Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-04-2009, 16:05   #1
Registered User
 
CapnTony's Avatar

Join Date: Jan 2008
Location: Texas
Boat: Irwin 325
Posts: 33
32 Watt Solar Panel

I have a chance to buy a Uni-solar 32 watt solar panel with controller for $100. I've read thru forums and can't seem to find if this wattage is enough to actually supply enough amps to do any good.

Any thoughts would be helpful.
__________________

__________________
CapnTony
S/V Drifters Reef
Aye, the creak of stout timbers and the slap of the waves, that there's a sound for ya'
CapnTony is offline   Reply With Quote
Old 04-04-2009, 16:56   #2
Registered User

Join Date: Feb 2009
Location: Missouri, USA
Boat: 17' Thistle and 13' Catboat
Posts: 28
At $3 per Watt that sounds very reasonable. Is it enough? For me it would be. If it produces 200 Wh per day, half of that directly consumed, half through battery (@ 75% battery efficiency) net production is approx. 175 Wh. Not much..... but enough to listen to marine radio (30 Wh per day), to have a few LED lights on for a few hours, to recharge your phone and MP3player, play your laptop PC for half an hour per day, but not more......
__________________

__________________
htraudes is offline   Reply With Quote
Old 04-04-2009, 17:55   #3
Registered User

Join Date: May 2003
Location: East Coast & Other Forums!
Posts: 913
32 watts will get you around 10 amp hours on a typical sunny day. Not much but you don't say WHY you want the panel or what you expect it to do for you so it is hard to comment.
__________________
Cam - I am no longer a member here. Look for me on other forums...same name.

camaraderie is offline   Reply With Quote
Old 04-04-2009, 18:07   #4
Marine Service Provider
 
GMac's Avatar

Join Date: Oct 2005
Location: North of the Bridge, thankfully
Boat: R930
Posts: 1,659
I got a 40W before Xmas and in average to good sun levels it can easily keep up with the fridge (one of those CF50 Wacos), all lights, keep laptop charged (DVD for the kids), radio, gentle stereo usage and instruments, not that we have a lot of those. Hard out stereo use I don't think so.

On a good day it's putting out 2.5-2.9amps according to the meter thingy. But then I haven't used it during a winter yet so that will be interesting. And we are a low power consumption boat.

I'd say a 32W would supply more than you may think especially on a full on sunny day. I must admit to being surprised how well my 40W does, I didn't expect quite it to keep up as well as it does. A Suntech out of China I think it is.

$100 with controller is very good. A good controller is a must have.
__________________
GMac is offline   Reply With Quote
Old 05-04-2009, 09:44   #5
Registered User

Join Date: May 2003
Location: East Coast & Other Forums!
Posts: 913
Yes...you DO need a regulator with that panel as output is 16.5V in full sunlight and it will fry your batteries without one. Even with the resulting 2 amp output in full sunlight...that gives you the ability to do ONE or two small things with it during full sunlight.
A basic car stereo will use 1-2 amps.
Auto pilot will use typically 4-6
VHF radio will use 1.5 on RECEIVE
As you can see...not too much in full sunlight.
__________________
Cam - I am no longer a member here. Look for me on other forums...same name.

camaraderie is offline   Reply With Quote
Old 05-04-2009, 11:23   #6
Registered User
 
Fishspearit's Avatar

Join Date: Jan 2006
Location: FL
Posts: 576
Quote:
Originally Posted by camaraderie View Post
VHF radio will use 1.5 on RECEIVE
Cam, you might want to replace that old tube radio you have, my new icom draws .2 A when receiving
__________________
www.LionfishHunting.com
Fishspearit is offline   Reply With Quote
Old 05-04-2009, 11:49   #7
Registered User
 
CapnTony's Avatar

Join Date: Jan 2008
Location: Texas
Boat: Irwin 325
Posts: 33
Thanks guys for the info. Picked it up this morning and got it for 80 bucks....felt like a deal.
__________________

__________________
CapnTony
S/V Drifters Reef
Aye, the creak of stout timbers and the slap of the waves, that there's a sound for ya'
CapnTony is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Does anyone have this solar panel? Chief Engineer Electrical: Batteries, Generators & Solar 7 25-04-2008 01:00
FS: (2) 85 watt Kryocera Solar Panels benjiwoodboat Classifieds Archive 15 30-10-2007 08:26
Which solar panel??? marno Electrical: Batteries, Generators & Solar 5 02-08-2007 23:09



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:03.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.