36 volt golf cart- battery conversion??

[Picacho55]

I need to swap out my 6- 6volt GC2 batteries ( Sams club Duracell that have lived way longer than expected). Many YTubers say to use 3 12 volt marine deep cycle but they never come back on to say how long they actually last. Any body out there have real experience ??? Thanks , RJ

 

[Noel]

I need to swap out my 6- 6volt GC2 batteries ( Sams club Duracell that have lived way longer than expected). Many YTubers say to use 3 12 volt marine deep cycle but they never come back on to say how long they actually last. Any body out there have real experience ??? Thanks , RJ

That’s just a cheaper way. The reason they use 6 is the amp hours to last longer per charge if you could package 12 3 volts it would be even better

 

[jeepinmatt]

If these are the ones you are talking about

Duracell Golf Car Battery, Group Size GC2 - Samsclub.com

Buy Duracell Golf Car Battery, Group Size GC2 at Samsclub.com

www.samsclub.com

they are rated at 215Ah (amp hours, at 20amps I think), so your total 36volt pack is a 215Ah rating.

Picking a random Exide marine battery for $170 at home depot Nautilus 31 Deep Cycle Marine Battery 31MDC - The Home Depot
it has a 115Ah rating, so 3 of those would give you 115Ah at 36 volts.

115/215=0.535, so it would last about 53% of the 36 volt pack with those GC2 batteries. That's obviously just a theoretical calculation that doesn't account for many things, but you could safely figure they last about half as long.

However, there are lots of other "marine" batteries out there, so if you could find some with 200 amp hour rating, it would be similar run time. I have an electric side by side, and it uses 155Ah batteries, and they are big and about 100lb each, so you aren't going to find to many bigger than that and still be able to fit them in place of the 6v pack. I also just finished a lithium conversion on my side by side, and went from 750lbs of batteries to 200lbs of batteries and added about 40% to my range. It wasn't cheap, but the lead acid batteries were about due for replacement anyway. If you can handle a 50% drop in range, and just want to keep cost down, the 12v would be a good way to go.

 

[Lankford]

There's some 36 volt lithium kits on Amazon that can be had for abotu the same price as 6 new 6 volt batteries.

Ive never used this. Just a sample.

https://www.amazon.com/OGRPHY-Lithium-Batteries-Charger-Trolling/dp/B0CWGKYT12/ref=sr_1_1_sspa?dib=eyJ2IjoiMSJ9.f6rCVN52abOsGkdOmFkefsQc-hHkcu4QSL8eoY6lbqJ841iwaYnhXaS0a1Jz3STB340Nva11h2D_rAiTlTWXD0fnPTSK23zpcB89fat3kv0UzxWFIAbl4tJL1tdiDz0LbHEsClbH8rLJOC6AggYwJiejQQvPmHqd9gFhRA9wdIbYHl3E-VIS1JxWXFO4qWLzi-_REuq2FOClPAN8LV9vrqnSLg_zZRmiSOrseZfQSrI.4Xnyc5wxvv9fVPV-XpEXfM0lXn7IHJRRfFFrPV-AfgQ&dib_tag=se&hvadid=694171055694&hvdev=c&hvexpln=67&hvlocphy=9009624&hvnetw=g&hvocijid=10646646990282318129--&hvqmt=b&hvrand=10646646990282318129&hvtargid=kwd-2279209043269&hydadcr=10640_13664854&keywords=36+v+lithium+golf+cart+battery+kit&mcid=eac5d7345e823230b64882eea9c75d15&qid=1747939727&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

 

[Picacho55]

If these are the ones you are talking about

Duracell Golf Car Battery, Group Size GC2 - Samsclub.com

Buy Duracell Golf Car Battery, Group Size GC2 at Samsclub.com

www.samsclub.com

they are rated at 215Ah (amp hours, at 20amps I think), so your total 36volt pack is a 215Ah rating.

Picking a random Exide marine battery for $170 at home depot Nautilus 31 Deep Cycle Marine Battery 31MDC - The Home Depot
it has a 115Ah rating, so 3 of those would give you 115Ah at 36 volts.

115/215=0.535, so it would last about 53% of the 36 volt pack with those GC2 batteries. That's obviously just a theoretical calculation that doesn't account for many things, but you could safely figure they last about half as long.

However, there are lots of other "marine" batteries out there, so if you could find some with 200 amp hour rating, it would be similar run time. I have an electric side by side, and it uses 155Ah batteries, and they are big and about 100lb each, so you aren't going to find to many bigger than that and still be able to fit them in place of the 6v pack. I also just finished a lithium conversion on my side by side, and went from 750lbs of batteries to 200lbs of batteries and added about 40% to my range. It wasn't cheap, but the lead acid batteries were about due for replacement anyway. If you can handle a 50% drop in range, and just want to keep cost down, the 12v would be a good way to go.

That is exactly the battery I used, on a recommendation from an old friend who owns a photovoltaics company and speaks fluent electrical genius. Sticker on batteries is 05/09 so I can't complain. They were starting to go last summer (cart gets used through Michigan spring and summer). The 12 volt "solution" is pretty much what I thought. Not too excited about buying china batteries from amazon (they can both go pound sand!) Thanks for your reply. RJ...out