Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 03-06-2015, 11:51 AM   #15
Senior Member
GaryKD's Avatar
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
Hi larrydp (post 9),
If all connections to the negative terminal are completely removed there should be no parasite drain on the battery.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
GaryKD is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 03-06-2015, 12:17 PM   #16
Senior Member
larrydp's Avatar
Join Date: Aug 2010
Location: Jackson, MS
Posts: 239
As always, great info! Thanks!
Larry, Alice, and Halle (part-time watch dog)
Grayhawk 31 SS
larrydp is offline   Reply With Quote
Old 03-06-2015, 07:48 PM   #17
Senior Member
Join Date: Feb 2013
Posts: 211
I have a 15 watt battery minder solar trickle charger and its kept my house batteries up to snuff when the coach is stored, additionally it has kept the coach battery topped off via the ampl start. IMO a 7 watt solar panel should keep a healthy battery topped over unless the battery is weak, you have large parasitic loads or large periods of darkness.

aboatguy is offline   Reply With Quote
Old 03-07-2015, 06:26 AM   #18
Senior Member
Monaco Owners Club
Join Date: Nov 2013
Posts: 321
I wonder if it's possible that the panel doesnt have a blocking diode? Without it, it becomes the parasitic drain when it's dark out.

Blocking Diodes for Solar Panels

So you have seen an advert stating that you need this “blocking diode” thingy in your solar panel. You may be asking “What is a Blocking Diode?” and “Why don’t all panels have them?”
I will explain.
With solar panels, particularly 12v solar panels you can use them to charge a battery. Car battery, leisure battery etc.. If you connect a panel directly to the battery the energy will be collected from the sun and go into the battery as electricity. Great! Now the night time comes and the sun goes in. The 12v solar panel is still connected but not generating power. All the energy is in the battery and it wants to escape. The energy flow is now reversed and escapes out through the solar panel.
This is where a blocking diode is used. The diode is able to stop this backwards flow and ensures that the energy collected is safely stored.
Now you’re thinking, “Brilliant, I will just get a 12v solar panel with a blocking diode!”
Hold your horses..
This all sounds great but the reality is not that simple. In all solar installations there are other factors. Very rarely do you simply need to charge a battery that is not connected to anything. You use the battery to run some circuits and electrical equipment. Connecting a panel directly to a battery is not a good idea for many reasons. A charge controller is nearly always recommended.
Connecting directly (even through a diode) can over charge the battery and severely reduce its life. It can allow the battery to become very low and again severely reducing the life. If there are any other circuits on the battery these can affect or be affected by the unprotected panel resulting in a damaged panel or equipment.
Unless you are a trained in electronics always use a charge controller or regulator as it is sometimes referred. When you use a controller a diode is not necessary. This way your existing equipment, batteries and you newly purchased 12v solar panel charger will be protected and give you a long, reliable working life.
One last point, Do not confuse a Blocking Diode with a Bypass Diode

scep is offline   Reply With Quote
Old 03-07-2015, 07:08 AM   #19
Senior Member
Join Date: Feb 2015
Location: ct
Posts: 252
This is an interesting line of discussion! I read a couple of years ago that some company had invented a way of printing a solar panel which would reduce the cost to pennies. If that technology works it would make sense to me to print these and cover the whole damn roof of an RV with them. If so enough rv's in fl during the winter to power Miami
edsperfect is offline   Reply With Quote


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 battery trickle charger tomag Class C Motorhome Discussions 8 02-25-2015 04:01 PM
Chassis Battery solar charger ineffective, why? TinMan Trvlr Newmar Owner's Forum 32 09-17-2014 06:44 AM
Charger for Solar & Shore Power??? yourpcgeek49 General Discussion 12 08-16-2014 05:14 PM
Solar trickle charger bbc5 Palazzo Motorhomes 10 08-12-2014 10:29 PM
Solar Trickle Charger? Dave1956 Class C Motorhome Discussions 7 07-21-2014 07:36 AM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 04:05 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.