This TESUP Hera Wind Pro has spent five years on an apartment balcony: five summers of sun, five winters of rain and frost, and every day of city air in between. Look closely at the photographs on this page. The paint still looks new.
We did not stage these pictures. They were taken from the street below, looking up through a tree at a brick facade, a glass balustrade and a turbine that has been standing there since it was installed. No studio lighting, no retouching of the finish. Just an ordinary afternoon and a finish that has not aged.
What five years outdoors usually does.
Anything painted and left outside is under attack every day. Sunlight breaks down the binders in a paint, so colours fade and the surface starts to chalk. Rain and dew find their way into the smallest chip or edge, and once moisture gets under a coating it lifts it, first as a blister, then as a flake. Temperature swings make the metal expand and contract under the paint every day and every night. In a city, soot and grime settle on top and slowly etch into anything soft.
Most outdoor equipment shows its age within a couple of seasons. Dull patches, rust tracks under the fixings and peeling edges are the usual signs.
What the photographs show.
The Hera body carries the same even sheen from its top plate down to its base. There is no chalky bloom and no faded side where the sun hits hardest. The fine wave pattern that runs down the body is still sharp line by line, and the HERA lettering beside it is still crisp. The edges of the top and bottom plates, usually the first place a coating gives up, are clean.
Paint is the first thing people see on a wind turbine, and it should be the last thing you ever have to think about.
Why this finish lasts.
It starts with the metal. TESUP bodies are made of aluminium, which does not rust the way steel does, so there is no red corrosion waiting underneath to push the paint off. The Hera was also built with stainless steel mounting elements, so the fixings do not bleed rust stains down the body either.
Then comes the paint itself. We apply it with a high-temperature process: the coating is cured with heat so that it bonds directly to the aluminium surface, rather than sitting on top of it as a thin film. A heat-cured layer like this is dense and hard, and it holds on through UV, moisture and temperature swings that make ordinary paint chalk, blister and peel.
The last part is care. Every panel is prepared before it is coated, because a finish is only as good as the surface under it. The balcony in these photographs is what that care looks like five years later.
The same care, on a bigger line.
Since this Hera was made, we have brought even more of the finishing work under our own roof. Today our aluminium panels are cut, bent and then coated on our own in-house powder coating line, before they are assembled into the turbines we ship. It is the line that finishes the aluminium parts of our Atlas vertical wind turbine and our Magnum horizontal wind turbine today.
Why it matters on a home.
A home wind turbine is not hidden in a field. It stands on a balcony, a roof or in a garden, where you, your family and your neighbours see it every day. A finish that fades or peels turns a statement about clean energy into something that looks neglected. A finish that holds keeps the turbine looking like part of the building, year after year.
Five years in, this Hera still looks the way it did the day it went up. That is the standard TESUP paints to.
The photographs on this page were taken from the street below the balcony. We have not named the building, its location or the owner.