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02-09-2016, 09:28 PM | #11 |
Gone Wild
Join Date: May 2010
Location: FS LOUISIANA
Posts: 158
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I’m just re-using the original factory supplied controllers that are capable of 500amps. Unfortunately it seems you can’t program these like the alltrax. If I could I would simply limit the amps the controllers pulled.
So one 60 ah 53v nominal pack can handle 240 amp continuous? |
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02-09-2016, 09:35 PM | #12 |
Getting Wild
Join Date: Nov 2015
Location: Seattle,WA /Sebastian,FL
Posts: 106
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
Yes, a single module is rated to 240A continuous.
A module contains 4 cells in a 2S2P configuration (8.4v at 60AH). Each cell is rated at 4.2V 30AH. See attachment to see how cells are configured inside each module |
02-09-2016, 09:46 PM | #13 |
Gone Wild
Join Date: May 2010
Location: FS LOUISIANA
Posts: 158
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
Thanks rottie. You wouldn't happen to know of a good amp meter that I could pick up to do some analysis on my buddies buggy to get a feel for the amps it draws under load? That would be the easiest way to get the answer I need.....as long as the meter I need doesn't cost $1,000.
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02-09-2016, 11:13 PM | #14 |
Getting Wild
Join Date: Nov 2015
Location: Seattle,WA /Sebastian,FL
Posts: 106
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I would say look on eBay for any meter with external shunt.
I would start at a 500-600amp versions There are a million options, it all depends on what you requirements are. A simple setup is get a 500A at 50mV shunt with 50mV analog meter. This will give you quick answers for probably less than $100. If you want higher resolution, then look at the digital versions, but be aware that they usually required a isolated DC source to power the meter. Also the digital type usually goes in the negative lead. |
02-10-2016, 09:11 AM | #15 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,171
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I would go with 120AH - 14 Leaf modules. Wire them in 7S2P to get nominally about 50V and 120AH. Weight is 120 pounds. Volume is about two of your old batteries.
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02-10-2016, 09:57 AM | #16 |
Getting Wild
Join Date: Nov 2015
Location: Seattle,WA /Sebastian,FL
Posts: 106
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I agree with Volt_Ampere as a good start.
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02-10-2016, 10:40 AM | #17 |
Gone Wild
Join Date: Oct 2013
Posts: 297
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I cant see pictures but, I'm going to follow along! This is going to be interesting.
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02-10-2016, 02:34 PM | #18 |
Gone Wild
Join Date: May 2010
Location: FS LOUISIANA
Posts: 158
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
I found out the meter I have coming will read amp draw real time with a 75mv 1000amp shunt. That will allow me to do some testing on my buds cart to see what two motors pull. I will probably end up with the 120 ah pack.
Are the pics not working for everyone? I'll post a link to a great write up on the JDL404 that I found later when I get home. |
02-10-2016, 08:58 PM | #19 |
Gone Wild
Join Date: May 2010
Location: FS LOUISIANA
Posts: 158
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
EVTV has a great writeup on the JDL404 Meter. Really good for those who are looking to install their own. Here is the path to the pdf.
http://media3.evtv.me/JLD404AH.pdf |
02-10-2016, 11:11 PM | #20 |
Gone Wild
Join Date: Oct 2013
Posts: 297
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Re: 48 volt twin motor twin 500 amp controllers on lithium power
Where does an amp meter hook into the electrical circuit?
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