Thanks for your private message. I have no objection at all about posting
my reply on the open forum. I am all about sharing information where ever possible so others can learn and gain ideas and thereby provide the confidence in others to try out new electric motor
and battery technologies. I am fortunate to be at the forefront of these technologies (as far as lithium batteries are concerned) so I am more than happy to share my knowledge with others wherever possible.
So for the benefit of others first your message-
Thank you for your response. I went through the Torqeedo website. I had seen their motors before including the kayak model. Just had not looked at them. Thanks for the heads up. I can see their products in several projects we have on the boards.
Demand for electric power on vessels of all sizes in doing nothing but getting bigger.
I would love to see some photographs of your patrol boats. A very interesting concept
. Have a few questions like how big and how are they used? Where are you located?
I sent you the private message as I did not want to ask questions you might not want to have in the public forum.
I look forward to more contact with you.
John H. Jensen
Jensen Maritime Group
John the electric patrol boats are in the planning stages and the marine
architects have the drawings so there are no photos as yet since it is expected construction will start on the first boat in the next couple of months after the everything has been finalised. There have been ongoing changes to the design of the boats but basically they will be small twin engine
electric patrol boats 6m (20ft) in length for security
patrols at Sanctuary Cove here in Australia
. They will be powered by two Torqeedo Cruise
4 (48V 4000W) electric boat motors. The motors will be supplied power from 4x 48V 45Ah LiFeTech LiFePO4 batteries (model XPS2E-048045) connected in parallel so the total battery capacity per boat will be 48V 180Ah. The batteries will be fast charged from shore power
and we are looking at installing the fastest possible charger which is dependent on the power supply available. If the power is available we are looking at installing a 48V 8kW LiFePO4 charger so we can recharge in about 1 hour.
Claude from Torqeedo has calculated the patrolling time per charge will be around 6-8 hours depending on the motor power level. The Torqeedo motors are incredibly efficient and with low power
settings a comfortable cruising speed of 4-5 knots will allow all day patrolling. Of course if the opportunity arises to return to base for a lunch break etc. fast charging will allow the batteries to be topped up to capacity very quickly and so patrolling can resume again with a fully charged battery.
For anyone coming to Australia
next month I would urge you to visit the Sanctuary Cove International Boat Show
. The Sanctuary Cove Boat Show
is the largest and most prestigious boat show in Australia and one of the largest trade
boat shows in the Southern Hemisphere. A list of exhibiting companies at the boat show is on the boat show website here- Sanctuary Cove International Boat Show - 2010 Show
I personally am not exhibiting at the boatshow but will be attending and assisting at the Torqeedo stand. I am supplying some LiFePO4 batteries to Torqeedo which will power some of the motors on display as well as for the first time at this year's boat show visitors will be able to be taken for a cruise
in a couple of small electric boats which will be on display at the show. This should provide an insight for many people into the benefits of fume free, peace and quiet electric boating
(which many people who have tried this for the first time remark how relaxing it is).
If anyone is coming to the boat show be sure to come and say hi! I will be there each day of the show but will also be visiting my largest electric boat project to date "Roow With A View" which is a well known 55ft racing catamaran
which is normally based in the Great Barrier Reef
. RWAV is less than an hours drive from Sanctuary Cove and is in the final stages of a full electric conversion.
Rather than post photos and information here I think it is best to start a new thread. I am sure forum readers will find this project most interesting. There are many single
and twin Torqeedo powered electric boats but this is the only e-boat in Australia which will have triple Torqeedo motors fitted.