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11-04-2013, 12:36
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#31
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Registered User
Join Date: May 2010
Location: some ocean down under
Boat: Kelsall Suncat 40
Posts: 1,248
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Quote:
Originally Posted by Dsanduril
Here's how I look at the math:
Solar panels are about $1/Watt. With batteries and installation about $2/Watt (and that's pretty low, assumes self install, etc.).
Typical solar production is around 5x nameplate (with considerable variation). So 1W solar will produce about 5 Wh/day and costs about $2 installed = $0.40/Wh/day.
A 15W running light/anchor light for 10 hours/day takes 150 Wh/day, which equates to about $60 in solar installation costs ($30 just for the panels). If you can replace that 15W with a 1W LED (10 Wh/day, $4 solar installation cost) for less than $56 ($28 if you only count the panel costs) then it makes sense to install the LED. If the LED is more than $56 then it makes more sense to install the solar to feed the incandescent (providing you have the room to install the panels).
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All very true. For the simplified case of 1 light, with panel capacity that is ONLY used for that one light.
Now repeat the exercise for 10 lights and assume that a maximum of three lights will be working at any one time. This better reflects the reality on a cruising boat and the result will be of great benefit to all those analyzing where to best spend their $$.
__________________
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11-04-2013, 13:00
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#32
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
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Re: Solar Panels or a Wind Generator
If you have the room for all solar, go for it. We don't have room for all solar, so a combination works for us.
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11-04-2013, 19:34
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#33
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Registered User
Join Date: Aug 2011
Location: Atlantic City, NJ
Boat: Beneteau 49
Posts: 81
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Re: Solar Panels or a Wind Generator
I really appreciate everyone's responses. I have a couple more questions.
I am having an arch designed and I have an option for a mount to be installed now so a wind generator could easily be installed at a later date. The arch gives me about 11' of width to mount solar panels. I don't have much experience with solar yet, but looking at a site for a sample panel, I should be able to mount 6 panels for a total of 4 to 500 watts. Does that seem accurate? What sites would you recommend for solar panels? I will be doing the installation myself.
As far as the wind generator, I'll get the mounting plate installed so I'll have that option available if the solar is coming up short.
Thanks,
George
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11-04-2013, 20:49
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#34
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Registered User
Join Date: May 2007
Location: On the hard due to wife's medical condition.
Boat: Sold, alas, because life happens.
Posts: 1,829
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Re: Solar Panels or a Wind Generator
Quote:
Originally Posted by georgec
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Cost effective? Solar beats wind.
Maintenance? Solar = zero. Wind = some. Blades get bird-struck; bearings wear out, etc.
Practical applications? Depends on the wxr and vessel location. (High seas or anchored within the high walls of a dead volcano... etc.)
Clouds/shadows hurt solar; wind comes and goes. Having both helps.
We installed solar then added wind turbine about a year later for the added pwr when overcast or at night. We haven't used shore power or a genset since March 2009, and don't run the main motor for charging purposes. If the solar/wind setup gets to limping along in cloudy windless times, then it's best to fire up the oil lamps and maybe turn to a bit of romance...
__________________
"Being offended is not the same thing as being right." Dave Barry.
Laughter is the salve that keeps reality from scaring.
¯\_(ツ)_/¯
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11-04-2013, 22:02
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#35
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Registered User
Join Date: Mar 2007
Location: Santa Cruz
Boat: SAnta Cruz 27
Posts: 6,711
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Re: Solar Panels or a Wind Generator
Quote:
Originally Posted by Don L
I agree, but turns out the cost of the panel isn't the main cost. This is the cost the past 2 months to install a 290W panel on my boat (yes I could have spent 4 times the cost of the 290W panel on 2 140W panels and used a cheaper PWM controller, but ...)
solar project 290W panel $ 279.99 electrical $ 907.97 mountings $ 392.93 finishing $ 31.00 $1,611.89
But I think wind would cost at least as much total project
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Yes, you have to mount and hook up the wind gen as well. Wondering if you might have been better off buying more panels and spending less on the controller...
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11-04-2013, 23:43
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#36
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Registered User
Join Date: Sep 2009
Location: on board, Australia
Boat: 11meter Power catamaran
Posts: 3,648
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Re: Solar Panels or a Wind Generator
Quote:
Originally Posted by SURV69
I understand the comforts of home, but this would be like taking a Winebago camping and expecting the camping experience.
Honestly, to begin with a person needs a 35-40 boat to approach the comforts of home.
Keep it as simple as possible, while still being, at least somewhat comfortable.
Part of the experience is the "hardship"(if I can really use that word), of the sojourn. The metal in one's heart and soul . . . even just a little bit.
For the others I say buy a floating house and have towed.
I have never heard fond memories of excursions that were perfect and un-eventful, but virtually everyone remembers, with heartfelt fondness, the excursions where they endured some degree of hardship.
Forget the electric stove, get a simple cooler, get oil lamps, change out to LED's, keep simple and get to know yourself.
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SURV69 You are not answering the OP's question.
He has a 49ft Beni and genset/1000ah batteries and is seeking advise on relative merits of solar vs Wind gen.
Georgec, I would fit as much solar as possible 500/750 ah first and then consider if Wind gen is necessary.
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11-04-2013, 23:55
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#37
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Registered User
Join Date: Sep 2009
Location: on board, Australia
Boat: 11meter Power catamaran
Posts: 3,648
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Re: Solar Panels or a Wind Generator
Quote:
Originally Posted by georgec
I really appreciate everyone's responses. I have a couple more questions.
I am having an arch designed and I have an option for a mount to be installed now so a wind generator could easily be installed at a later date. The arch gives me about 11' of width to mount solar panels. I don't have much experience with solar yet, but looking at a site for a sample panel, I should be able to mount 6 panels for a total of 4 to 500 watts. Does that seem accurate? What sites would you recommend for solar panels? I will be doing the installation myself.
As far as the wind generator, I'll get the mounting plate installed so I'll have that option available if the solar is coming up short.
Thanks,
George
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Perhaps get your solar panels first and build the arch to suit maximing ah.
I would be looking at larger panels. say 3x250ah or 2x340ah.
Check out this link for a good adjustable install. Although a catamaran install the principle could be adapted for a Ben 49.
http://www.cruisersforum.com/forums/...lar-99976.html
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12-04-2013, 00:12
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#38
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Registered User
Join Date: Mar 2012
Location: On board in Leros, Greece
Boat: Hunter Legend 420 Passage
Posts: 863
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Re: Solar Panels or a Wind Generator
Quote:
Originally Posted by georgec
....I am having an arch designed and I have an option for a mount to be installed now so a wind generator could easily be installed at a later date....
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Don't put the wind generator on the arch anywhere need the solar panels because that will cause shade and reduce their output.
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12-04-2013, 05:29
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#39
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Registered User
Join Date: Mar 2008
Location: Huron, Ohio
Boat: Albin Coronado 35(1972)
Posts: 640
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Re: Solar Panels or a Wind Generator
Jimbo485:
I don't shop West Marine for LED lights, but at $1k for led lights it sounds like you may have.
Switching out to led's for me amounted to $50 for enough high powered led's for inside and another $50 to go led's for nav lights.
Of course I actually make my own Nav lights and all . . . I like the more personal touch.
As everything goes, buying ready to go kits from a marine outfitter costs a lot more and very often, the systems aren't even salt-water resistant.
I'm in fresh water(Lake Erie), and that alone opens up all kinds of opportunity to me that a saltee can't chance.
As I said, I like making my own stuff . . . building it . . . molding it . . . whatever and I'm the quality control on my equipment . . . 1:1 quality control.
If I ever make it to the salt for a winter, you guys can hear my sad tale of how my equipment succumbed to the salt or how my equipment was adequately protected from the salt.
In any case, with a little enginuity(sp), all the components can be had much cheaper and most of it can be made much less prone to the hardships of the marine environment.
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12-04-2013, 05:36
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#40
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Registered User
Join Date: Mar 2008
Location: Huron, Ohio
Boat: Albin Coronado 35(1972)
Posts: 640
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Re: Solar Panels or a Wind Generator
Downunder:
Well, I'll be.....
Somehow I got this thread mixed up with the Bristol 24 thread.
Heart meds sometimes gets me a little lost . . . anyway, it's my excuse.
AS Lilly Thomlin always said.....................Nevermind.............
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