Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-09-2016, 00:43   #1
Registered User

Join Date: Nov 2015
Location: Singapore
Boat: Seawind 1160 Lite
Posts: 223
12 Volt Diving Compressor

I have been using my Bower Poseidon Dive compressor for some time now but sick of the Petrol motor.

Has anyone looked at converting their current petrol or 240 volt scuba tank compressors to work on 12 volts. ???

The below link is to a 10 hp , DC motor that should be capable of driving a compressor and can work from 6 volts to 48.



any feedback appreciated,

Andrew
__________________

__________________
Andrew Grace is offline   Reply With Quote
Old 05-09-2016, 01:06   #2
Registered User
 
ErikFinn's Avatar

Join Date: Feb 2011
Location: Malaysia, Thailand
Boat: Beneteau Oceanis 430
Posts: 715
Re: 12 Volt Diving Compressor

Bauer has 240V compressors. I can't remember specs but I reckon might be able to run from inverter.
__________________

__________________
ErikFinn is online now   Reply With Quote
Old 05-09-2016, 02:34   #3
Registered User

Join Date: Nov 2015
Location: Singapore
Boat: Seawind 1160 Lite
Posts: 223
Re: 12 Volt Diving Compressor

Quote:
Originally Posted by ErikFinn View Post
Bauer has 240V compressors. I can't remember specs but I reckon might be able to run from inverter.
The Bauer Junior 240 v needs a minimum 7KVA Genset to get started and does not start using an inverter.
__________________
Andrew Grace is offline   Reply With Quote
Old 05-09-2016, 03:10   #4
Registered User
 
ErikFinn's Avatar

Join Date: Feb 2011
Location: Malaysia, Thailand
Boat: Beneteau Oceanis 430
Posts: 715
Re: 12 Volt Diving Compressor

Quote:
Originally Posted by Andrew Grace View Post
The Bauer Junior 240 v needs a minimum 7KVA Genset to get started and does not start using an inverter.
How about adding a soft starter? Could it be done then?
__________________
ErikFinn is online now   Reply With Quote
Old 05-09-2016, 05:16   #5
Senior Cruiser
 
Captain Bill's Avatar

Cruisers Forum Supporter

Join Date: Apr 2008
Location: On the boat
Boat: Endeavourcat Sailcat 44
Posts: 2,168
Re: 12 Volt Diving Compressor

A 10 hp dc motor would draw almost 600 amps. Even if it only took 30 minutes to fill a tank that's 300 amp hours per tank of air. It would require a fully charged 600 amp hour LA bank for 1 scuba tank of air or 1200ah for 2 to avoid going below 50% SOC. You better have room for lots of batteries and a very nice charging system and some very large battery cables.
__________________
Captain Bill is offline   Reply With Quote
Old 05-09-2016, 09:45   #6
Registered User

Join Date: May 2016
Posts: 21
Re: 12 Volt Diving Compressor

meaning a compressor equals petrol engine or genset?
__________________
arbanais is offline   Reply With Quote
Old 05-09-2016, 09:56   #7
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jan 2016
Location: Ventura Harbor (OK, most of the time Canoga Park)
Boat: Catalina 30
Posts: 99
Re: 12 Volt Diving Compressor

Yes,, same as A/C, for the same reason. Compressors are heavy loads.
__________________
Brewgyver is offline   Reply With Quote
Old 05-09-2016, 10:19   #8
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 4,788
Re: 12 Volt Diving Compressor

If you have some kind of partner, to be politically correct, get a set of bellows and put them to work. You stand a better chance than a DC compressor.
__________________
Cadence is offline   Reply With Quote
Old 05-09-2016, 14:56   #9
Registered User

Join Date: Nov 2011
Boat: Hunter Cherubini 27
Posts: 90
Images: 1
Re: 12 Volt Diving Compressor

Change over to propane, all will be good
__________________
trapoc is offline   Reply With Quote
Old 05-09-2016, 15:42   #10
Registered User

Join Date: Jan 2011
Location: Sydney
Boat: Compass 28
Posts: 164
Re: 12 Volt Diving Compressor

Just use Hooka
__________________
Djarraluda is offline   Reply With Quote
Old 06-09-2016, 03:10   #11
Registered User

Join Date: Nov 2015
Location: Singapore
Boat: Seawind 1160 Lite
Posts: 223
Re: 12 Volt Diving Compressor

Quote:
Originally Posted by Captain Bill View Post
A 10 hp dc motor would draw almost 600 amps. Even if it only took 30 minutes to fill a tank that's 300 amp hours per tank of air. It would require a fully charged 600 amp hour LA bank for 1 scuba tank of air or 1200ah for 2 to avoid going below 50% SOC. You better have room for lots of batteries and a very nice charging system and some very large battery cables.
Sorry but I don't think you are quoting the correct data,

the specification sheets are showing that running at 50% (24v) its will generate 5HP of power which is plenty to drive the small bauer compressor and will draw only 100 Amps which is fine for filling a few tanks (it takes around 1/4 hour to fill one 90 cubic foot tank).

Manta II 10 HP DC Electric Motor 12 24 48 Etek Permanent Magnet with Mount BRK | eBay
__________________
Andrew Grace is offline   Reply With Quote
Old 06-09-2016, 04:50   #12
Mooderator
 
capngeo's Avatar

Cruisers Forum Supporter

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,118
Images: 12
Send a message via Yahoo to capngeo Send a message via Skype™ to capngeo
Re: 12 Volt Diving Compressor

Forget it! You would need more solar than the ISS!

Or you could use a wind genny
Attached Thumbnails
Click image for larger version

Name:	1421160063475.jpeg
Views:	41
Size:	28.5 KB
ID:	130699  
__________________
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 06-09-2016, 06:18   #13
Registered User
 
denverd0n's Avatar

Join Date: Jun 2008
Location: Tampa, FL
Posts: 3,566
Images: 6
Re: 12 Volt Diving Compressor

Quote:
Originally Posted by Andrew Grace View Post
the specification sheets are showing that running at 50% (24v) its will generate 5HP of power which is plenty to drive the small bauer compressor and will draw only 100 Amps...
One horsepower is equal to 745.7 watts. That means that 5 hp is 3728.5 watts. At 12 volts, that is 310+ amps. This is all assuming perfect, frictionless conversion, which of course is impossible. Hence it is going to be MORE amperage than that. Captain Bill was actually a bit conservative with his numbers, and his data IS correct.

Running the motor at 24 volts doesn't really change things--it just alters the volts versus amps equation, but you still need the same number of watts coming out of your battery bank. You still need a monstrous battery bank, and something to charge it with.

By the way, if the spec sheet actually says that it can generate 5hp on 100 amps at 24 volts then it is LYING! At 24 volts, 100 amps will produce less than 3.25 hp. Simple math, and inescapable physics.
__________________

__________________
denverd0n is offline   Reply With Quote
Reply

Tags
compressor, diving

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
Free Diving Legend is Lost While Diving Steady Hand Our Community 0 05-08-2015 08:25
Bauer Junior 2 Diving Compressor for Sale newbiesailor Commercial Posts 0 10-02-2012 20:18
Onboard Compressor for Painting, Diving, and Pneumatic Tools . . . ActiveCaptain Auxiliary Equipment & Dinghy 7 13-06-2011 16:49
L&W diving compressor pier Fishing, Recreation & Fun 0 21-11-2008 04:17


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- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 01:08.


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.