The pier runs out into the harbor and there is nothing between it and the wind.
Cruise ships tie up along it. The deck is timber, and it is wet most mornings.
Nobody would call this a good place for solar.
The terminal handles cruise traffic, so the deck also has to stay clear enough for passengers and crew to move across it whenever a ship is alongside.
Salt gets into everything, the wind has a clear run at whatever you bolt down, and the surface underfoot is a public walkway that people cross at all hours.
Three companies put panels there anyway.
Not the usual kind. These are printed on plastic, weigh almost nothing, and lie flat on the boards with no racking at all.
What salt wind does to a solar panel
A conventional module is a silicon wafer sealed behind glass in a metal frame.
The electrical contacts and the aluminum that carry the load are the weak points, because salt air attacks exposed metal and any leak in that seal lets water in.
Then there is the weight.
Glass and frame put over two pounds on every square foot, which is why anything holding a conventional array on a pier needs steel behind it.
Perovskite solar modules solve both problems by dropping both parts.
The light absorbing layer is a crystal compound coated onto plastic rather than sliced from a grown ingot, so the finished panel bends, carries no glass, and weighs a small fraction of the usual.
What the installation actually looks like
The deck itself is Brazilian ipe, a hardwood chosen for surviving weather.
It doubles as a public rooftop plaza that stays open around the clock, sitting no more than 49 feet above the ground at its highest point.
The modules sit directly on it.
Long narrow strips, roughly 12 inches by 39, laid in lines along the planking instead of tilted up on angled steel like a conventional array.
From a few paces they barely register.
They read as a dark membrane rather than the blue rectangles people picture, which is the entire point of putting the test somewhere visitors walk.
What has actually been installed
The first phase ran from 12 November 2024 to the end of that January, roughly three months.
It used about 80 modules for a combined rating near 1 kilowatt, converting close to a tenth of the light that struck them.
The film is thinner than paper.
Indium tin oxide on a plastic sheet about five thousandths of an inch thick, made on a roll to roll line rather than cut from wafers.
Roll to roll is the manufacturing argument for the whole approach, and the reason a company that has never made a solar panel can start making these.
A second phase started in September 2025.
Sixty modules this time, the same 1 kilowatt rating but better efficiency, running through to February 2026 with an identical sixty installed on an ordinary building rooftop away from the water.
Where this sits next to other coastal ideas
The comparison set is the part that makes this an experiment rather than a showcase.
Two matched arrays, one exposed and one sheltered, produce a number for what salt and wind actually cost, which is a figure nobody currently has for this technology.
Water adjacent solar is not new.
Reservoirs in China carry arrays above a fish farm, and the shade turns out to help the carp, but those float on calm water behind an embankment.
A cruise pier is a different animal.
There is no embankment, no shelter and no calm season.
It gets hit by weather the way a rooftop turbine does, and it has to keep working as a public deck while it does.
What still has to be solved
Perovskite hates water.
The material degrades in the presence of moisture, so the entire question is whether a plastic encapsulation can hold for years in an environment defined by damp.
The targets tell you where things stand.
The consortium is aiming at 20 percent efficiency and a 15 year service life, which is roughly double what film perovskite modules currently manage and still well short of what glass and silicon deliver.
Cost is the other half.
The pitch is that most Japanese roofs cannot carry a conventional array at all, so a module that weighs nothing opens surfaces that were simply unavailable before.
So a pier is the right place to fail.
If the encapsulation gives out anywhere, it gives out here first, and finding that out on a wooden deck is cheaper than finding it out on ten thousand roofs.
The trade coverage has the film specifications. The Japanese coverage has the second phase.
Read the whole thing?
Get the week's signal, not the noise
Our sharpest reporting on energy, climate and nature — free, once a week.
