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Old 10-15-2021, 12:40 PM   #1
ski-vail
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Default lithium conversion Yamaha YDRE

Hello, I own a 2009 Yamaha YDRE 48 volt electric golf cart. I was in need of batteries but none were to be found in my area at this time. The t-1275 are on back-order. I decided to buy a 48volt 60ah lithium battery pack and do a conversion. I have lithium battery and it registers fully charged and 52.8 volts. I hooked it up to my cart and took cart out of tow mode and turned on switch. When I took out of tow mode I heard the famous click of the controller, same thing when I turned the key to "on". I tested lights, blinkers, horn, reverse switch (with backup tone), everything tested OK. I left they key "on" for about 30 min. When I got back nothing was working. I checked battery voltage and there was nothing, no voltage across the positive/negative terminals. I placed in tow mode, disconnected positive lead and checked battery, immediately registered 52.8 volts. Hooked up positive terminal , still tested at 52.8 volts, placed in "run" mode and got "click" and then nothing, Zero voltage out of battery. I'm thinking it could be the battery BMS. But not sure. Any ideas/help will be appreciated!
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Old 10-15-2021, 03:56 PM   #2
Pat911
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Default Re: lithium conversion Yamaha YDRE

Have you charged it yet?
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Old 10-15-2021, 04:04 PM   #3
Volt_Ampere
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Default Re: lithium conversion Yamaha YDRE

Sounds like your BMS is shutting down the battery output. Battery probably needs charging. Follow the manufacturer's instructions!
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Old 10-16-2021, 12:06 PM   #4
ski-vail
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Default Re: lithium conversion Yamaha YDRE

Yes battery is fully charged. I agree BMS is shutting down battery.

This is a totally stock cart. Does anyone know how many AMPS or Watts are being pulled (required) by a Yamaha G29 with YDRE controller when cart is placed in "run" mode?
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Old 10-16-2021, 12:34 PM   #5
DaveTM
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Default Re: lithium conversion Yamaha YDRE

Fully charged? My 48V pack is fully charged at 57.0V, and when I get to 51V I get nervous, and when I get to 50V (at rest) it's gonna get charged.

Then there's this from a Yamaha golf cart troubleshooting web site:

The batteriesí voltage: This is one of the primary reasons for your golf cart controllerís death. There are times when the battery voltage is too low or too high. The ideal battery voltage is between 12 to 48 volts.

I know NADA about Yam's but is your controller a factory 48V controller?
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Old 10-16-2021, 02:06 PM   #6
Volt_Ampere
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Default Re: lithium conversion Yamaha YDRE

Sounds like your battery's BMS is set to a low max current draw which is probably shutting it down. Go to the source of your battery for help solving the problem. I am running two Yamaha YDRE's on Lithium but I am using Leaf cells that I built up myself with my own BMS. Run current at 20mph is about 70 amps. Start current from dead stop is over 250 amps.
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Old 10-17-2021, 10:58 AM   #7
ski-vail
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Default Re: lithium conversion Yamaha YDRE

Thanks for the great feed back. It sounds like my battery might not be fully charged (even though charger says it is) or maybe it is the BMS set to a low max current draw. I'll spend sometime in the next few days reviewing and checking everything I have done up till this point and report what I find.
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Old 10-17-2021, 11:03 AM   #8
ski-vail
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Default Re: lithium conversion Yamaha YDRE

BTW yes my controller is Yamaha factory. It's known as a Yamaha YDRE - 270 amps controller. I've read a lot of different articles about they are not the best but they do work and I'm not looking to go 30 MPH. I just want to get to the golf course, play a round, and get home then put it back on the charger.
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