Seriously, guys. It's very nice, and well worth the price, but the standard for "spectacular" in large yachts is far, far above this one. There are probably yachts that have boat garages in which you could park a Solarwave 64.

You are joking, right? OK, let's do the math. 15kw of solar power is the equivalent of 20hp. The next time you rev up your 65 ft yacht w/a 20 hp engine call me!

I suppose night time cruising is on batteries only, or raise a sail.

As Isolato notes, 20hp for a 65 ft boat is underpowered. Maybe on a calm day with a little wind at your back, 6-7 knts might be possible, maybe. However, with the amount of freeboard this boat has, mild headwinds or crosswinds are going to be problematic. Realize that 20hp is if all the power is efficiently transfered to the motors....none to lights or pumps or radio or refrigerator or.... Also, take a look at the solar panel area. If that boat is 65 ft long....roughly 20m long, it doesn't look like the solar panels could cover more than 50 square meters, at best. 50 square meters, if the sun is directly overhead on a clear day has about 50 kW of incident solar radiation. That means an efficiency of at least 30% on those solar panels, higher if less than 50 sq meters of panels are present. 30% efficiency is doable in the lab. I don't think it is happening in production cells.

I agree. While not being a Debbie downer and agreeing that this is a nice boat, the first paragraph is misleading. No, the boat is not powered by solar alone. If it was cloudy for 2-3 straight, you wouldn't get far with this. You might save a bit in overall fuel cost but that would itself be offset by the cost of engineering, installation of the panels. No - it is not the final solution as the writer would have you believe yet it is a step in the right direction. Way to go.

As a youth I sailed to Hawaii with a diesel aux engine. We sailed from LA CA to Honolulu HW at as an average speed of 9 kts and burned less than a gallon of diesel. Thru weather fair and foul. 65 foot gaf rig schooner. Even adjusted for inflation, it probably cost 5 percent of the wonderyacht.....seems as if we might spend a very large sum for a pretty face with low low performance.

Assuming the boat is 64 feet long, I cut and pasted the one picture showing a top view of the boat for showing the boat layout by deck into paint. The boat was a total (after 5x expansion) was 1720 paint units long. That means each foot = 27.5 paint units. The solar array measured 1035 x 585 paint units or 37.6 feet x 21.3 feet or a little over 800 ft^2 or a little over 74 m^2.
That reduces the efficiency to just over 21% assuming an actual 15KW array (everyone ALWAYS rounds in the way that sounds best for them). Also assuming the author made not typographical errors as has happened in the past, 21% is reasonable for production high end solar panels.
Assuming the panels are gallium arsenide tri-layer, that might even be on the low end of production as in lab results are over 44% now and the record is over 48% energy conversion. If I were getting a 2.5 million euro boat powered primarily by photovoltaic cells, I would definitely want the best cells out there.
Now you all do the math on the power. I get really confused when they give power produced by a solar panel because Watts=Amperage^2 x Voltage. Amperage = Coulombs/second. So Watts should be per second^2 but apparently for solar panel power calculations it is not or a 100 Watt solar panel could easily supply all the power needed for an all electric home anywhere in the continental United States or Hawaii. (100W/sec = 3600WH/hour or 3 times the average electricity used in homes in the United States; allowing at least 6 hours daylight that is 21,600 WH/day or 648,000 WH/month; see why I do not understand the power output of a solar panel.)

Such an awful interior... It is hard to believe what forms and colours were chosen for such a luxury boat....

Until solar panel efficiency reaches at least 70%, it's not feasible. Such a fabulous looker doing 5-6 knots would hardly exceed the currents in some waters... and look stupid

You would only run on electric only for short periods of time so you would run off batter while the panels charged them. After you deplete the battery you are limited to only the current throughput of the panels alone but before that you would have (significantly) more power to work with without needing to use the diesel engines. The same is true of being anchored. You could power all of the onboard electronics without needing to fire up the engines for electricity. It sounds like massive overkill for things like lighting and stereo systems but when you get into things like air conditioning the large solar array is actually pretty useful to avoid needing the motor running. Most boats spend most of their time stopped, idle, anchored, or docked and in all those cases the motor is just used to generate power which is where the panels would be the most useful. For actual traveling if you ran out of fuel or the engines both died you would get a 4-5 hours of solid power on battery alone before needing to rely on panels as your only source of power for propulsion. It's not insignificant.