Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 31-03-2014, 02:40   #1
Registered User

Join Date: Mar 2014
Posts: 36
Is it this simple?

I traveled back and forth several times a day for five months with my dink using a C30 MinnKota, a 15 watt panel, an old fashioned shunt controller and a 35 AH AGM battery. Admittedly it was only several hundred feet to the boat and back but I never needed shore power to recharge the battery. This is all low tech and it worked fine. Is there any reason why this system can't be scaled up to a larger boat? Thanks.
__________________

__________________
sstuller is offline   Reply With Quote
Old 31-03-2014, 02:47   #2
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: Is it this simple?

Several hundred feet? Sure!
It's the longevity of the battery, and the recharge rate that'll get ya.
__________________

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 31-03-2014, 05:44   #3
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,577
Images: 240
Re: Is it this simple?

Greetings and welcome aboard the CF, sstuller.

The relationship between boat length and displacement (hence power required to drive it) is non-linear.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 31-03-2014, 06:03   #4
cruiser

Join Date: Dec 2013
Posts: 398
Re: Is it this simple?

Do you want to cruise to far off locations? Possibly motor for 72 hours to find safe harbor? Lagoon couldn't get it right with all their effort, not a good sign. I've considered going electric, but the life blood of my system would be a new diesel genset. Have unlimited range is what makes it a useful boat. Batteries and solar limit you to in and out of the harbor. Depends what your doing. I've travelled 3000 miles since oct. If I had waited for wind or solar I wouldn't have pulled it off. Are you a romantic sailor ghosting along or a traveling cruiser who wants to go places and see things.
__________________
Horror Hotel is offline   Reply With Quote
Old 31-03-2014, 06:10   #5
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,034
Re: Is it this simple?

Quote:
Originally Posted by sstuller View Post
Is there any reason why this system can't be scaled up to a larger boat? Thanks.
Two big things, available area of solar panels ( you'd almost have to tow a barge that was purely set up as a solar collector I think) and money. You'd spend millions replacing tens of thousands of dollars of Diesel fuel. But yes it could be done.
You would be surprised at how many people that thought the panel on the roof of some Prius, ran the air conditioner, where really it's all it can do to run a little computer fan to try to pull some of the hot air out of the car.
Available energy from a solar cell is actually quite small, so you have to be super efficient, and use very little energy and accept long re-charge times.
Your use for example, is your battery staying topped up, or are you slowly depleting it? Your use sounds like you could run for a month on battery only.
__________________
a64pilot is offline   Reply With Quote
Old 31-03-2014, 06:37   #6
Registered User

Join Date: Mar 2013
Boat: Hunter 41
Posts: 24
Re: Is it this simple?

A hybrid system with a very large diesel gen that can keep the boat running at cruise is the optimum scenario. To convert would cost far more up front than to replace an old engine and be on your way. I see Hunter is playing with a system but I don't know if any manufacturer is 100% commited to a "green" sailboat. There are a few third party electric engine manufactureres that can design a whole system for you but ohh the price.
__________________
uncledom is offline   Reply With Quote
Old 31-03-2014, 07:10   #7
Registered User

Join Date: Mar 2014
Posts: 36
Re: Is it this simple?

I bought the panel from Harbor Freight. It was secured to the pontoons of the inflatable with the battery box underneath. I was living aboard on a mooring at the time. It amazed me that I could travel between the dock and the mooring day after day, week after week, month after month with the MinnKota without a problem. It was one of the most reliable equipment systems I've ever had. Thanks.
__________________
sstuller is offline   Reply With Quote
Old 31-03-2014, 11:39   #8
Senior Cruiser
 
SkiprJohn's Avatar

Cruisers Forum Supporter

Join Date: May 2006
Location: Kea'au, Big Island, Hawaii
Boat: Cascade, Sloop, 42 - "Casual"
Posts: 14,192
Re: Is it this simple?

Quote:
Originally Posted by sstuller View Post
I traveled back and forth several times a day for five months with my dink using a C30 MinnKota, a 15 watt panel, an old fashioned shunt controller and a 35 AH AGM battery. Admittedly it was only several hundred feet to the boat and back but I never needed shore power to recharge the battery. This is all low tech and it worked fine. Is there any reason why this system can't be scaled up to a larger boat? Thanks.
Nope, no reason at all. Do a search for electric power here and you'll see long discussions on the subject.

Our club does the same thing for our International Marieholm Folkboat (26 footer). We used a larger MinnKota until we got a Torqeedo.
__________________

__________________
John
SkiprJohn 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
A Simple RF Ground Test GordMay Marine Electronics 15 21-06-2009 08:08
Simple Tranny question By Invitation Propellers & Drive Systems 5 29-06-2007 14:04
A simple, dumb question. Gator81 Multihull Sailboats 2 23-01-2007 13:58
My simple SAR experiance........ David_Old_Jersey Health, Safety & Related Gear 0 04-01-2007 13:28
Keep it simple Capt.[Retd.] John Bullock Meets & Greets 0 13-06-2003 16:34



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:20.


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.