Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 16-12-2012, 13:04   #31
Registered User

Join Date: Sep 2009
Location: Mackay,QLD, Australia
Boat: planning a approx 45ft cat
Posts: 3,651
Images: 3
Re: High Output Alternators

Thanks Mainsail,

What I wanted to know.

Your how to website info is greatly appreciated.
__________________

__________________
downunder is offline   Reply With Quote
Old 16-12-2012, 13:23   #32
Registered User

Join Date: Dec 2012
Posts: 650
Re: High Output Alternators

Quote:
Originally Posted by Vasco View Post
I have a KISS wind generator and a Honda EU2000i. When I bought this boat (2004) solar panels were too expensive. They have come down now but I have yet to spend any time in a spot where I could get solar installed. I get down to the boat in FL, paint the bottom, throw it in the water and off I go. It is difficult to get any major work done when cruising and at the end of the season all I want to do is haul the boat and go home. I keep talking about getting solar panels though, maybe this season.
Can you install the solar panels (or have them installed) while your boat is at home on the hard?
__________________

__________________
mcarling is offline   Reply With Quote
Old 16-12-2012, 16:51   #33
Registered User

Join Date: Oct 2012
Location: Currently Tasmania after Pacific crossing
Boat: Catalina 42
Posts: 217
Re: High Output Alternators

Mainsail, In your photo I notice you have a large negative cable on the alternator casing. Where do you take this cable back to....the neg battery post directly?
__________________
Amnesia II is offline   Reply With Quote
Old 22-12-2012, 12:48   #34
Registered User
 
DevoDave's Avatar

Join Date: Nov 2009
Location: Circumnavigating Australia, currently Melbourne
Boat: Seawind 1160
Posts: 74
Re: High Output Alternators

Quote:
Originally Posted by Amnesia II View Post
Mainsail, In your photo I notice you have a large negative cable on the alternator casing. Where do you take this cable back to....the neg battery post directly?
The answer should be yes.
__________________
DevoDave is offline   Reply With Quote
Old 22-12-2012, 12:59   #35
Senior Cruiser
 
Vasco's Avatar

Cruisers Forum Supporter

Join Date: Apr 2004
Location: Toronto
Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
Posts: 7,133
Re: High Output Alternators

Quote:
Originally Posted by mcarling View Post
Can you install the solar panels (or have them installed) while your boat is at home on the hard?
No, I'm 1500 miles away and the boat is all covered up. I'd like to see it being done. Might stay someplace in FL for 2 weeks this year and see if I can get someone to do it.
__________________
Rick I
Toronto in summer, Bahamas in winter.
http://groups.yahoo.com/group/beneteau393/
Vasco is offline   Reply With Quote
Old 30-12-2012, 12:14   #36
Registered User
 
Bambolera's Avatar

Join Date: Nov 2012
Posts: 79
Re: High Output Alternators

I setup my own system with a high amp alternator. If I let the bank discharge too much, I have trouble starting the engine due to the load created by the alternator. I want to install a switch to the (field wire?) until the engine is up to speed before flipping the switch to start charging, but I've heard that the diodes can be damaged.

Somewhere in this thread, I read that a delay can be rigged. Can someone please tell me how this is done and/or discuss other options for engaging the alternator manually.

John
__________________
Bambolera is offline   Reply With Quote
Old 30-12-2012, 12:21   #37
Vendor
 
witzgall's Avatar

Cruisers Forum Supporter

Join Date: Oct 2006
Location: Eastern Shore, MD
Boat: Camper Nicholson 44 Ketch
Posts: 1,773
Re: High Output Alternators

If you happen to have a Balmar external regulator, it most likely can be setup to do this. Ours has a provision to setup a switch that will drop to output to a percentage charge, and you can set the percentage.

If you don't have an external regulator, then you should consider getting one, if you are using AGM, gels or LIFEPO4, as the alternators will tend to get quite hot running at high amps for extended periods of time, and will short-life the regulator.

Chris


Quote:
Originally Posted by Bambolera View Post
I setup my own system with a high amp alternator. If I let the bank discharge too much, I have trouble starting the engine due to the load created by the alternator. I want to install a switch to the (field wire?) until the engine is up to speed before flipping the switch to start charging, but I've heard that the diodes can be damaged.

Somewhere in this thread, I read that a delay can be rigged. Can someone please tell me how this is done and/or discuss other options for engaging the alternator manually.

John
__________________
witzgall is offline   Reply With Quote
Old 30-12-2012, 12:48   #38
Senior Cruiser
 
Blue Stocking's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,114
Re: High Output Alternators

Quote:
Originally Posted by Bambolera View Post
I setup my own system with a high amp alternator. If I let the bank discharge too much, I have trouble starting the engine due to the load created by the alternator. I want to install a switch to the (field wire?) until the engine is up to speed before flipping the switch to start charging, but I've heard that the diodes can be damaged.

Somewhere in this thread, I read that a delay can be rigged. Can someone please tell me how this is done and/or discuss other options for engaging the alternator manually.

John
AC Delco, (try truck part suppliers) make a heavy duty, oil pressure operated switch, normally Tee'd off the oil sender unit. Pass your field current through switch to delay alt load on engine.
Teleflex also make a NO/NC switch.
Quite common for dual alternators.
Most modern regs have a ramp-up delay built in.
__________________
so many projects--so little time !!
Blue Stocking is offline   Reply With Quote
Old 30-12-2012, 13:57   #39
Registered User
 
Bambolera's Avatar

Join Date: Nov 2012
Posts: 79
Re: High Output Alternators

I have a large frame Leece Neville truck alternator, rated at 130 amps. It's not marine equipment, but I've been using it for 11 years (full time cruising) and have never had a problem. The alternator has an external regulator (attached to the back) and can be adjusted for voltage by turning the set screw on the back.

There are three terminals on the back, which appear to be for adding equipment. Would this work for the oil temperature sensor? Wouldn't it be easier to wire in a manual switch and turn it on after the engine is running?

The attached link shows the alternator, now rated at 160 amps.

110-902-LEECE NEVILLE-ALTERNATOR
__________________
Bambolera is offline   Reply With Quote
Old 30-12-2012, 14:06   #40
Registered User
 
Bambolera's Avatar

Join Date: Nov 2012
Posts: 79
Re: High Output Alternators

This link has several good photos of the 130 amp model.

Leece Neville 8SA2035VA 12V 130Amp Alternator New | eBay
__________________
Bambolera is offline   Reply With Quote
Old 30-12-2012, 14:06   #41
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: High Output Alternators

With a high output alternator it is important to have a regulator that will ramp up the load. Otherwise you are going to be breaking alternator belts often.
__________________
DeepFrz is offline   Reply With Quote
Old 30-12-2012, 16:15   #42
Registered User

Join Date: Oct 2012
Location: Currently Tasmania after Pacific crossing
Boat: Catalina 42
Posts: 217
Re: High Output Alternators

Quote:
Originally Posted by Amnesia II View Post
Mainsail, In your photo I notice you have a large negative cable on the alternator casing. Where do you take this cable back to....the neg battery post directly?

The thing is, there is already a neg cable returning from the battery bank to the engine block. The alternator is securely bolted to the engine block so therefore is directly connected to the neg side of battery bank.

So what is the point of another neg battery cable returning as Mainsails photo shows?
__________________
Amnesia II is offline   Reply With Quote
Old 30-12-2012, 16:55   #43
Marine Service Provider
 
Maine Sail's Avatar

Join Date: Jan 2007
Location: Maine
Boat: CS-36T - Cupecoy
Posts: 3,060
Re: High Output Alternators

Quote:
Originally Posted by Amnesia II View Post
The thing is, there is already a neg cable returning from the battery bank to the engine block. The alternator is securely bolted to the engine block so therefore is directly connected to the neg side of battery bank.

So what is the point of another neg battery cable returning as Mainsails photo shows?
The point is that the "case ground" run though the engine block is a HORRIBLE way to get a hundred + amps back to the battery bank without suffering some serious voltage drop issues either now or in the near future.

Running an alternator through numerous different metals, that offer lower conductivity than copper, through pounds of rust, grease, corrosion and paint causes problems with HO alts. It actually causes just as many problems with factory alternators that don't have a way to "sense" and try to compensate for voltage drop....

It also causes issues with starter motors and I often run a neg wire directly to the ear of the starter not the opposite side of the engine block 18 different connection points away. The differences in the way the motor starts are often quite noticeable and dramatic...

I am the guy often called in to fix alts that suffer from voltage drop and the resultant chronic under charging that accompanies this voltage drop. More often than not the majority of the voltage drop is in the NEG side of the circuit but it is often a decent split especially with factory wiring...

I fix this by using the alts "isolated ground" terminal or I clean a good spot on the alt case when it is case grounded. I also use conductive terminal grease to maintain this connection. I lead a new wire, the same size as the POS, directly back to the bank or the load side of a shunt if so equipped.. There is a good reason HO alternators usually require a NEG cable the same size as the POS cable. Creating the most direct path back to the battery bank, on both sides of the circuit, results in the best alternator performance.

I often deal with & fix voltage drop issues by adding a new NEG cable the same size as the POS direct from the alt to the bank.. It is not uncommon to see a 1Ga POS wire and a 10GA NEG run through the factory wiring harness, to a rusty engine block, grease, corrosion, paint and multiple engine components before it gets to the cable that takes it back to the battery bank.

After this new cable has been installed I regularly see 90%+ of the current flowing though the new cable vs. the engine block path... The before and after is easily measured with a clamp meter. The path of least resistance is the best path when dealing with something as important as charging voltages and not allowing them to be eaten up though poor conductive paths..
__________________
Marine How To Articles
Maine Sail is online now   Reply With Quote
Old 30-12-2012, 17:02   #44
Registered User
 
Nicholson58's Avatar

Join Date: Jan 2011
Location: Live aboard
Boat: Camper & Nicholson58 Ketch - ROXY Traverse City, Michigan No.668283
Posts: 3,466
Images: 83
Re: High Output Alternators

If you need a large alternator go to a rebuild shop for alternotors and starters for class 8 and other big trucks. we had our 2KW alternotor rebuilt for 60 bucks. rebuilts for affordable prices.
__________________
Nicholson58 is offline   Reply With Quote
Old 30-12-2012, 17:32   #45
Registered User

Join Date: Oct 2012
Location: Currently Tasmania after Pacific crossing
Boat: Catalina 42
Posts: 217
Re: High Output Alternators

Mainsail, thankyou for your excellent response re the neg battery cable...I'm very much enlightened!
__________________

__________________
Amnesia II is offline   Reply With Quote
Reply

Tags
alternator

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
High Output Alternators - Look Out Balmar ! Jamel Electrical: Batteries, Generators & Solar 11 24-01-2012 22:05
No Autopilot Output tarkatoo OpenCPN 2 15-10-2011 17:35
High Outpur Alternator vs Wind Generator Strygaldwir Electrical: Batteries, Generators & Solar 90 15-10-2011 12:02
OpenCPN Version 2.4 Beta Build 628 bdbcat OpenCPN 63 15-07-2011 19:17
Problems Firing-Up OpenCPN jimbim OpenCPN 25 11-07-2011 14:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:56.


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.