EVLN: 4.9kW PV powers DIY e-boat to complete The-Great-Loop

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EVLN: 4.9kW PV powers DIY e-boat to complete The-Great-Loop

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http://www.powerboat-world.com/news/199904/The-Great-Loop-completed
Solar-powered boat completes the Great Loop – A first
2 Dec 2017  Peter Janssen

[images  
http://www.powerboat-world.com/photos/powerboat/yysw183831.jpg
Solar-powered boat © Jim Rhodes, Rhodes Communications

http://www.powerboat-world.com/photos/powerboat/yysw183830.jpg
Jim Greer
]

A homemade 48-foot trimaran running entirely on solar panels, batteries and
an all-electric Torqueedo propulsion system just completed the Great Loop.
Jim Greer, the 75-year-old former filmmaker and captain of the boat, says
it's the first time a boat has done the Loop entirely under solar power.

"With solar panels, batteries and Torqueedo electric motors, we were able to
complete our travel days without any use of fossil fuels or plugging into
marina electric hook-ups when we docked," Greer said. "We don't have a
backup generator or power cords in case of emergency, and that's the
adventure of it."

Greer, who once hung out with Ken Kesey and his Merry Pranksters in the
'60s, named the boat RA, after the sun god of ancient Egypt. The route took
him from his home in New Port Richey, Florida, up the East Coast, the
Hudson, the Erie Canal, the Great Lakes, and then down the Mississippi and
across the Gulf of Mexico and back home.

The boat usually ran at 5 mph, Greer said, to optimize the battery capacity;
it once hit a top speed of 10.7 mph. He usually covered 30 miles a day,
although RA had a single run of 142 miles in 42 hours across the Gulf of
Mexico.

RA is powered by one Torqueedo Cruise 10 kW motor and two smaller Torqueedo
Cruise 4 kW outboards. They draw power from two banks of batteries – one
with four 12V AGM batteries in a 48V configuration, and the other with eight
of the 12V AGM batteries, also in a 48V configuration. They were charged
from an array of 20 245-W solar panels on the cabintop.
[© 2017 Sail-World Powerboats]
...
https://en.wikipedia.org/wiki/Trimaran
A trimaran is a multihull boat that comprises a main hull and two smaller
outrigger hulls (or "floats") which are attached to the main hull with
lateral beams. Most trimarans are sailing yachts designed for recreation or
racing; others are ferries or warships ...
...
https://en.wikipedia.org/wiki/Great_Loop
The Great Loop is a system of waterways that encompasses the eastern portion
of the United States and part of Canada. It is made up of both natural and
man-made waterways, including the Atlantic and Gulf Intracoastal Waterways,
the Great Lakes, the Rideau Canal, and the Mississippi and
Tennessee-Tombigbee ...



http://www.powerboat-world.com/news/199855/Torqeedo-powers-RA-Great-Loop-voyage
Torqeedo powers solar boat’s Great Loop trek
1 December 2017  Torqeedo Press

[image  
http://www.powerboat-world.com/photos/misc2017/yysw183684.jpg
Jim Greer solar boat RA © Steve Yeatts
]

 Capt. Jim Greer and his solar boat RA returned to their home port in New
Port Richey, Florida, Nov. 8, after completing a 7,200-mile voyage running
totally on solar panels, batteries and an all-electric propulsion system
provided by Torqeedo.

The Great Loop voyage took RA from Florida up the East Coast, through the
Great Lakes, down the Mississippi and across the Gulf of Mexico, completing
the trip at Sand Bar Island, Florida. It was completed in two segments with
a break in Waterford, New York. Greer said this was the first time a
solar-powered all-electric boat has completed the Great Loop.

"With solar panels, batteries and Torqeedo electric motors we were able to
complete our travel days without any use of fossil fuels or plugging into
marina electric hook-ups when docked," said Greer. "We don't have a backup
generator or power cords in case of emergency, as that's the adventure in
it."

The custom vessel, designed and built by Greer, is a 48-ft. trimaran named
for the sun god of ancient Egypt. It is propelled by a Torqeedo Cruise 10.0
kW motor and a pair of smaller Cruise 4.0 kW outboards. The electric motors
draw power from two banks of batteries – one with four 12V AGM batteries in
a 48V configuration, and the other with eight of the same batteries also in
a 48V configuration. The batteries are recharged from the array of 20 245-W
solar panels on the roof of the cabin.

Greer estimates that the cost of fuel for a similar size boat would have
been at least $10,000 for the Great Loop. "Not only did we save money on
fuel, we achieved zero emissions, demonstrating that boating doesn't have to
pollute the air or water with emissions from a combustion engine."

"The Torqeedo motors are real workhorses," said Greer. "They are amazingly
efficient. We recorded a top speed of 10.7 mph at 7,300 W, but we normally
ran at five mph to optimize battery capacity, typically putting in a 30-mile
run per day."

The overall integrated solar-battery-motor system worked very well,
according to Greer. "We could easily run all day on solar power when the
weather was good. We could also run on the batteries for extended periods of
time without sunlight. Our longest single run was 142 miles in 42 hours
non-stop day and night crossing the Gulf of Mexico."

"Capt. Greer's pioneering solar-powered voyage provides a compelling
validation of the efficiency and reliability of electric boats," said Steve
Trkla, president and general manager of Torqeedo, Inc.

"No doubt about it, electric is the wave of the future," said Greer.
[© 2017 Sail-World Powerboats]




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