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12 volt power supplied

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colincooper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colincooper Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2006 at 20:14

Amendment to the above.  After tracing the wires on the 370 (why don't we get a decent electrical diagram ) .... the 2 extra batteries are seperate.  That is, if you order the extra batteries, you end up with 220 AH for the domestic and 110 for the anchor winch.  The 90AH for the engine remains unchanged.

Personally, I'm considering bridging the anchor and domestic curcuits.  But then I don't anchor that much.

Colin (owner of Hilde - a 370)
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Popeye View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Popeye Quote  Post ReplyReply Direct Link To This Post Posted: 12 April 2006 at 09:32

I ordered my Hanse without anchor winches or electric winches, but did order the "big" battery pack. Therefore I have (of course) one battery for the engine, and a triple bank for the house batteries. Totally crammed full under the seat.

I have installed anchor winches (or windlasses) myself at each end of the boat, and have routed 35mm2 cabling (a nightmare job!!) to the battery box. I have connected them to the engine battery, which is the recommendation from all winch suppliers (and producers) here in Norway. The idea is that the engine is always running when anchoring, therefore plenty of recharging power.

The deep current draw from the battery when using the winches is akin to the deep draw from a starter motor, and the engine battery is designed for this kind of current drain. The service batteries (house) are not designed for deep current draw, but rather for small currents over a long period of time.

Batteries are not just the rated Ah capacity, but also the profile of the capacity. Key words are also Cold Crank capacity, which should be high for a engine or winch battery.

 

Popeye the sailorman
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Hutschlange View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hutschlange Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2006 at 05:57
Do you know if its possible to upgrade from 60A to 80A alternator via Hanse shipyard. 80 Amps is an option from Yanmar.
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gertha View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gertha Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2006 at 20:37

Dear Hutsch..........,

Tried this one , no Hanse fit only 60A.

The U.K. agent has a deal with the Yanmar agent and swaps them as new.

Personaly I am going to keep the supplied 60Amp alternator as a spare and fit a 100 amp Balmar with a smart charger as this will give max charge, if I find that the engine is not giving full power in an emergency then I will turn off the house bank , although this is very unlikely as I have never found a time to run  a boat engine at full revs.

The other problem is the belt to drive the alternator will be under a large load, so will start with a few spares and if a problem will get local enginer to fabricate better pulleys.

Simon

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colincooper View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote colincooper Quote  Post ReplyReply Direct Link To This Post Posted: 13 April 2006 at 22:50

The other side of the charging equation is that the recommended charging rate for lead-acid batteries is about 10% per hour.  That is, for a 100AH battery at 10 amps maximum.  This preserves the life of the battery.  Anything above that reduces the life of the battery.

Although smart regulators make sense to ensure a battery is fully charged (and hence extend its life) I'm not so sure bigger alternators are always a good idea.  That doesn't say they don't have their place: if you are spending many nights away from shore power and have a need to minimise engine running for example.

You really need to consider your anticipated use of power vs. methods of charging.  Bigger isn't always better.

Colin (owner of Hilde - a 370)
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Linka View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Linka Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2006 at 18:44

Hello,

Did anyone consider the Sterling Power PRO Digital alternator regulator?

Luc

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