Solar battery chargers - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 04-05-2008
Izzy1414's Avatar
..........huh?..
 
Join Date: Apr 2007
Location: Grants Pass,OR
Posts: 395
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Izzy1414 is on a distinguished road
Solar battery chargers

Anyone with experience with solar battery chargers? I am charging two 12 volt deep cycle marine batteries. I am thinking flexible panel would be more practical. Is more output always better?
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 04-05-2008
Senior Member
 
Join Date: Aug 2003
Location: full time cruiser
Posts: 155
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 12
chuck5499 is on a distinguished road
solar panels

Izzy - not sure of what your power consumption is or what you are using the boat for but i can only tell you what i am doing
first - flexible panels are more expensive and can only provide smaller amounts of power vs the hard panels
second - i am in the process of outfitting a jeanneau ds40 for some long term cruising - i have 740+ amps of power from 6 golf cart batteries and one starter - i have a reefer and all the gadgets one needs plus a few - i am in the process of install 2 130 watt solar panels on my bimini top - i do not plan to use any wind generator nor do i have a genset - these should be able to more than keep up with my needs and if it gets cloudy for a few days i will run the iron genny that has a 160 amp alternator attached
- so in summary - what are trying to gain and how much power do think you need
chuck and svsoulmates
ki4sry
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 04-05-2008
Izzy1414's Avatar
..........huh?..
 
Join Date: Apr 2007
Location: Grants Pass,OR
Posts: 395
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Izzy1414 is on a distinguished road
Solar battery chargers

My power consumption is relatively small on our 26 foot pocket cruiser. Just depth sounder, stereo, nav lights, etc. There is just not that much chance to charge the batteries with the motor when the wind beckons.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 04-05-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
IZZY...welcome. It sounds like you are just looking to recharge your batteries during the week rather than have a charging system for daily cruising use. Correct?
Flexible panels are OK for such use but it is the wattage output of any panel that will matter. I suggest no smaller tha 20 watts for keeping batteries recharged during the week. To be of better help we need to know more about your use of the boat and the SIZE of the battery bank.
__________________
No longer posting. Reach me by PM!
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 04-05-2008
Izzy1414's Avatar
..........huh?..
 
Join Date: Apr 2007
Location: Grants Pass,OR
Posts: 395
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Izzy1414 is on a distinguished road
Solar battery chargers

We use our boat for a couple days at a time on a mountain lake with it moored on a ball in between uses. The down time ranges from several days (typical) to several weeks (unacceptable).
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 04-05-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Izzy...for on the mooring use a 20watt panel should put in 6-8 amp hours per day or roughly 30-40 amphours a week.
Your radio,cabin lights, anchor light, bilge pump etc. probably use about that many amp hours per day you are on board so 20 watts is really pretty minimal.
You can get a much more precise idea of your electrical use by clicking on the spreadsheet link on this page:
Southeast Marine Services :: Technical Information :: Battery Bank Sizing
Hope this helps.
__________________
No longer posting. Reach me by PM!
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 04-06-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Izzy-

The flexible panels are amorphous silicon and have a much lower power generation capacity than a hard polycrystalline panel of the same surface area. IMHO, you'd be better off getting a 40-60 Watt polycrystalline panel and mounting it. However, you may need a charge controller for a larger panel, but it depends on your battery bank size.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 04-06-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Dawg...are you saying that a 40 watt panel of amorphous does not give the same output as a 40 watt panel of poly? My understanding is that more AREA of panel is needed to produce the 40 watts from amorphous but that the output is the same (or slightly better in low light/low angle of incidence) with amorphous.
__________________
No longer posting. Reach me by PM!
Reply With Quote Quick reply to this message Share with Facebook
  #9  
Old 04-06-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
CAM-

That is why I said:

Quote:
much lower power generation capacity than a hard polycrystalline panel of the same surface area.
Many boats are going to have trouble finding the space required by a 40 Watt amorphous panel, but might be able to fit a 40 watt polycrystalline panel fairly easily.

A polycrystalline 40 Watt panel is about 26" x 21", where a 40 Watt amorphous silicon panel is going to be about 48" x 21"...almost twice as large.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.

Last edited by sailingdog; 04-06-2008 at 01:13 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #10  
Old 04-06-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
OK...so you're saying get a 40w poly panel instead of a 20w amorphous panel of the same surface area. No problem with that other than price and complexity of installation...but a longer life and more power too.
__________________
No longer posting. Reach me by PM!
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Installing a New Battery Bank Sue & Larry Gear and Maintenance Articles 0 09-26-2002 09:00 PM
Choosing and Installing Solar Panels Sue & Larry Gear and Maintenance Articles 0 11-06-2000 08:00 PM


All times are GMT -4. The time now is 03:47 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.