Good Sam Club Open Roads Forum: Power cuts out when pump runs (on DC)
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Power cuts out when pump runs (on DC)

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next
Lynnmor

Red Lion

Senior Member

Joined: 07/16/2011

View Profile



Good Sam RV Club Member


Posted: 06/20/20 06:50am Link  |  Quote  |  Print  |  Notify Moderator

If you have a disconnect switch, check that as well, the cheap ones fail quickly.





2oldman

New Mexico

Senior Member

Joined: 04/15/2001

View Profile


Offline
Posted: 06/20/20 09:16am Link  |  Quote  |  Print  |  Notify Moderator

How are your batteries? You said 13+, but that isn't usually the case with resting batteries.

jdc1

Rescue, Ca

Senior Member

Joined: 05/30/2011

View Profile


Offline
Posted: 06/20/20 09:41am Link  |  Quote  |  Print  |  Notify Moderator

Is that 13.4 reading coming from your solar charger display?

D MAX

Canada

Full Member

Joined: 01/30/2008

View Profile



Posted: 06/20/20 01:21pm Link  |  Quote  |  Print  |  Notify Moderator

Well it looks like the problem is everyone’s favourite, an intermittent one. I could not replicate the problem today. It has to be a bad connection somewhere as the ride home bounced something back in place.

I do not have a cutoff switch.
The 13V readings were when I was having the problem after several cycles.
Today, Initial resting voltage at batteries was 14.2
Today, Initial charge controller reading was 14 and showing fully charged

I ran several cycles of lights on and water pump (7-10) and by the end the voltage was down to 12.8. It quickly recovers back to low13’s and 5 mins later is 13.6.

I have an accumulator tank so each cycle of the pump is about 20 secs.

So I’m going to check every connection and ground (battery terminals are good). I may also just find new ground points for sanity.

Thank you to everyone for the advice, I’ll report back if I find anything.

* This post was edited 06/20/20 01:43pm by D MAX *

KD4UPL

Swoope, VA

Senior Member

Joined: 03/16/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 06/20/20 05:08pm Link  |  Quote  |  Print  |  Notify Moderator

Are you sure your batteries are good. Your voltage measurments are useless because your solar charger is holding the voltage up. Batteries do not have a resting voltage of 14.2, that is under charge of some kind. In fact, 12.8 is a little high for resting voltage. A fully charged 12 volt battery at "rest" will only read 12.7 volts. With a little load it will always be below 12.7 volts if there is no charging source present.
Unhook you solar charger, unplug from shore power, then measure your voltage with and without a load.

D MAX

Canada

Full Member

Joined: 01/30/2008

View Profile



Posted: 06/21/20 05:32pm Link  |  Quote  |  Print  |  Notify Moderator

KD4UPL wrote:

Are you sure your batteries are good. Your voltage measurments are useless because your solar charger is holding the voltage up. Batteries do not have a resting voltage of 14.2, that is under charge of some kind. In fact, 12.8 is a little high for resting voltage. A fully charged 12 volt battery at "rest" will only read 12.7 volts. With a little load it will always be below 12.7 volts if there is no charging source present.
Unhook you solar charger, unplug from shore power, then measure your voltage with and without a load.


I haven’t had a lot of time to dig into it, but thanks as that’s a good idea to disconnect the panel. I’ve questioned the batteries from the get go as they are at least 5 hrs old, but if it was batteries why would it be intermittent? Unless there is a flakey cell I’d assume?

Jetstreamer

Milwaukee, Wisconsin

Senior Member

Joined: 12/16/2009

View Profile


Offline
Posted: 06/22/20 06:34am Link  |  Quote  |  Print  |  Notify Moderator

I don’t necessarily think they are implying your batteries are bad it’s just that your voltage readings are of no help in trying to diagnose the problem with a solar charger in the loop.

D MAX

Canada

Full Member

Joined: 01/30/2008

View Profile



Posted: 06/22/20 03:29pm Link  |  Quote  |  Print  |  Notify Moderator

Jetstreamer wrote:

I don’t necessarily think they are implying your batteries are bad it’s just that your voltage readings are of no help in trying to diagnose the problem with a solar charger in the loop.


That makes sense. I figured the charge controller wouldn't provide enough power to mask a bad battery, but as you and others said, it totally skews the useless numbers I was posting on voltage.

I removed it from the equation, and after a 4hr rest to equalize my voltage read 12.65. The only load would have been the LP detector. I proceeded to run the same test (all lights on and pump running). After 5-7 cycles the voltage remained fairly constant at 12.38 idle, and down to 12.3 when the pump kicked on. It dipped to 12.29 at one point, and was up to 12.46 after running all cycles. Lights remained bright, with a slight pulse in sync with the pump at the end of the cycle.

I could not replicate the original problem. So unless I misunderstand the battery voltage situation, it leads me to believe I have a wiring issue/sloppy connection somewhere.

Gjac

Milford, CT

Senior Member

Joined: 08/16/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 06/22/20 05:39pm Link  |  Quote  |  Print  |  Notify Moderator

Another thing to check is the set screws that hold your 12v wires in place on either side of the 12 v fuses a loose screw could cause an intermittent problem.

D MAX

Canada

Full Member

Joined: 01/30/2008

View Profile



Posted: 06/22/20 06:30pm Link  |  Quote  |  Print  |  Notify Moderator

Gjac wrote:

Another thing to check is the set screws that hold your 12v wires in place on either side of the 12 v fuses a loose screw could cause an intermittent problem.


Thank you, I’ll definitely check them.

Because this is intermittent and currently not a problem, it’s going to be more frustrating as I may not be able to actually ID the fix unless it’s super obvious. My weekend ahead will be the joy of going over all connections and insuring I have good grounds.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 3  
Prev  |  Next

Open Roads Forum  >  Tech Issues

 > Power cuts out when pump runs (on DC)
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.