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Old 04-10-2012, 07:04   #1
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Join Date: Jul 2007
Location: Amstelveen Netherlands
Boat: FastCat 445 Green Motion
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lighter lithium batteries for green motion system

The green motion system will be equipped with lighter batteries with 20 % more usable amps.

The weight is down from 585 kilo to 369 kilo or a savings of 216 kilo with 4 Kw extra to use.
In practice this means that we have a extra hour to motor at 5 knots and the total weight of a GreenCat 445 is 3 % less.
We are presently developing a new 26 Kw DC generator with a total weight of 148 Kilo including the sound capsule or minus 100 kilo's .
This total weight saving will make the GreenCat 445 more efficient to sail and motor or it will raise the payload.
The development of the lighter batteries comes out of the EV ( electric vehicle ) market and the end for less weight is not in sight.
The previous units we used had a specific weight of 65 watt per kilo ( energy density ) while the new units are at 111 watt per kilo.
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