

I can use the SXS as an emergency battery and run the house for a few extra hours.
Click to expand...
also i happen to have a spare eg4 3000W laying around from a camper i used to have so i plan to use that to charge my batteries and also be able to use it as either a power source in the field for power tools or to charge my house batteries
 
MidwestBest said:
also i happen to have a spare eg4 3000W laying around from a camper i used to have so i plan to use that to charge my batteries and also be able to use it as either a power source in the field for power tools or to charge my house batteries
Click to expand...
Yeah, I have some cheapo 2K inverter wired in to the SXS, to run tools, etc. Used it on a cement mixer last year, to pour the footers for my ground mounts. Circle of life.
 
Vigo said:
Did you floor it yet? 😁
Click to expand...
Yup, had the wife and dog with me and gunned it up a slight incline. None of us can be considered lightweights. The cart only made it a few feet before the BMS shut it down.

While I did not time it, felt like about 30 seconds before the BMS auto reset. I can live with the 100A capacity for a 1/4 the price of a golf cart-specific lithium battery.
 
Last edited:
Thanks for the update! Sounds one would need either two server racks or one with an upgraded BMS to get full performance from most 48v carts.

I have a 48v cart and ive measured the peak draw but i forgot it!! I do remember it pulling about 60amps when doing top speed on level ground.
 
My AC motor cart would draw around 35A when doing top speed on level ground. Only three minor drawbacks with the server rack conversion:
  • The 100A BMS limitation. If it really bothers me I could swap with a 200A BMS.
  • No Bluetooth on the BMS, and the display is hidden under the seat. Should I swap the BMS I will fix that too.
  • The battery turns off after 12(?) hours without load. The reset button is difficult to reach, however plugging in the charger wakes the battery.
Two server rack cases will not fit under the seat. However the SOK is easily unscrewed into two separate battery racks [without even unwiring the cells] should I want to add a second battery.

EDIT: just saw your location. My battery came from a guy in Boerne and I picked it up during a business trip.
 
Last edited:
Maybe a JBD BMS with the contactor built in would work.
I think the contactor is rated for 500-600A
 
I would be concerned about changing BMS. It is there to protect the cells. Sure, you could put a 500A BMS in there, but then you would be drawing from the cells at 5C, which, as I understand it, is not good.
 
millsan1 said:
I would be concerned about changing BMS. It is there to protect the cells. Sure, you could put a 500A BMS in there, but then you would be drawing from the cells at 5C, which, as I understand it, is not good.
Click to expand...
In hindsight if I were to spend more money I would buy a second SOK for 10KWh and 200A. During grid-down I also use the cart to power my 3000va UPSverter and back-feed my breaker panel.
 

Attachments

  • ups.jpg
    ups.jpg
    97.8 KB · Views: 12
  • rollers.jpg
    rollers.jpg
    85.7 KB · Views: 12
  • Houston snow.jpg
    Houston snow.jpg
    261.7 KB · Views: 12
Yeah, I bought the golf cart specific batteries a little over a year ago. Pretty sure I am $8K into those. Now, the same setup, is like $5000.
 
Delmar said:
从该论坛的成员那里为我的雅马哈交流驱动高尔夫球车购买了一块几乎不使用的 SOK 5.1kwh 电池。在卸下 FLA 电池 [由于螺栓腐蚀而更换的最艰难的部分]并卸下几个支架后，服务器机架外壳有了完美的空间。

做了一些临时的接线连接，然后把推车拿出来试驾了很久。100A 的最大放电限制不会导致 BMS 关闭，但是我小心翼翼地不要从停止开始全油门。令人惊喜的是，随着 ~300 磅的重量减轻，乘坐质量得到了改善。期待有一个坚硬的巴克板。我想弹簧是渐进式的，所以我现在使用较软的部分。

有人需要一些带有 Hydrolink 浇水的二手特洛伊木马 T-875 的交易吗？
Click to expand...
 
You must log in or register to reply here.

Similar threads

Delmar
Don’t trust auto parts store battery cables
2 3 4
Replies
81
Views
3K
robbob2112
robbob2112
M
Is it practical to use golf carts with a large 15KWh batteries in a home Hybrid Solar system?
Replies
22
Views
1K
timselectric
T
G
Antra batteries same frontend as Trophy?
Replies
1
Views
322
joshn
J
boarder2k7
What did I just buy for $400? TWO 48v Server Rack Batteries
Replies
15
Views
1K
boarder2k7
boarder2k7
P
Server Rack batteries and solar panels in a (short) skoolie.
Replies
7
Views
631
Tomthumb62
Tomthumb62

diy solar

diy solar
Back
Top