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DIY 230Ah EVE Mobile Battery (aka) EZGO Golf Cart

I bought an old 1986 lifted 36 volt ez go golf cart.
Came with trophy ? lead acid batteries. H go it a few years out of them.
Bought a 5 KWh 36 volt gator ? max battery from big battery.
Such an awesome upgrade. Lighter, faster and climbs our steep 15 degree hills no problem. I used to use our small tractor ? for cutting and hauling wood ? but the cart now does most of the work.
I didn’t want to mess with trying to make my own battery.
Link to battery ? here. They also do 48 volt packs: https://bigbattery.com/products/36v-gator-max-kit-lifepo4-120ah-5kwh/
21B61B5E-99AF-4332-8FAA-FA2DD2A0DE17.jpegCE26B6FC-A7E8-49F2-8BE6-5C5C046BCDE7.jpeg
 
richwolf said:
I bought an old 1986 lifted 36 volt ez go golf cart.
Came with trophy ? lead acid batteries. H go it a few years out of them.
Bought a 5 KWh 36 volt gator ? max battery from big battery.
Such an awesome upgrade. Lighter, faster and climbs our steep 15 degree hills no problem. I used to use our small tractor ? for cutting and hauling wood ? but the cart now does most of the work.
I didn’t want to mess with trying to make my own battery.
Link to battery ? here. They also do 48 volt packs: https://bigbattery.com/products/36v-gator-max-kit-lif
Click to expand...
That's a real working cart. I love it. I looked at some of the prebuilt packs. I couldn't find anything that had the output (48v 230ah) that was as compact as what I built. It was also less expensive at around $2200 for the parts. The kits similar in output to mine would cost over $5000. https://bigbattery.com/products/48v-flcn-elite-kit-lifepo4-244ah-12-24kwh/ I need to make it sealed, but we only use it on the roads and paved trails were we live.
 
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raurre said:
That's a real working cart. I love it. I looked at some of the prebuilt packs. I couldn't find anything that had the output (48v 230ah) that was as compact as what I built. It was also less expensive at around $2200 for the parts. The kits similar in output to mine would cost over $5000. https://bigbattery.com/products/48v-flcn-elite-kit-lifepo4-244ah-12-24kwh/ I need to make it sealed, but we only use it on the roads and paved trails were we live.
Click to expand...
Your setup and craftsmanship is top notch for sure.
You have twice the capacity of mine but I wanted plug ? and play (errrr work!) and thankfully that’s what I got. I don’t know what my range is but I only charge once every few weeks.
My tires make it pretty much go anywhere.
Steep hills and off road is no problem.
My brakes got scary but once I put on new shoes ? there’s no worries now.
 
In the snow

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2/0 cable is used in my main system connections. The cart is really just for reserve. I know the resistance of the tether makes it uneven for charging and discharging, but for the way it's being used it works well. Here's a link to my main build if you're interested. Thread 'MPP LV6548 Solar Build / 30 kW EVE 304ah LiFePO4 battery/ 14 kW PV array' https://diysolarforum.com/threads/m...e-304ah-lifepo4-battery-14-kw-pv-array.32343/
 
youunclefats said:
My problem is do I need 22s or 24s? Need some pro cart builder advise,
Click to expand...
It is not a big problem. Most motor controllers of that size are tolerant of voltage. It may depend on chemistry. Higher voltages in motors often mean higher RPMs. 22 x 3.2 nominal voltage for LFP cells is 70.4 volts. 24 cells is 76.8 volts. If using another chemistry the values will be different
 
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I’d call ☎️ em and see if they can help you.
They should know.
Mine was pretty easy to install. I see top voltage of 45 volts and I’ve not had a problem with lots of hard use.
 
@raurre

Finally made a vid of my build. was a long time in the making and some big hurdles to get a video mashed together. Thanks for the words, it was a lot easier than i thought, and WAY BETTER!!!

In hindsight, i wish i had done 2 36v or wired a 48 volt battery together inside the 72v, so i had the option to run a hybrid inverter, im sitting on like 3kw of energy :( maybe another day i can redo the wiring.

Video of my battery build
 
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seneysolar said:
Does this mean i can claim a golf cart under the solar tax credit?
Click to expand...
Well technically it could be considered energy storage if you can power your inverter / house.
It could also be considered a safety feature being able to quickly move the battery pack if the house were on fire.
It would also be resistant to earthquakes with built in shock absorption.

Making Our Homes More Efficient: Clean Energy Tax Credits for Consumers

Making Our Homes More Efficient: Clean Energy Tax Credits for Consumers
www.energy.gov www.energy.gov
Of course consult with a tax professional...
 
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