Originally Posted by thorcat
Very interested in these electric drives,are you able to supply performance stats for them ,and size and type of gen sets to run them.
What range can you get out of them on battery
Size and type of batteries.
Lately there has been a lot of electric drives that hav'nt lived up to expectations,if you can make it work you will be onto a winner
Hallo Thorcat we have been working on the system since 2003 and have had yachts in the water
since 2008 and the Cat that was launched in 2009 has done in excess of 20.000 and besides tweaking, changing props for optimal speed while having good regeneration all is fine.
We use Lithium batteries , 25 Kw in the 44 ft cat and 50 Kw in the 61 ft cat and this is enough to cruise
for 8 hours ( 5 knots ) or 3 hours at 7 knots.
So far we have used Mastervolt units but we are looking to change to a battery with more power per kilo.
We use Polar power gensets en they are modified for us and made lighter with Aluminum
sound box to save weight, present weight for the 22 Kw unit 202 KG
we work with 160 V DC 160 Amps for the 44 ft and double that capacity for the 61 ft.
That is for propulsion
only, the House batteries also Lithium are 16 or 25 KW size depending.
You are right many have tried and so far the outcome was not good, the difference is that we start out with a efficient yacht and only use lightweight and efficient components made for us in order to go fossil fuel
Besides that we also make optimal use of solar
and wind power on the 61 ft 2400 Wp solar
power and a wind gen mast head
mounted of 400 watt nominal.
The complete boat is electric there is no gas on board,
Hallo Yves , yes prop for propulsion and for optimal regeneratin g are different, we have chosen a good in between prop, with the 44 ft cat we have a top speed of 8 kknots under power and a best regenerating at 10 Knots is 6 Kw per hour
The type of prop used for the 10 KW is a 3 blade
prop with a DAR of 54 % and the side and speed is 16 x 8 inch.