[Attachment(s) from James Lambden included below] Hi Dominic,
An Electric Propulsion System when installed properly to high standards will always be much more reliable than a diesel. A hybrid system will also be more reliable as the diesel operates at perfect conditions all of the time.
Electroprop's Plus System is a completely isolated ground system with Ground Fault Monitoring and ideal for a metal boat.
You should also concern yourself with the AC system which should have an isolation transformer if used on a steel vessel. We prefer the Mastervolt Isolation transformers as they have fault monitoring. They are much lighter than transformer based isolation transformers.
We can custom build a 400 amp hour Lithium Battery Pack. We require professional installation of any Lithium product that we sell. Be careful with Lithium. You have to remember that even the safest Lithium Iron Phosphate still has a flammable electrolyte, controlled by a computer. We would prefer if you built your system with Pure Lead Batteries. Pure Lead is inherently safe. Our Plus System features the first marine Battery Management System for Lead Acid Batteries. Pure Lead Batteries are much less money and the performance is more than you need for a hybrid system.
Our complete packages include everything that you need for a conversion.
Our 21 KW Electroprop Voyager is rated as 21 KW continuous.
Motors build power from rpm and torque. The Voyager operates at 4500 rpm through a planetary gear set. This allows the motor to run cooler, with much higher efficiency which translates into better range. We run at 96 volts so we can build a full 21 KW Hybrid. The Voyager is the highest power, highest efficiency electric propulsion motor at this power level.
At 48 volts, 200 amps, your generator would be limited to 10 KW. We can build a 10 KW 48 volt generator for the Electric Yacht motor with our Plus Energy System. Any system with a generator requires very close monitoring of the battery bank for safety reasons. Generally speaking any issue that you would have with a properly sized battery pack will occur during charging so building a hybrid is much different from building strictly plug in electric.
Thanks,
James
James Lambden
The Electric Propeller Company
625C East Haley Street,
Santa Barbara, CA
93103
805 455 8444
james@electroprop.com
www.electroprop.com
I am in the process of evaluating EP instead of a Beta Marine 38hp for a VIA 42 aluminum sailboat. The long term plan is to sail around the world, but the nagging question is, are the systems reliable enough?
For those of you who have done the conversion, would you be comfortable cruising for a few years or 5?
Have any of you been dead in the water? What failed?
The current idea is Electric Yacht 20kv, 400ah LiFePo battery bank and DC genset.
On a steep learning curve and just looking for things to think about.
Since it is a metal boat, are there grounding issues with the motors? Are they all isolated ground or is that something to deal with?
Anyone know if Keith Redfield's Aja is still going strong? No updates since 2012.
Electricboating
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Thanks,
Greg
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