Electrical requirements - Page 2 - 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 > Electrical Systems
 Not a Member? 
  #11  
Old 03-07-2011
mitiempo's Avatar
Senior Member
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,110
Thanks: 0
Thanked 71 Times in 62 Posts
Rep Power: 8
mitiempo will become famous soon enough mitiempo will become famous soon enough
ext222

It would be my choice to use the generator to power the washer. If the generator was large enough it could also power an AC charger of some size. But a generator over 2000 watts is less common, more expensive and larger.

The best option for battery charging is a large alternator and a 3 stage external regulator. Any alt over about 100 amps needs 2 belts and a different than standard mount if you expect belts and mount to last. Something in the 150 amp or larger size dialed back by the reg to 80% for cooler running and longevity makes sense.
__________________
Brian
Living aboard in Victoria Harbour
Reply With Quote Share with Facebook
  #12  
Old 03-07-2011
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,960
Thanks: 10
Thanked 135 Times in 121 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
I don't have the specifics handy, but my genset recharges the house bank in much less time than the alternator of the main engine and the genset burns less than half the diesel per hour as well. Win-win.

I think that should be the analysis, rather than how to max the genset. As you've described, you are going to use solar/wind for your 12v recharge, which makes sense if you don't try to invert it back to 110v. Use the genset only every few days for wash or the occasional recharge. Much more efficient that running your main engine several hours per day, even when on the hook.
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #13  
Old 03-07-2011
Senior Member
 
Join Date: Jun 2004
Location: Malaysia
Posts: 314
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
haffiman37 is on a distinguished road
How big an alternator you may put on the engine will probably be limited by the load (side) you may put on the pulleys.(Check with Yanmar specs!)
Your charging requirements will at least demand a shaft driven alternator at the front vibration damper!
Reply With Quote Share with Facebook
  #14  
Old 03-07-2011
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 10 Times in 10 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
First, you really should install a battery monitor to get a more realistic idea of what you're really using on a daily basis. This will also give you a much more accurate basis for sizing your charging system and battery bank.

Reducing your usage is often far more cost-effective than increasing your battery bank size, since a larger battery bank will cost you more in fuel used, weight, etc.

I would point out that batteries are sized in AMP-HOURS, not amps, since amps are an instantaneous rating and really say nothing about the battery bank's actual capacity. The amp-hour rating that is generally used is the 20-hour rate.

Mitempo's advice about using the genset to power the washer is a good one, since it will put a lot less wear and tear on your batteries. If you do opt for a genset, it might make sense to get electrical refrigeration, rather than engine-driven refrigeration.

One caveat about the watermaker is that you should still carry enough water for you and your crew's needs, since watermakers can break. They also should not generally be used in populated harbors, since most are too polluted and will damage the RO membrane if you use the watermaker there. IIRC, the ORC racing rules say that you should carry one gallon per person per 100 miles of distance remaining on each passage at a minimum.

I'd recommend you read this article on Solar Power on Boats I wrote a while back.
__________________
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 Share with Facebook
  #15  
Old 03-15-2011
Senior Member
 
Join Date: Sep 2009
Location: Kingston Washington
Posts: 506
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 5
Waltthesalt is on a distinguished road
Something to think about is a battery monitor copled with a solar or better still a wind charger. With sun and trade winds, they should work well in the carribean. Wind chargers are more efficient but do have some noise. The issue is that the battery wants and the engine provides the high amp charging you metioned but then, after the "bulk cycle" the charging rate for the "absorbtion cycle" falls off to a long low charging rate., about 5% of the Amp Hr capacity. It's not great to run your engines like this but wind solar are optimum for long lower charging rates.
The battery monitor traks the amp hours out of and into the battery and would well suited to managing the battery operations you're planning.
Reply With Quote Share with Facebook
  #16  
Old 03-26-2011
billymoonlight's Avatar
Junior Member
 
Join Date: Mar 2011
Location: VA
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
billymoonlight is on a distinguished road
We have a Beneteau 50 and re did every thing. we put 800 amh with a seperate 200 amh start bat. 3-135watt solar and a wind gen plus a 6 kw genset. we also added two 12v frigobaot systems and kept the sea frost which we don't use much. we found fuel very expensive in the island. the solar and wind keep up withall our needs except the watermaker. They always pull more than they should . your washer and inverter will kill you batteries by discharging them too much too fast. hope this helps--billy
__________________
Regards--Bill
S/V Moonlight Serenade
Beneteau 50
Reply With Quote Share with Facebook
  #17  
Old 09-13-2011
Junior Member
 
Join Date: Mar 2011
Posts: 18
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ext222 is on a distinguished road
Responding to your response of several months ago as we have been delayed in getting started (old story I am sure) to allow our traveling companions to get their shore life in order. We are just now starting the upgrades.

It sounds like you have done everything to add resources and capacity that we plan to do.

Any idea what your total upgrade cost was? Anything you would change after using it for a while?

Thanks for the input!!

As a side note, I tried to ask the cost question in a PM, but am too junior here to have PM rights.
Reply With Quote Share with Facebook
  #18  
Old 09-26-2011
Junior Member
 
Join Date: Jun 2010
Location: Michigan
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
SeaDreamer1Day is on a distinguished road
A thought on clothes washing. Couldn't you just put your clothes in some sort of a net bag and drag them behind the boat. You would of course have to fresh water rinse them. Has anyone tried this?
Reply With Quote Share with Facebook
  #19  
Old 09-26-2011
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 8,960
Thanks: 10
Thanked 135 Times in 121 Posts
Rep Power: 6
Minnewaska will become famous soon enough Minnewaska will become famous soon enough
Quote:
Originally Posted by SeaDreamer1Day View Post
A thought on clothes washing. Couldn't you just put your clothes in some sort of a net bag and drag them behind the boat. You would of course have to fresh water rinse them. Has anyone tried this?
This has been known to be done by long term cruisers. They also often sail near naked. Could it be the cardboard clothing?
__________________

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

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Reply With Quote Share with Facebook
  #20  
Old 10-18-2011
Junior Member
 
Join Date: Oct 2011
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
tabrar is on a distinguished road
Solar system and battery bank

Hello.

I want to develop a system on solar that the load is 250 watt continous. the battery bank should support it to 2 day. can anyone guide me in it like the solar panel should i have it's ratting and about battery bank.

regards;
taqi abrar
Reply With Quote Share with Facebook
Reply


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
Charter Requirements in the BVIs TAK General Discussion (sailing related) 7 01-02-2010 08:41 PM
Dock line requirements davidpm Gear & Maintenance 15 09-23-2009 10:03 AM
Fire Extinguisher Requirements erps Gear & Maintenance 1 05-29-2008 12:54 PM
Electrical System requirements for Bahamas cruising Pelham Cruising & Liveaboard Forum 6 12-18-2006 08:57 AM
HP Motor Requirements natejount Gear & Maintenance 13 07-17-2003 11:19 AM


All times are GMT -4. The time now is 10:16 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.