Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 10-01-2011, 01:09   #1
Registered User
 
Capn Morgan's Avatar

Join Date: Jul 2009
Location: South East Asia
Boat: Hans Christian 48T
Posts: 381
Genset and Compressor

I would like to be able to run a dive compressor with my genset. The time has come to chose the size of the genset and I am torn between the 5 and 7 KVa units from Northern Lights. I don't seem to be able to load any more than about 20 amps at 220V so the 5 KVa one should work. However, due to the start load of the compressors, I don't even know if the 7 KVa one will do the job. The dive compressor I have in mind is a Bauer Junior, has anyone got any experience with this combination they would want to share?

Also, I need to apologize for my ignorance. I posted this comment on another thread but I can not find it and it does not show anywhere. Sorry...

Cheers!
__________________

__________________
Capn Morgan
'If you can fill the unforgiving minute with sixty seconds' worth of distance run...'
Capn Morgan is offline   Reply With Quote
Old 10-01-2011, 05:06   #2
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,579
Images: 240
Quote:
Originally Posted by Capn Morgan View Post
... I posted this comment on another thread but I can not find it and it does not show anywhere.
Cheers!
Here ➥ Generator vs Inverter Generator (Genset)
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 10-01-2011, 05:35   #3
Mooderator
 
capngeo's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,211
Images: 12
Send a message via Yahoo to capngeo Send a message via Skype™ to capngeo
Cap..... Many generators have surge capacity for starting loads. Typically the small diesel sets have a HUGE flywheel and the generator end is "usually" of a larger capacity than advertised. Often unfortunately, the exact specs are unavailable from the manufacturer... BUT if you can find a good service tech who is familiar with the unit you are looking at, they should have actual load experience for that set.

I have a 2.2kw Phasor, which will start 5000w loads!
__________________
Any fool with a big enough checkbook can BUY a boat; it takes a SPECIAL type of fool to build his own! -Capngeo
capngeo is offline   Reply With Quote
Old 10-01-2011, 08:21   #4
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,150
There is no need to guess on this. Find out from the manufacturer of the dive compressor what they recommend. I would imagine their compressors have been put on plenty of boats. Ask them what worked and what might not have worked.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 10-01-2011, 08:40   #5
Elvish meaning 'Far-Wanderer'
 
Palarran's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: Me - Michigan / Boat - Tenerife
Boat: 56' Fountaine Pajot Marquises
Posts: 2,641
I have an 8kva Northern Lights that runs a Bauer Junior. No idea about the 5.
__________________
Not all who wander are lost

http://www.sailblogs.com/member/palarran/
Palarran is offline   Reply With Quote
Old 11-01-2011, 00:42   #6
Registered User
 
Capn Morgan's Avatar

Join Date: Jul 2009
Location: South East Asia
Boat: Hans Christian 48T
Posts: 381
Outstanding! Thank you.

Gord, thanks, found the other thread with your link.

George, it is good to know, but I'm not keen on buying a new g'set and overloading it from day one with a compressor. More out of fear for the invoice than anything else, you understand.

David, Bauer publish the loads for both start and running. The small g'set theoretically won't do the job but it should have no problem while running. A friend told me he started a Coltri with a 4.5 KVa one but then these compressors have trickery that allows to start it without load.

Palarran, thanks, I think that unit is the same one as the 7KVa. It gives this lower rating at 1500 RPM/50Hz/220V.

As discussed in other threads, my main reason for wanting the smaller unit is to be able to load it to about 75/80 percent when I run it. My current 12KVa unit suffers because I just don't have enough loads to bring it to past 40 percent and most of the time half that. It weighs 200 pounds more and burns double the diesel.
__________________
Capn Morgan
'If you can fill the unforgiving minute with sixty seconds' worth of distance run...'
Capn Morgan is offline   Reply With Quote
Old 11-01-2011, 03:28   #7
Registered User

Join Date: Sep 2009
Location: Mackay,QLD, Australia
Boat: planning a approx 45ft cat
Posts: 3,651
Images: 3
Cpth Morgan

you should get away with the 5.5 kw genset with a Vitron Quattro inverter/charger with 5kw boost for starting should do the job with other side benefits.

Victron Energy - Inverter/chargers - Inverters - Battery Chargers - and more

As Gord May suggested Vitron has the solution. Also check out vitron's generator test link from that page and you will see the solution.

Marine Generator Test - Victron Energy
__________________
downunder is offline   Reply With Quote
Old 11-01-2011, 03:32   #8
Registered User

Join Date: Sep 2009
Location: Mackay,QLD, Australia
Boat: planning a approx 45ft cat
Posts: 3,651
Images: 3
Cpth Morgan

the attached link is good info on advantages of the smaller genset/Vitron route


From My Design to My Installation: New AC Power System
__________________

__________________
downunder is offline   Reply With Quote
Reply

Tags
compressor

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
Compressor on Board Gisle Fishing, Recreation & Fun 31 13-12-2010 10:15
Compressor Problem gbendaly Plumbing Systems and Fixtures 10 30-09-2009 11:22
A/C Compressor Sweating PaulM Plumbing Systems and Fixtures 4 28-07-2009 11:09
Fridge compressor Albro359 Electrical: Batteries, Generators & Solar 3 21-07-2009 06:46
Compressor gone bad Minitee Plumbing Systems and Fixtures 3 22-08-2007 03:14



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:32.


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.