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Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Carol & Scott on March 05, 2017, 04:52:21 pm

Title: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 04:52:21 pm
Yes we are plugged into 50 amp and have been for 3 weeks.  We have 4 8a8d batteries about 3 years old.

Our Prosine Control Panel - 2.5 shows:  13.00 DC Voltage,  5 amps Current, Inverter in "Standby" mode and charger shows "Ready".

I presume that I should be showing at least 13.75 DC Voltage?????

Thoughts?
Title: Re: Prosine 2.5 readings
Post by: John Haygarth on March 05, 2017, 04:55:07 pm
Scott, turn inverter to off and charger off, now what does it show for voltage??
JohnH
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 05:01:47 pm
13.00 DC volts.
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 05:03:24 pm
Turned back on.  Now shows: 13.75 in Standby.
Title: Re: Prosine 2.5 readings
Post by: Travelin' Man (RIP) on March 05, 2017, 05:13:19 pm
A reading lower than 13.75 VDC should say 13.00 until it goes below 13.00.

Mine said 13.00 also so I followed John's advice, obtaining the same result as you Scott.

But when the charger is first turned back on doesn't it go into "bulk" charge causing the higher reading?
Title: Re: Prosine 2.5 readings
Post by: wolfe10 on March 05, 2017, 05:13:45 pm
Inverter on or off should make no difference for charging function when on shore power or generator.

Depending on temperature, 13.0 is a little low (if that is the actual voltage-- not just idiot lights). 13.2-13.5 is more standard for float voltage.
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 05:20:23 pm
Idiot lights. 

Will be digging into this when we get to Tucson next week.  On batteries am only getting about 4.5/5 hrs before auto generated start starts gen set.  With 4 8a8d batteries should have min of 440 ah before I get to 12.2?

Thoughts?
Title: Re: Prosine 2.5 readings
Post by: Jim Frerichs on March 05, 2017, 05:27:41 pm
I hate to mention this, you could have a bad battery/batteries or connections that are resistive somewhere.
Have you cleaned and tightened the battery terminals?

Jim

2002 U320
Title: Re: Prosine 2.5 readings
Post by: wolfe10 on March 05, 2017, 05:33:08 pm
Scott,

Tell us your voltage at the batteries from a digital voltmeter.  If the idiot lights show 13.0 and the next increment is 13.5, you may be just fine.

BTW, we just pulled into the FMCA Convention in Chandler.
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 05:51:31 pm
All 4 are reading 14.1. 
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 05:57:10 pm
Jim - I have not checked the battery terminal clamp tightness.  Will do that tomorrow as well as cleaning the terminals. 

Brett - Have fun in Chandler.  I might drive up on the 9th to have a look see.
Title: Re: Prosine 2.5 readings
Post by: kenhat on March 05, 2017, 05:59:15 pm
If the batteries are tied together they will all read the same. To get a "valid" reading you will need to disconnect all batteries, let sit for at least an hour, and then check. PIA I know... :(

We have several shade tree engineers here at Justin's to help you out. :)

see ya
ken
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 06:01:27 pm
Thanks Ken - The batteries are all tied together.  I am sure we take you up on that offer.  It is a PIA which is why I haven't done it yet.  :D
Title: Re: Prosine 2.5 readings
Post by: wolfe10 on March 05, 2017, 06:09:25 pm
Jim - I have not checked the battery terminal clamp tightness.  Will do that tomorrow as well as cleaning the terminals. 

Brett - Have fun in Chandler.  I might drive up on the 9th to have a look see.

3/9  is my busy day.  Might see you at one of the Seminars I present:

Suspensions – Thursday, 3/ 9, 11:30 a.m. -12:45 p.m.       Seminar 2

Caterpillar – Thursday, 3/9, 3:15 p.m. – 4:30 p.m.       Seminar 2 (a good one to attend even if you have a Cummins engine-- 95% of the problems are not in the engine itself.  The support systems {cooling, fuel, air, electric, etc} is what I discuss).

Diesel RV Club Social– Thursday, 3/9, 5:00 p.m. - 6:00 p.m.Seminar 2 (suspect there might be free pizza!)
Title: Re: Prosine 2.5 readings
Post by: Carol & Scott on March 05, 2017, 06:21:17 pm
Maybe the RV club social.  Being an FMCA member, can I get in?