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Old 29-04-2010, 07:30   #16
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Originally Posted by JusDreaming View Post
I would like to get back to 100% if possible, and it takes about all day to get the power back. ANd yes we have an MPPT controller
Well you do understand I assume that the more charged the batteries are the harder/longer it takes to get a little more charge in. Depending on battery type and your charging system it could take longer to get from 90% to 100% as it would take to get from 60% to 90%.

This is why a lot of cruisers run their batteries in a range like 60% to 90% for example. That allows charging in the range where the batteries can safely take the most/fastest charge in the least time. So you balance charge in the battery vs time, energy and hardware it takes to charge them.

Of course if you have the capacity to reach 100% that's a good thing but if you can regularly charge the batteries to 90-95% and occasionally top them off to 100% and also occasionally equalize then I think you are good. To get that last 10% every single day you are in the range of diminishing returns in terms of additional panels, wind, engine time, money, etc to get there.
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Old 29-04-2010, 23:05   #17
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and they are politically considered Caribbean
Not by any cruising guide or cruiser that I have read. Please provide a source for this. The Caribbean Sea is far, far away (at trawler or sailboat speed) from the Bahamas.

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Roughly 1/4 the Bahamas islands are in the “tropical”
Yes and that portion of the Bahamas is primarily uninhabited islands, cays and sand spits; e.g., the Jumentos, Crooked Island, Acklins Island that see very few cruisers unless they are enroute to the Eastern Caribean. Most cruisers will cruise the Abacos, the Exumas or the Family Islands. All above 23.5 N, all sub-tropical, and...here was the point... outside of the trade winds.

Agreeing with SloMotion; If a cruiser is going to go to the Bahamas in the Spring when the islands are still affected by the Northers coming off the NA Continent, then a wind generator makes sense. If said cruiser is going over in the March/April timeframe or later, save your money.

If the cruiser is going to the Caribbean, specifically the Eastern Caribbean chain, then he will start gaining real benefit from a wind generator at about 20 N off the coast of the Dominican Republic. He will also have his head handed to him if he doesn't use all of the tricks of the trade to traverse the "Thorny Path".

Hope this helps and clarifies.
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Old 30-04-2010, 06:03   #18
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The Caribbean Community and Common Market (CARICOM) was established on August 1, 1973, by the Treaty of Chaguaramas.
The Bahamas became the 13th Member State of the Community on July 4, 1983.

CARICOM ➥ CARIBBEAN COMMUNITY (CARICOM) SECRETARIAT - HOME
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Old 30-04-2010, 06:25   #19
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We use a KISS wind generator, and while at anchor. Many fellow cruisers stop by to ask it's brand, because it is so quiet. I am just now starting to install 2X185 panels. We are figuring in the night the wind generator will keep the batteries from falling too quickly........i2f
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Old 30-04-2010, 07:10   #20
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The Caribbean Community and Common Market (CARICOM) was established on August 1, 1973, by the Treaty of Chaguaramas.
And I learn something new everyday. Thanks.

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Old 30-04-2010, 07:31   #21
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Denny,

Increase your bank to 600 amps, that's what I did from the old 400 I had. A great improvement . Most of the time while cruising (or at anchor which Bahamas cruising is ) you're using the band between 50% and 85 % so you've got about 200 amps to work with before recharge. About two days of relatively light usage. I just use a KISS and a Honda EU2000i when the wind fails me. If you're looking for new batteries have a look at Trojan's new 12v batteries, think they're T1275. 150 amps a piece and 12v.
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Old 30-04-2010, 07:37   #22
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Denny,

Increase your bank to 600 amps, that's what I did from the old 400 I had. A great improvement . Most of the time while cruising (or at anchor which Bahamas cruising is ) you're using the band between 50% and 85 % so you've got about 200 amps to work with before recharge. About two days of relatively light usage. I just use a KISS and a Honda EU2000i when the wind fails me. If you're looking for new batteries have a look at Trojan's new 12v batteries, think they're T1275. 150 amps a piece and 12v.
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Old 30-04-2010, 11:45   #23
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I also make the distinction between the Bahamas and the Caribbean. It's not just culture and economics vs. geography. For sailboat cruisers it's an important distinction, at least if they're starting out in Florida. Charlie and I will not be moved.

We also had a KISS and I swear by them. I didn't do any research, I just bought it because several experienced cruisers recommended it. They require a little more room to mount - so that you don't decapitate anyone. But they are very quiet compared to what I heard from neighboring boats. AND they put out gobs of power - just 2 or 3 amps starting at about 10 knots, but then they skyrocket to about 20 amps at 20 knots and just keep going up. We did have to add a rubber block to the mounting pole to keep the aft cabin from humming - it was a Hunter.
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Old 30-04-2010, 12:17   #24
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How much more power do you think you get per degree of latitude? Per 10 degrees may bee better...
See: Insolation ( input of solar energy) as a Function of Latitude and Season
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Old 30-04-2010, 12:44   #25
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Very cool, Gord. Since we're not too far from the equinox, it looks like Mark's solar efficiency is off close to 20% compared to Malaysia. Presumably, he will get some of that back as we approach the solstice.
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Old 30-04-2010, 12:47   #26
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How the hell do you find this stuff, Gord?!

Interesting thing, if I am reading it right, it that there is very little extra hitting the solar pannel in the 20 degrees closest to the equator, even from 30 degrees up theres not that much.

Interesting read, especially about the north pole

Thanks, Gord!


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