T-Pain Is On A Boat: RE: [Electric Boats] Project lagoon 410

So the story goes….

Lagoon was approached by Solomons Tech back in the early 2000's to install their system in the 410. The boats performed great even with the 12 lead acid batteries Lagoon provided. Then there was a shake up at Solomons and this gave Lagoon the opportunity to dump Solomons and go their own way. Solomons system was based on a 144V which went on to be installed in such manufactures as GunBoat and other smaller production boat manufactures. Lagoon decided that they were going to run a 72V system in the new 420, make it a fully automatic system and market it to the charter companies in the Carib. Well this didn't go as planned. Renters (who tend to motor more than sail) were burning up the propulsion packs, the Auto system didn't work right, and the Management companies down there didn't have the tech to fix them so they kept on breaking. The stock Lead acid batteries where failing do to the high cycle rate as well. To go along with this the 420 hull was designed around the batteries, wider and flatter. This didn't help the sailing ability so it was deemed a slow boat. The owners (those that put them in charter) of the boats were not happy, charter companies weren't happy, so Lagoon offered to retro fit the 420 with dyno motors. This got a really bad rap for Lagoon so no new boats were ever offered Electric. I have heard that there is a 440 and I think a 450 that are electric but don't think they are factory, Probably a Solomons retro fit.

As far as saildirves go I would get rid of it and go with a shaft. I've never heard anything good about saildrives and the amount of maintenance required (my opinion). A straight shaft is simple and requires minimum maintenance as well as simplicity to install electric drives.

Steve in Solomons MD

Lagoon 410 SE

From: electricboats@yahoogroups.com <electricboats@yahoogroups.com>
Sent: Wednesday, June 6, 2018 10:06 AM
To: electricboats@yahoogroups.com
Subject: Re: [Electric Boats] Project lagoon 410

Hi Steve

Thank for your message.

I heard about electric lagoon and the owners handed over diesel engines. What is the reason for this failure?

I'm sailing always with the wind, in the Caribbean, and i use engine only to go in or out marina or moorings. on rare exception i use engine when there is no wind.

I have solar panel (300w) and a D400 aerogen. I would like to exploit the regeneration under sail and put additional solar panels eventually.

I understand that a genset for security is necessary but i would like never use. My first idea is 10kw brushless (my wife said why not a 20kw), controller with regen fonction, and before reading you and 144V  I would 42V battery, type of battery not decided cause the price for now.

a problem for me to solve is how to put the electric motor on the SD20 saildrive?

Pascal

Guadeloupe

2018-06-06 8:46 GMT-04:00 'Steve Dolan' sdolan@scannersllc.com [electricboats] <electricboats@yahoogroups.com>:

[Attachment(s) from Steve Dolan included below]
Pascal,
I have 1 of the 3 Lagoon (2004) 410's built with Electric drives.
The system is no longer produced as a "kit" from Solomons Technologies but if there is anything I can help with just ask. I'm running LiPo4 batteries from CALB and a 144V system which I couldn't be happier with.. Here are a few things to consider.
Your going to need a 21KW GenSet for extended run times. This is enough AMPS to not only run at full speed under the genset but also charge the battery Pack at the same time.
With the LiPo4'S you will need a BMS. I'm using the ORION BMS with the Andromeda Display at the helm to monitor the batteries and motors.
Attached is a general system layout.
The ST74 motors put out 12HP per side. I do 6 to 7 knots.
In general a system like mine would run around $40K.

So it's not the least expensive system out there, I'm sure there are a few others that may be cheaper however I would go 144V for the low amp draw.

Hope that helps,

Steve in Solomon MD
Lagoon 410 SE

Hello

I would to change my olds yanmar 3GM30 (27hp) on my catamaran lagoon 410 (1998) by electric solution.

Who can help me to find the best and inexpensive solution, please.

Best regards

Pascal Morin
Guadeloupe

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Posted by: "Steve Dolan" <sdolan@scannersllc.com>

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