Questions about solar power - Page 14 - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-16-2014, 06:41 PM   #183
Senior Member
 
Tim Wood's Avatar
 
Name: Tim
Trailer: Class B for now
NY
Posts: 747
Stev, Those look like nice brackets. I'm going to start ordering things tomorrow.
__________________

__________________
Tim Wood is offline   Reply With Quote
Old 03-20-2014, 08:18 PM   #184
Senior Member
 
MCDenny's Avatar
 
Name: Denny
Trailer: Lil Snoozy
Michigan
Posts: 551
I posted this on Night Sailor's "solar install" thread but thought I'd duplicate it here.

My question is "do I need an off-on switch for the solar panel?"

My panel will be on the roof most of the time but will slide out of the roof top rack to go in a portable frame on the ground if I'm parked in a shady spot. I'll be able to disconnect the MC4 plugs connecting the panel to its harness and I have a difficult-to-access circuit breaker that disconnects the +12 battery terminal from everything but I'm really wondering if there is a reason to have a convenient off-on switch indoors.

Is there any routine (not maintenance) reason to turn off the panel?

How about when the battery charger is plugged in?

How about driving when the tow vehicle battery is connected in parallel to the trailer battery?

I'm starting my solar install tomorrow and this is the last question I have (right now).
__________________

__________________
MCDenny is offline   Reply With Quote
Old 03-20-2014, 11:20 PM   #185
Senior Member
 
Night Sailor's Avatar
 
Name: Conrad
Trailer: Bigfoot 3000 & Barth "slide-in" truck camper
Connecticut
Posts: 963
Send a message via Skype™ to Night Sailor
No, you can leave it connected. I just have a fuse between the panels and the battery. They recommend placing the fuse close to the battery.

If you want to work on the pale circuits, cover the panels, disconnect the battery.
__________________
Night Sailor is offline   Reply With Quote
Old 03-20-2014, 11:22 PM   #186
Senior Member
 
Night Sailor's Avatar
 
Name: Conrad
Trailer: Bigfoot 3000 & Barth "slide-in" truck camper
Connecticut
Posts: 963
Send a message via Skype™ to Night Sailor
You can rub the battery charger at the same time.

You can leave it connected to the car. This might draw down your house bank if you have a bad cell in you car battery. With solar , it will help keep your car battery topped up.
__________________
Night Sailor is offline   Reply With Quote
Old 03-20-2014, 11:23 PM   #187
Senior Member
 
Night Sailor's Avatar
 
Name: Conrad
Trailer: Bigfoot 3000 & Barth "slide-in" truck camper
Connecticut
Posts: 963
Send a message via Skype™ to Night Sailor
If you have a good charge controller you can leave it connected all the time.
__________________
Night Sailor is offline   Reply With Quote
Old 03-21-2014, 12:08 AM   #188
Senior Member
 
Mike Magee's Avatar
 
Name: Michael
Trailer: Li'l Hauley
Oklahoma
Posts: 5,142
The controller's specs will tell if it prevents power from drawing backward from battery to panel overnight. Good controllers like Morningstar do this. Lack of reverse draw prevention would be the only reason I know of to have a switch.
__________________
How much time do we have left? 2 Chr. 7:14
Mike Magee is offline   Reply With Quote
Old 03-21-2014, 12:25 AM   #189
Senior Member
 
peterh's Avatar
 
Name: Peter
Trailer: 2005 19 ft Scamp 19 ft 5th Wheel
Oregon
Posts: 1,519
Registry
Larger rooftop systems that run above 50v must have interrupters in the series wiring between panels, because above 50v the skin's electrical resistance value hits its breakdown point, and current can make the jump to that nice, salty, conductive fluid found just below your skin. Unless you're connecting four or more panels in series you won't run into this.

MC4 connectors are not, by the way, intended to be connected and disconnected frequently. You might be better off getting SAE 2-pin connectors and using them. They're designed for quick connect and disconnects.

I've got one of these for the side of our Surfside trailer to connect our movable panel set and 2, 25 foot 12g SAE 2-pin cables to connect the panels.


Picture from
73 SAE Connectors, Plugs, Sockets & Cords


__________________
peterh is offline   Reply With Quote
Old 03-21-2014, 07:06 AM   #190
Senior Member
 
blodn1's Avatar
 
Name: Deborah
Trailer: Prius camping - want an Oliver
Virginia
Posts: 351
Most of the wiring diagrams I've seen show the switches at either side of the controller so that one or both sides can be isolated.
__________________
I don't get lost, I go on interesting side trips.
blodn1 is offline   Reply With Quote
Old 03-21-2014, 10:38 AM   #191
Senior Member
 
Night Sailor's Avatar
 
Name: Conrad
Trailer: Bigfoot 3000 & Barth "slide-in" truck camper
Connecticut
Posts: 963
Send a message via Skype™ to Night Sailor
My uncle tells me camping in Alaska requires parking in the sun to avoid the bugs. Most places parking in the shade is preferred, so a remote panels make good sense due to their flexibility. I opted for permanent installation for convenience and security.
__________________
Night Sailor is offline   Reply With Quote
Old 03-21-2014, 10:41 AM   #192
Member
 
Name: steve
Trailer: Born Free Fiberglass
California
Posts: 51
Regarding the SAE connectors.
Thanks for the link. Good idea.
Wonder if there is any that are 10 gauge wire?
__________________
stev is offline   Reply With Quote
Old 03-21-2014, 12:26 PM   #193
Senior Member
 
Name: Russ
Trailer: Scamp 16' side dinette, Airstream Safari 19'
California
Posts: 588
Quote:
Originally Posted by peterh View Post
MC4 connectors are not, by the way, intended to be connected and disconnected frequently. You might be better off getting SAE 2-pin connectors and using them. They're designed for quick connect and disconnects.
Peter,
I have a 2 panel portable system that I left the MC4 connectors on the panels due to warranty requirement. I could have made short adaptors with MC4 to
Anderson connectors, but thought having 2 connectors seemed bulkier and more resistance etc. I always plug in the MC4 before any load is connected to eliminate arcing. The locking feature of the MC4 is not needed in my application, so I could remove the locks I suppose to avoid the need for the release tool.
The Anderson's work so well I may be better off just making the adaptor, so my extension cords would be bi- directional and I could then run both cables to one panel if I needed extra length to get out of the shade.
Russ
__________________
ruscal is offline   Reply With Quote
Old 03-21-2014, 12:31 PM   #194
Senior Member
 
peterh's Avatar
 
Name: Peter
Trailer: 2005 19 ft Scamp 19 ft 5th Wheel
Oregon
Posts: 1,519
Registry
Quote:
Originally Posted by Night Sailor View Post
. . . I opted for permanent installation for convenience and security.
Our two trailers have 100w of fixed, roof-mounted solar, and we really like that. No fuss, no muss, no hassle, and very minimal theft concerns. THe trade-off is less power when you're parked in the shade.

Less power, but not no power. To suppliment our panels when we're in a shady spot I built a 40w, suitcase-sized satellite unit with an integrated 10-foot SAE 2-Pin cable from two aluminum-framed 20w mono panels. When folded, the cable and extension cables, and its disassembled PVC pipe stand tuck neatly in the space behind the panels.

In most cases, the 10' cable is too short, and I have to use one or both 25' extension cords. Having two shorter cables instead of one long one helps me keep voltage loss to a minimum.
__________________
peterh is offline   Reply With Quote
Old 03-21-2014, 09:58 PM   #195
Senior Member
 
Night Sailor's Avatar
 
Name: Conrad
Trailer: Bigfoot 3000 & Barth "slide-in" truck camper
Connecticut
Posts: 963
Send a message via Skype™ to Night Sailor
Peter what sort of power output are you seeing with your roof punted panels? I the Sun and the shade?

And what do you pick up with the remote panels, which I presume are angled more perpendicular?

Any pictures?
__________________

__________________
Night Sailor is offline   Reply With Quote
Reply

Tags
solar, solar power


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
Solar power added to my scamp Joe N Modifications, Alterations and Updates 9 05-10-2010 10:29 AM
Getting started with Solar Power Anne3358 Problem Solving | Owners Helping Owners 7 02-19-2010 12:14 PM
Xantrex power pack with solar panel Daniel V. Modifications, Alterations and Updates 9 03-05-2008 09:26 AM
Residential Solar Power Mary F General Chat 13 10-22-2006 07:09 PM
Solar Power Andrew D Modifications, Alterations and Updates 9 08-20-2006 07:27 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 08:28 PM.


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