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420ma 06-04-2018 09:08 AM

Battery loss
 
How much voltage can I expect my batteries to lose just sitting. I have a yewy charger, but I'm not comfortable leaving it out in the elements when I'm away from the cart. Also don't want it to grow legs and walk!

JohnnieB 06-04-2018 11:42 AM

Re: Battery loss
 
Typically about 1% of their charge per day.

420ma 06-04-2018 11:53 AM

Re: Battery loss
 
Thanks

420ma 06-04-2018 11:57 AM

Re: Battery loss
 
that's not a lot of time I could leave it alone...maybe 2 weeks tops before it goes below 50%. Hmmm....:shock:

Sergio 06-04-2018 12:13 PM

Re: Battery loss
 
That loss is in "storage capacity" not "Voltage".

A Trojan T-105 (225AH) could lose up to 2.25AH per day of available capacity when stored in high temperatures, typically loses are half that much.

JohnnieB 06-04-2018 01:19 PM

Re: Battery loss
 
The 1% of SoC per day is very generic and it includes parasitic losses in addition to the battery's self-discharge rate.

Different make/model batteries have different loss rates.
The same make/model of battery will have different loss rates in different carts.
Temperature and age of batteries also effect loss rate, plus other factors.

You more or less have to let the batteries sit for several days, measuring the voltage daily, to find out the loss rate of your specific batteries in your specific cart.

The going on 3 year old T-105 batteries I replaced when I went to 42V lost almost 1.5% per day after they were out of the cart. Of course, they werern't in good health since they had spent about a year and a half in Arizona as part of a golf course fleet before I got my 2008 cart in 2011. (Second set of batteries in three years, doesn't say too much for the care the batteries received at that golf course, but the Phoenix area is hot and dry.)

420ma 06-05-2018 05:15 AM

Re: Battery loss
 
Either way the bottom line is do I risk someone walking away with my charger or it getting damaged by the elements. Or keep the batteries charged? or drag the batteries home after every trip.

CrazyDad 06-05-2018 10:09 AM

Re: Battery loss
 
Why not mount the yewy under the seat and make it on board. I thought I saw a thread where someone made a lock for their seat. I’m thinking about doing this too.

420ma 06-05-2018 10:12 AM

Re: Battery loss
 
Quote:

Originally Posted by CrazyDad (Post 1508875)
Why not mount the yewy under the seat and make it on board. I thought I saw a thread where someone made a lock for their seat. I’m thinking about doing this too.

No room. Plus I just don't get a warm fuzzy walking away leaving something plugged in that I can't go check on. Scottyb said I could leave it plugged in with no issues but I just can't do it...OCD type thing.

CrazyDad 06-05-2018 10:26 AM

Re: Battery loss
 
I’ve been unplugging mine after a day also. It’s hot here in Texas and I hear the fan running while in float mode a lot. I share the OCD bug.


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