Re: [Electric Boats] ~40' Electric catamaran

 

Finding 144 volt solar charger will be hard.  But how about this instead use micro-inverters on each cell send the AC out thru your normal charger?   

On Sep 10, 2012, at 11:55 AM, Steve Dolan <sdolan@scannersllc.com> wrote:

 

Hi Colin,

Well you peaked my interest.

I assume you have a 420 Lagoon? If so they could initially be purchased with a 72V system. I'm just wondering if you had any experience with that system prior to going to the 144V system. You see I have a 410 SE with the Solomons Tech system running 144V. I also have a 16KW diesel genset which I wish was a little bigger only for maximizing the motors potential, I run at a max of 9KW at about 7-8 knots. I'm just wondering why you're running so big. I'm also running 12 AGM's at this time @ 200AH.

I'm not sure I understand why you're running diesels as backups. With a proper sized Genset you can run as long as you have fuel on board, probably longer than used as propulsion, since the genset usually gets better mileage. Are you then going to maintain the sail drives?

One thing I'm very interested in is a solar controller that can handle 144V output to the propulsion bank. Have you seen anything over there?

 

24" props…WOW!

 

Steve in Solomons MD

Lagoon 410 SE

 

Hi my name is Colin Freeman and I am in Darwin Australia. I am refitting a 42 Lagoon with electric drive and refer you to 

www.enstrol.si The EMRAX motor is 11.7 kg and can be used continually up to 40KW, peak 60kw with voltages up to 300volt. Several controllers  are avialable for this motor, see web site for details.I  am using Piktroniks SAC41 Water cooled units (www.piktronik.si) Slovenia.

 I am using 144 volt  160AH  life batteries and expect 25KW  per engine continuous, (water cooled) backed up with a 20hp al water cooled diesel weighing 55kg (gearbox also)  two units one in each hull.

46 solar panels @80 watts and two  Mppt solar controller with 5KW inverters  w soft start for in house operation. (air con). House battery 12 volt 1200AH,  144/12 volt dc/dc converters as well as solar and twin wind generators.

can assist with sourcing of all components if you need. I purchase direct from China manufacturers.

My lagoon currently weighs 13 tonne and will be 14 tonne when converted

Prop size is 24 inch RH 22 pitch 85 % area  three blade and expect a cruise speed of 10/11 knotts @ 1200 rpm on the motor

Hope this is of help to you I have been designing and chasing parts for two years as the work proceeds.

Good Sailing

On 07/09/2012, at 3:27 AM, R. Jason Adams wrote:

 

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