Scamp 12v Charging on Road Question - Page 4 - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-18-2014, 11:06 PM   #43
Moderator
 
Name: RogerDat
Trailer: 77 Scamp 13
Michigan
Posts: 3,080
When running a 12 volt load the ability of the alternator to respond to that load is the critical factor. Seem as if that would be different than just charging the house battery.

Regulator is going to respond to the overall voltage on the circuit being below it's target voltage, as long as the alternator has the capacity to deliver that plus a little left over you will charge rather than discharge.

I would imagine you could turn on the stuff you normally run in the TV and test voltage with a multi meter, then plug in trailer with fridge on and re-test voltage. If it is in the normal range for alternator ( I think between 13.8 and 14.1 or something like that) then your set up is good. Don't think the difference between #12 and #8 would make it work or not work unless it was within about 8% of alternator capacity.

Installing new line for a 7 pin connector on TV I would go with #8 since the cost difference is minimal and 8% greater charge voltage is enough to be worth it. In my case the main purpose of that power line is to charge the battery, Not going to be delivering an especially high charge rate anyway so every little bit helps.

Don't think I would be running fridge on 12 volt going down the road. And would want to test first because I'm not sure if my alternator is high enough amperage to handle that if I'm running the blower for AC or heater, head lights, wipers etc.
__________________

__________________
RogerDat is offline   Reply With Quote
Old 08-18-2014, 11:12 PM   #44
DJO
Member
 
DJO's Avatar
 
Name: DJO
Trailer: Parkliner #40 something
Colorado
Posts: 46
Registry
Thanks so much for this discussion! How do you know all this stuff?! We ran our battery dead last weekend and have been wondering what we did wrong. Likely driving with the fridge on did it.
__________________

__________________
DJO is offline   Reply With Quote
Old 08-18-2014, 11:56 PM   #45
Moderator
 
Name: RogerDat
Trailer: 77 Scamp 13
Michigan
Posts: 3,080
Quote:
Originally Posted by DJO View Post
Thanks so much for this discussion! How do you know all this stuff?! We ran our battery dead last weekend and have been wondering what we did wrong. Likely driving with the fridge on did it.
If you don't have a charge line running to your 7 pin plug you would be running straight battery until the battery died.

If you have a charge line for the house battery going back to the 7 pin plug you might want to see what alternator is rated for in amperage.

All the alternator in a typical vehicle is intended to do is run the normal vehicle stuff with a little left over to charge the battery back up after starting the vehicle. 10 amp load for fridge plus trailer battery may have just been too much. Sometimes there is a model of alternator that has higher output that your TV can use. Possible future upgrade.

Umm I think in my case mostly by running the battery dead or similar misadventures. Then asking around to find out why did that happen? In some lucky cases hearing about someone else having the misadventure so I gain from them sharing their pain on the forum.

Others have a career spanning decades in a related field to draw on. Nothing like doing something for a few decades to make you smarter than the average bear about that subject.
__________________
RogerDat is offline   Reply With Quote
Old 08-22-2014, 02:13 PM   #46
Member
 
Name: Robert
Trailer: Shopping
North Carolina
Posts: 32
Some states prohibit your rv/camper LP tanks from being turned on while driving. I know for a fact that areas that have tunnels along the major traffic arteries explicitly prohibit LP from being in the "ON" position while traversing the tunnel(s). Yeah, I know no one is PROBABLY going to stop you and check that it is off, but heaven help you if you are involved in an accident while the tank valves are open.
__________________
rdcastle is offline   Reply With Quote
Old 08-22-2014, 03:26 PM   #47
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
Quote:
Originally Posted by rdcastle View Post
Some states prohibit your rv/camper LP tanks from being turned on while driving....clip...
That is certified as being "Old Wives Tail #373"

There are no states that prohibit leaving the LP on while towing.

Yes... some tunnels and ferries require that LP be turned off, but there are no states with a general prohibition. Otherwise, how would all those LP power vehicles, and Refrigeration units on trucks that use lp, still be operated.
__________________
Bob Miller is offline   Reply With Quote
Old 08-22-2014, 06:19 PM   #48
Senior Member
 
papa-t's Avatar
 
Name: Ted
Trailer: (Dark side)Crossroads Now
Glade Valley, North Carolina
Posts: 969
I tow with my refrigerator on LP. I have for 16 years now on all different units.
__________________
“I have tried to live my life so that my family would love me and my friends would respect me. The others can do whatever the Hell they please!” —John Wayne
papa-t is offline   Reply With Quote
Old 08-22-2014, 06:56 PM   #49
Senior Member
 
Name: Dave
Trailer: 2010 Casita 17 Spirit Deluxe
Wisconsin
Posts: 145
Holly smoke, this much debate from that question!? Well anyway, I had to leave for our one week trip and just turned on the propane and ran it the whole time. Tank was nearly empty and amazingly didn't run out until the last day. It hardly used any gas.

Go ahead, crucify and shoot me for running the LP on the road. There are risks all over in life and I find the risk of driving with the LP tank on for the fridge pretty low as my occupation works around explosive gasses and dangerous things all day long. My fridge is on opposite side of where I filled up with gas and I always positioned on the far side of any gas pumps.

I highly suspect at least 75% of all Rv'rs do it all the time.
__________________
Vtec is offline   Reply With Quote
Old 08-22-2014, 11:39 PM   #50
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
Sorry... Always turn your LP refrigerators flame OFF when refueling.

While it may be on the opposite side from your filler, it can be also right next to the fuel tank filler on the vehicle that pulled in beside you and, when that person slops gas on the ground, the result will be on the local 6 o'clock news.

I only takes a minute every other day or so to stay safe and alive.
__________________

__________________
Bob Miller is offline   Reply With Quote
Reply

Tags
scamp


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Charging While Driving Question...? Boots Electrical | Charging, Systems, Solar and Generators 4 11-23-2011 09:56 PM
Battery charging question Joe in MN Problem Solving | Owners Helping Owners 5 09-25-2010 06:29 PM
Battery charging question Kent I Problem Solving | Owners Helping Owners 4 12-29-2008 06:30 PM
1977 scamp interior light question/12v ? Flygal Problem Solving | Owners Helping Owners 6 06-18-2008 11:03 AM
Another battery charging question Sonny Care and Feeding of Molded Fiberglass Trailers 8 09-30-2006 09:14 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.