Made the change from 36-72v

BLWN BUX · 10-27-2007, 08:41 PM

Hi Guys,

I changed all the batteries to 12's. No other changes at this point.
I have the stock 36V relay, and I just split the batteries for input voltage to coil. Motor is stock, W/ V-glide and resistor coils

I did a GPS befor @ 15 MPH with 36V 22" tires all stock.

@ 72V it does about 22MPH. I ran it WOT for about 2 miles. The motor was not hot to touch.

It's much faster than befor and there is about 2X the power.
It is SO NOT fast enough. What do I upgrade next?

Charging the batteries is a pain with my 36V charger. I need a 72 volt. Where do I get one of those?

Please comment with problem I may incounter

Thanks

roady89 · 10-27-2007, 08:57 PM

AWESOME! Welcome to the world of high voltage!

Here are a couple of 72 volt chargers. I have never used any of them so I cannot comment on the quality. The first link is Cloud Electric...they have several. The second is a cheap(er) 72 volt unit.

Cloud Electric-Battery Chargers

10 amp 72 volt charger

I don't know how long the resistor coils will hold up....at WOT the coils are out of the circuit but at slower speeds they will heat up quick.
I would also get rid of that 36 volt relay before it goes south on you. (I know you are just testing out the 72 volts. I would too.) There might be some gains when you upgrade to 4 gauge cables.

buckmanmike · 10-28-2007, 09:40 PM

I was thinking it should be closer to 30 mph @ 72 volts. I have no way to measure my speed but it seems to be near the 20-22 mph with 48v on 22in tires(82 ezgo w/resistors). Hope to convert to pb-6 and controller this next weekend.

roady89 · 10-28-2007, 10:01 PM

I was thinking the same thing. Get a full charge on those batts and re-run it.

Nate · 10-29-2007, 04:18 PM

BLWN BUX, you should get closer to 30 MPH on 72V if you get 15 MPH on 36V. The motor was not hot so you need to check and see what is hot. Something is sucking your extra power and 2 miles is plenty of time to heat it up.

BLWN BUX · 10-29-2007, 10:35 PM

I have issues,

I just did the battery Change and whent for some spins. I tell you it is quite impressive compared to B4. It snaps you head back even with the little motor.
I check it again and hit about 25-26 on flat, and low 30's on a slight downgrade.

I have allready smoked the 36V solinoid and its stuck on: Nice

The V glide is getting some rough action. There is some heat noted when I lift the seat. Not a lot but there is some losses there I am sure. I still need to change the cables to #2's but I suspect that this will only cause the weak links to fail faster.

I can't do anything untill I get a new solinoid.

roady89 · 10-29-2007, 10:58 PM

Here is one you might be interested in. I have not tried these yet but I am ASAP. I don't know what they cost yet either.

Gigavac relay

scottyb · 01-04-2008, 12:37 AM

I have a Q here. What about charging with 2 36v chargers - just split the pack for charging -I know where 2 36v charges are right now for $100@? You could use a battery key switch in the middle. Wondering if this would work? Also what type of 12v batteries are you using? Thanks.

Roady - awsome videos!

BLWN BUX · 01-04-2008, 12:02 PM

You are on the right track for being creative..

You can use 2 36 V chargers.
You could also us one to charge both sets (I do now)

You can use a 4 prong drier plug and receptical to parallel the 2 packs.
You just remove the plug when you disconect the charger.

You will have to remove 1 cable that conects the series. OR,, You can use the main solinoid to conect the series ( Put it in the middle instead of one end.

Here is the problem..

All of this is dangerous. These batteries have a lot of power! Dont get shocked by the system or you could die (No joke)

I am to understand that DC is somthing like 4 X AC, IE 72V DC = 288V AC

You dont want to be playing arround with switching cables all the time.

Additionaly, if you use a plug or switch to conect parallel, And you forget one time to unplug it, what do you think will happen when the series cable is replaces or the solinoid is closed.

Kaboom!!!

Ask me yow I know.

Good luck

Chad

BLWN BUX · 01-04-2008, 12:12 PM

Batteries:

I just went to Auto Zone

Marine Deep Cycles are like $65. I thike they are even $10 less at Sam's Club.

I don't know how long they will live but I didn't spend $1000 either.

I have not conpleted endurance test yet but I can tell you that I have drove it over 10 miles at WOT and It still seams strong.

10-27-2007, 08:41 PM	#1
BLWN BUX Not Yet Wild Join Date: Sep 2007 Location: Riverside, CA Posts: 42	Made the change from 36-72v Hi Guys, I changed all the batteries to 12's. No other changes at this point. I have the stock 36V relay, and I just split the batteries for input voltage to coil. Motor is stock, W/ V-glide and resistor coils I did a GPS befor @ 15 MPH with 36V 22" tires all stock. @ 72V it does about 22MPH. I ran it WOT for about 2 miles. The motor was not hot to touch. It's much faster than befor and there is about 2X the power. It is SO NOT fast enough. What do I upgrade next? Charging the batteries is a pain with my 36V charger. I need a 72 volt. Where do I get one of those? Please comment with problem I may incounter Thanks

10-27-2007, 08:57 PM	#2
roady89 nimda Join Date: Jun 2007 Posts: 13,022	Re: Made the change from 36-72v AWESOME! Welcome to the world of high voltage! Here are a couple of 72 volt chargers. I have never used any of them so I cannot comment on the quality. The first link is Cloud Electric...they have several. The second is a cheap(er) 72 volt unit. Cloud Electric-Battery Chargers 10 amp 72 volt charger I don't know how long the resistor coils will hold up....at WOT the coils are out of the circuit but at slower speeds they will heat up quick. I would also get rid of that 36 volt relay before it goes south on you. (I know you are just testing out the 72 volts. I would too.) There might be some gains when you upgrade to 4 gauge cables.
roady89 nimda Join Date: Jun 2007 Posts: 13,022

10-28-2007, 09:40 PM	#3
buckmanmike Gone Wild Join Date: Oct 2007 Location: Snellville, Ga. Posts: 1,304	Re: Made the change from 36-72v I was thinking it should be closer to 30 mph @ 72 volts. I have no way to measure my speed but it seems to be near the 20-22 mph with 48v on 22in tires(82 ezgo w/resistors). Hope to convert to pb-6 and controller this next weekend.

10-28-2007, 10:01 PM	#4
roady89 nimda Join Date: Jun 2007 Posts: 13,022	Re: Made the change from 36-72v I was thinking the same thing. Get a full charge on those batts and re-run it.
roady89 nimda Join Date: Jun 2007 Posts: 13,022

10-29-2007, 04:18 PM	#5
Nate Gone Wild Join Date: Dec 2006 Posts: 679	Re: Made the change from 36-72v BLWN BUX, you should get closer to 30 MPH on 72V if you get 15 MPH on 36V. The motor was not hot so you need to check and see what is hot. Something is sucking your extra power and 2 miles is plenty of time to heat it up.
Nate Gone Wild Join Date: Dec 2006 Posts: 679

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

10-29-2007, 10:35 PM	#6
BLWN BUX Not Yet Wild Join Date: Sep 2007 Location: Riverside, CA Posts: 42	Re: Made the change from 36-72v I have issues, I just did the battery Change and whent for some spins. I tell you it is quite impressive compared to B4. It snaps you head back even with the little motor. I check it again and hit about 25-26 on flat, and low 30's on a slight downgrade. I have allready smoked the 36V solinoid and its stuck on: Nice The V glide is getting some rough action. There is some heat noted when I lift the seat. Not a lot but there is some losses there I am sure. I still need to change the cables to #2's but I suspect that this will only cause the weak links to fail faster. I can't do anything untill I get a new solinoid.

01-04-2008, 12:37 AM	#8
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,419	Re: Made the change from 36-72v I have a Q here. What about charging with 2 36v chargers - just split the pack for charging -I know where 2 36v charges are right now for $100@? You could use a battery key switch in the middle. Wondering if this would work? Also what type of 12v batteries are you using? Thanks. Roady - awsome videos!

01-04-2008, 12:02 PM	#9
BLWN BUX Not Yet Wild Join Date: Sep 2007 Location: Riverside, CA Posts: 42	Re: Made the change from 36-72v You are on the right track for being creative.. You can use 2 36 V chargers. You could also us one to charge both sets (I do now) You can use a 4 prong drier plug and receptical to parallel the 2 packs. You just remove the plug when you disconect the charger. You will have to remove 1 cable that conects the series. OR,, You can use the main solinoid to conect the series ( Put it in the middle instead of one end. Here is the problem.. All of this is dangerous. These batteries have a lot of power! Dont get shocked by the system or you could die (No joke) I am to understand that DC is somthing like 4 X AC, IE 72V DC = 288V AC You dont want to be playing arround with switching cables all the time. Additionaly, if you use a plug or switch to conect parallel, And you forget one time to unplug it, what do you think will happen when the series cable is replaces or the solinoid is closed. Kaboom!!! Ask me yow I know. Good luck Chad

01-04-2008, 12:12 PM	#10
BLWN BUX Not Yet Wild Join Date: Sep 2007 Location: Riverside, CA Posts: 42	Re: Made the change from 36-72v Batteries: I just went to Auto Zone Marine Deep Cycles are like $65. I thike they are even $10 less at Sam's Club. I don't know how long they will live but I didn't spend $1000 either. I have not conpleted endurance test yet but I can tell you that I have drove it over 10 miles at WOT and It still seams strong.

Similar Threads
Thread	Forum
first oil change - don't laugh!	Gas Club Car
02 TXT rear end oil change ???	Gas EZGO
EMP made the cover story of Golfcar adviser	Announcements