Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 10-10-2014, 07:33   #16
Registered User

Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 8,829
Re: Catamaran owners how are your alternators wired to charge the house?

Originally Posted by colemj View Post
Nothing specific there about NextStep - all external regulators that I have used do this. Even the ones that state they have special circuitry to prevent it. Best thing to do when fully charged is to turn on some amps.

Yes, that's their sometimes too.

Seems like building a simple circuit to continue to feed the tachs would not be hard, but its not found its way up my todo list yet...apparently not on Ample Power's either.

belizesailor is offline   Reply With Quote
Old 10-10-2014, 12:13   #17
Registered User
SeaKing's Avatar

Join Date: Jan 2006
Location: Shady Side, MD
Boat: Voyage 470 "SeaPaws II"
Posts: 509
Re: Catamaran owners how are your alternators wired to charge the house?

Originally Posted by yardie View Post
Thanks Dave.

I'll need to look again. There are a few solenoids down there. Outside of the factory bundle there are wires running everywhere as components were added and removed. I have a block of burned out knife fuses. no idea where they go nor what they do.

Our boat has 2 80amp alternators into 2 sterling digital regulators. I think they can be paralleled to the house bank. We did have an incident where both regulators went overvoltage and shutdown. Since they did it simultaneously I believe they are connected somehow.

Just check out Sterling powers website for their products, Sterling Power USA - Marine Battery Chargers, Marine Battery Isolators, DC to DC Waterproof Battery Charger, Advanced Alternator Regulators, IP68 Chargers, ProConnect Battery Relays, DC Powered Battery Chargers & Alternator Powered Battery Chargers

Call them and let them know what you have and I am sure they can advise on how to improve your charging. I was just looking into that but decided to just replace the bad regulator I have and continue operations as they have been as we are planning to sell the boat in the (hopefully near)future. I only just found out/ figured out that with both engines running only one is charging the batteries at a time because the second operating alternator will see the batteries as full due to the high voltage being put in by the first operating alternator and not charge at a high rate. That is solved by having another special box to run both alternator's charging thru to combine.

SeaKing is offline   Reply With Quote
Old 23-05-2015, 12:02   #18
Registered User
Sonosailor's Avatar

Join Date: Mar 2003
Location: Fredericton, NB, Canada in the summer and fall; Caribbean in winter and spring aboard Cat Tales.
Boat: FP Tobago 35 (and a H-21 SE)
Posts: 553
Images: 8
Re: Catamaran owners how are your alternators wired to charge the house?

Our Tobago 35 alternators are 55A, self-regulating. I switched them to feed directly to the house batteries via a single stud. At the stud, a feed goes to a diode block that splits to two lines at an advertised loss of .25V. These go to the two start batteries. I'd like to use only 1 start battery to start two engines, but when I wire it up the Yanmar control panels set off the alarm. Can't figure that one out!

Sonosailor is offline   Reply With Quote

alternator, catamaran

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
Using 2 alternators to charge a house bank cutlass Electrical: Batteries, Generators & Solar 38 25-04-2012 01:01
Wired Magazine / America's Cup 72s David M Multihull Sailboats 3 20-09-2011 05:00
Solar Panels Wired in Series / Parallel SailFastTri Electrical: Batteries, Generators & Solar 6 04-08-2010 06:51
Wired by a Kindergartner kb79 Electrical: Batteries, Generators & Solar 46 29-01-2010 16:56
Experience with loose wired anodes fastcat435 Electrical: Batteries, Generators & Solar 6 27-05-2008 23:33

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:34.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.