solar-powered boats

Greenline 33 Shows How to Do Green

Greenline 33 Shows How to Do Green

Greenline 33 at Annapolis

Greenline 33 at Annapolis

In a recent piece I did for, I wrote that the new Greenline 33 cruiser is the real green deal.  I saw and briefly tested the boat at the Annapolis Powerboat Show last fall and it truly impressed me.  Here’s a quick rundown on the boat; for the full story, read the article at

This boat will:

  • Take power from the pedestal when tied up at the dock
  • Take power from the sun through its solar-panel roof and drive the boat at 6 knots for 20 miles
  • Take power from its VW Marine diesel; either the standard SDI 75-5, driving the boat at about 10 knots; or the optional TDI 165-5. Either way, you will be sipping quarts of few per hour, not gallons.
Demonstration of fold-down transom on Greenline 33

Demonstration of fold-down transom on Greenline 33

You can enjoy your own stateroom forward with a fillable vee-berth, and bring the grandkids along for the weekend and let them sleep in the salon. The galley is aft along the starboard side, and its glass rear wall folds up with the help of a gas piston, opening the whole back of the boat to the cockpit and folding transom/swim platform.


Galley opens to aft cockpit on Greenline 33

Galley opens to aft cockpit on Greenline 33



LOA                     32.77’
Beam                   11.45’
Draft                      2.46’
Displacement     10,582 lbs
Fuel                     132 gal
Water                     79 gal

The Greenline 33 is being distributed in the U.S. by TUI Marine and you’ll be able to see it at the Miami Boat Show in February. If you want to see it before then, get to Annapolis Yacht Sales in Maryland. You can get this boat for under $300K, which means real people can actually afford it.

Copyright © 2010 by OceanLines LLC.  All rights reserved.

Posted by Tom in Boats, Cruising Under Power, Powerboats, Technology

New Partnership Will Develop Independence 60 Green Yacht


Click for larger view of Independence Green Yachts 60 -- Artist's Rendering

Independence Green Yachts 60 -- Artist's Rendering

HB Marine and Independence Green Yachts yesterday announced a partnership that will form a joint venture to develop the Independence 60 Luxury Yacht that IGY started a few years ago. The Independence 60 is billed as the “world’s first ‘no compromise’ sustainable yacht.” A combination of solar cells, hydrogen production and storage and fuel cells provide complete independence from fossil fuel.

Here’s what the two companies had to say yesterday:

“The partnership between HB Marine, owner of a patented technology for the production, storage, and use of hydrogen aboard marine vessels, and Independence Green Yachts, developer of the solar/hydrogen powered Independence 60 power yacht, is a very compelling and timely combination. The joint venture will offer the marine industry fully integrated and self sustainable yachts (like the Independence 60) as well as clean energy power and propulsion systems for new construction and retrofits of existing yachts.

IGY is the developer of the Independence 60, the first totally self-sufficient, solar/hydrogen powered motor yacht that requires no fossil fuels or internal combustion engines. “Building a sustainable boat that can cruise cleanly, quietly and without ever having to use fossil fuels has been my dream since the Navy,” said Fred Berry President of IGY. “In conjunction with HB Marine, we can make this dream a reality.”
HB Marine has developed and patented internationally, a hydrogen-based, multi-use power and propulsion system for all types of marine vessels using readily available technology. “We have been searching for the right marine partner to bring this clean technology to market. The unique design of the Independence 60 effectively integrates the best of clean energy marine power and propulsion technologies , which will open a new era of simple, clean, quiet, reliable and sustainable yachting,” said Bruce Wood, Managing Director of HB Marine.”

The power system for the Independence 60 represents the very cutting edge of energy generation, storage and management. To-date, that title has been held by Island Pilot’s DSe Hybrid, developed by Reuben Trane. The DSe has the solar cells and vertical wind turbines, but still relies on a diesel engine/generator to recharge the batteries on cloudy days or when energy usage exceeds a little more than 6 kW. The Independence 60 has twin azimuthing electric motors. The system takes electricity from the solar arrays, or from the battery bank, and uses an electrolyzer to separate pure water from a watermaker (or, downstream in the process from a fuel cell)  into molecular hydrogen, which is then stored in a room-temperature, normal atmosphere metal and then provided upon demand to a fuel cell, which will generate a lot more electricity to replenish batteries, or to provide power to an inverter, and through a service panel to the electric motors.

Here is a simplified diagram of the power system aboard:

Click for larger view of Independence Green 60 Power Schematic -- Graphic from IGY 60 Brochure

Independence Green 60 Power Schematic -- Graphic from IGY 60 Brochure

Have a look at the yacht in this updated brochure.

Here are the basic specs on the boat:

Independence Green 60

•LOA:      59′ 5″
•LWL:      53′
•Beam:     14′
•Draft:        4′
•Displacement:      61,000 lbs
•(2) 75 KW 480 V AC external azimuthing submersible electric motors
•Fuel:      Water
•Energy source:      The Sun
•Fresh water:            200 USG
•Black water:               84 USG
•Grey water:              300 USG
•Top speed:                13 knots*
•Cruising speed:         8 knots*
•Range at cruise:      6 00 nm*
•Range at 6 knots:   1200 nm*

*Figures are based from Engineering estimates
More detailed specifications are available on the Independence Green website here.

Copyright © 2010 by OceanLines LLC.  All rights reserved.

Posted by Tom in Boats, Construction & Technical, Cruising Under Power, Electronics, Engines, Passagemaking News, Powerboats, Technology