Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 05-02-2015, 03:03   #46
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: [S]Hamble (Spring and Fall)[/S], Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 16,456
Originally Posted by BviKetch View Post
I am interested in your comment about a "school bus alternator" as an alternative to a genset. We recently removed our 5Kw genset (totally shot). We now have a wind turbine that meets about 50% of our charging need and we use our engine alternator for the rest. I understand that engine alternators are not suited for this and also that running our engine at idle with no load will result in Bore Polishing. Are you suggesting that a "school bus alternator" would work a lot better? And would that put enough additional load on the engine to reduce problems with Bore Polishing? We still have an electric stove that we plan on replacing with propane, but would the school bus alternator and a high capacity inverter be able to keep up with an electric stove (+/- 2400 watts)? Not having to install a propane system and a new stove would save a lot of money.
Thanks for your thoughts.
School bus type alternators (Leece-Neville et al) are made for bulk power production, and will stand up to continuous high output, high temp operation. They are bigger than car alternators so will charge faster (assuming proper external regulation) and load up your engine better.

You probably still don't want to run your main engine a lot with no other load, unless your engine is quite small. So, just check your dock lines and put it in gear while you're charging.

Dockhead is online now   Reply With Quote
Old 05-02-2015, 07:57   #47
Registered User

Join Date: Feb 2013
Location: WY / Currently in Hayes VA on the Chesapeake
Boat: Ocean Alexander, Ocean 44
Posts: 789
Re: Next question: best 6-8kw generator for use several hours daily?

Originally Posted by melissiti View Post
Cool, cheers - yeah, looks like a much smaller genset for backup & boat engine as main power source (on the many British rubbish-for-solar days that there are) is going to be our best bet. We won't need the genie on while cruising, no wind power for narrowboats, and the old towpaths (built alongside the canals in the 19th century so these boats could be towed by humans or horses, before there was any such thing as a built-in engine on them) are no longer fully functional - so we need to run the engine to move at all lol! And we'll need a proper cruise around once a week for supplies etc, so we can use that to charge up nicely as well as stretch the engine's legs. My primary reason for preferring a genset as main non-renewable power source, over the boat's own engine, was really noise concern. But I guess thoroughly soundproofing our engine bay makes that less of an issue Thanks for the smaller petrol(gas) genie recommendations!

It will take a MONSTER battery bank to go a week between charges. If you are thinking charge what you use each day (staying between 50-80%)and completely topping off the batteries once a week you are on the right path.

darylat8750 is offline   Reply With Quote
Old 05-02-2015, 07:59   #48
Registered User
Amapola's Avatar

Join Date: Sep 2011
Location: Florida
Boat: Matlack, Trawler, 48 ft
Posts: 788
Re: Next question: best 6-8kw generator for use several hours daily?

Northern Lights

My soul is full of longing for the secret of the sea,
and the heart of the great ocean sends a thrilling pulse through me.
—Henry Wadsworth Longfellow
Amapola is offline   Reply With Quote


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
8kw Mastervolt Generator sv Hope-Joy Electrical: Batteries, Generators & Solar 2 15-08-2013 12:19
For Sale: 8kw Generator smith401 Classifieds Archive 4 28-04-2013 09:52
For Sale: Northern Lights Generator Parts (8kw) H2OHOBO Classifieds Archive 0 15-08-2011 18:17
Average Refrigeration Daily Amp-Hours sailorboy1 Electrical: Batteries, Generators & Solar 11 11-03-2011 19:59
Problem with Westerbeke 3.8KW Generator Mike Sibley Electrical: Batteries, Generators & Solar 6 14-01-2009 04:37

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:12.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.