Battery Voltage and Usage

Rosie · August 16, 2008, 04:38:08 PM

Does any one know what voltage the house batteries would be at 50 or 60 per cent usage? Also who out there is going to Bristol next weekend?? We will be camping at Lady Equipment on Volunteer Parkway.
Thanks,
Rosie

Utahclaimjumper · August 16, 2008, 04:44:59 PM

If you have a simple volt meter, then 12 Volts would be the 50% point, don't go lower if it can be helped, batteries hate it.>>>Dan

Utahclaimjumper · August 16, 2008, 04:46:22 PM

I assumed you have a 12 volt system.>>>Dan

jjrbus · August 16, 2008, 06:21:19 PM

Simple chart on page

http://www.otherpower.com/otherpower_battery_metering.html HTH Jim

NJT5047 · August 16, 2008, 07:51:27 PM

OK...I got this. 60% discharge on a 12V battery is about 12.28 V. 24V would be at 60% @ 24.5 V. Good huh?

Thanks Jim....!
JR

Rosie · August 16, 2008, 09:07:57 PM

I do have a 12 volt system. Thanks for all the help, I really didn't want to kill my new batteries!
Thanks,
Rosie

Brian Diehl · August 17, 2008, 08:53:31 AM

Rosie,
Here is what I use:

http://www.bogartengineering.com/trimetric.htm

You really need to get this as any battery voltage reading used for the purpose of "state of discharge" needs to be taken after the batteries have sat with no load on them for 12 hours.

This really is going to be one of the best purchases you can make on your conversion system as it will help you keep your batteries alive. I have over 5 years on my batteries right now and they still behave like they were brand new.
-Brian

NJT5047 · August 17, 2008, 08:20:54 PM

Quote from: Rosie on August 16, 2008, 09:07:57 PM
I do have a 12 volt system. Thanks for all the help, I really didn't want to kill my new batteries!
Thanks,
Rosie

How do you charge the 12V house system when on the road? Generator?
JR

JohnEd · August 17, 2008, 10:58:51 PM

Brian,

Can't I get the Trimetric monitoring features/capability from a Trace Inverter equiped with a Link monitor?

Thanks,

John

Brian Diehl · August 18, 2008, 06:40:32 AM

John, I haven't studied the Link monitor in depth, but do recall it provided similar functionality.

belfert · August 18, 2008, 08:53:22 AM

If I remember correctly the Link monitor is an OEM version of the Trimetric.

HB of CJ · August 18, 2008, 01:43:27 PM

Best guess here using lead acid golf cart type is around 12.2 vdc with no load and about 5 minutes to stabilize. A total use watt/amp/hr gage would keep track of things a lot better.

An old rule of thumb (perhaps hopelessly out of date) is that you want to keep the golf cart type lead acid batts above 12.0 volts at all costs and 12.25 volts if possible.