Two TESUP Magnum wind turbines are going on the hotel roof. Each will have its own TESUP charge controller, and both will feed one 10 kW inverter with two MPPT inputs. Here is the plan, and why it suits a hotel by the sea.

A boutique hotel on the water

Med-Inn is a small hotel with a pool garden, palm trees and its own pier into the bay. A hotel uses power all day and all night: lights, kitchens, pool pumps and, in summer, air conditioning. On the coast the wind often keeps going after sunset, when solar panels have stopped for the day.

Two Magnums on the roof

The turbines will stand on the roof, the highest point of the building. Up there the wind is cleaner and steadier than in the garden below, where palms and walls break it up. Our visualisation shows them on the round stair tower, on the right of the building.

The Magnum is our horizontal-axis turbine, with a white aluminium body and a 2.35 m rotor. It turns to face the wind on its own, so it does not matter which way the breeze comes in from the bay.

How the system fits together

• 2 × TESUP Magnum: horizontal-axis wind turbines on the roof.
• 2 × TESUP charge controller with IoT: one for each turbine. It turns the turbine's AC output into DC and reports to MyTESUP.
• 1 × 10 kW inverter with 2 MPPT inputs: one input per turbine, with AC out to the hotel.

Each Magnum has its own input on the inverter. MPPT stands for maximum power point tracking: the inverter finds the best operating point for each turbine on its own. If one rotor sees a stronger gust than the other, neither holds the other back.

Each charge controller with IoT also connects to MyTESUP. It measures voltage and current every second, so the hotel can follow both turbines live on a phone.

What comes next

We will share photos from the installation day. Once the turbines are running, their real numbers will show up in MyTESUP, and you can see how TESUP turbines perform around the world on our live performance page.

On our new performance page, the numbers come straight from connected TESUP turbines in customers' gardens and on their roofs. Each one is measured by its own MyTESUP controller and published every 10 minutes.

A TESUP Atlas, today

On 28 September, the strongest Atlas reporting to MyTESUP was in Ravenna, Italy. It had made 16.9 kWh that day and 260.0 kWh over the last 30 days. Its best day was 17.7 kWh, and its highest readings were 394 V and 8.3 A. On the page, the turbine picture turns as fast as the live power.

A customer's Atlas in Ravenna, Italy, as shown on the performance page on 28 September 2026. The date stays on the card, so the numbers stay honest as they age.

From the Arctic to New Zealand

Every connected TESUP system is a measuring station on a real roof. Together they record how small wind and solar really perform, in every climate on Earth. Each one sends five signals:

• Wind: rotor speed and output, at the height and place people really install turbines. Every second.
• Solar: panel output on Flex systems, against the real sky above them. Every second.
• Power: voltage and current from the controller, volts × amps, summed into the day. Every second.
• Temperature: local temperature, wind and cloud at each site, so output is read against its weather. Every hour.
• Visuals: a picture of the turbine and its surroundings, with the optional MyTESUP camera. On demand.

Measured, not modelled

Here is how a reading becomes a number on the page:

1. In the turbine: the MyTESUP controller reads voltage and current once a second. Power is volts × amps at that instant.
2. In the cloud: readings are averaged per minute and summed into daily energy. A minute with no reading counts as zero.
3. Chosen by the data: for each product, the connected turbine with the most energy in the last 24 hours is shown, re-checked every 10 minutes. Nobody picks it.
4. On the page: today, the last 30 days, the best day, peak voltage and current, and a 24-hour curve. Poor days stay on the chart. Owners are never named, and locations are shown at town level only.

Peak voltage and current are the highest one-second readings of the last 30 days, not datasheet ratings. When a turbine is resting, the time of its last reading is shown, never hidden.

10,000+ rooftops. One map.

With more than 10,000 installations worldwide, each controller reading once a second, the TESUP network is becoming one of the largest real-world datasets on small renewable generation. The public page refreshes every 10 minutes.

Border stations, training grounds, field camps and observation posts all share the same problem. They are far from the grid, and generators are loud, thirsty and need fuel brought in. Atlas is a vertical wind turbine built for exactly those places. It starts turning in a light breeze, keeps working in a storm, and runs at 35–40 dB, quieter than a conversation.

This post shows where Atlas is heading: three field colours, a camera on the face, and what the view looks like on your phone at 2 a.m.

Three colours for the field

Silver looks right on a roof. In the field, you want the turbine to belong to the ground it stands on. We rendered Atlas in three field colours, each matched to the terrain it is meant for.

The body, the 6-MC4 face sheet, the All in One flanges and every blade come straight from our production CAD files, down to the blade tabs hammered flat on the top flange. If your project needs Atlas in a specific colour, get in touch through the Atlas page.

A wind turbine that can see

Our R&D team is building a camera into the Atlas face, next to the TESUP logo. It runs on the power the turbine makes and is designed to stream to MyTESUP.

The idea is simple: every Atlas becomes a watch post. Where the turbine stands, you can see, without a separate camera mast or cable run.

The camera module is in development. Specifications may change before release.

Night, on your phone

MyTESUP already shows what your turbine is producing and lets you set its voltage limit from 0 to 400 V. With the camera, the same app becomes a live view of the site. Here is what each night mode looks like.

Infrared (IR, black & white)

Night vision (low light, green)

Thermal (white-hot, concept)

Pick the blade set for your site

The same Atlas body takes three blade sets, all fitted to the same All in One flanges. Choose by the wind you actually get, not the wind you hope for.

See your turbine’s day

Numbers tell you what your turbine did. The turbine camera lets you see it.

Through the day, the camera takes regular pictures of your turbine and the sky. On the Camera page in MyTESUP, you can play a whole day back as a short time-lapse.

Each picture comes with the wind speed and power at the moment it was taken. You can watch the weather change and see how your turbine responded.

How it works

A small weatherproof camera fits into the turbine’s electronics: into the body of the Atlas, where it looks out through the front panel, into the Magnum’s charge controller, and into the Wizard. It joins the wind and sun sensors on the same sensor cable through a short Y-cable, so the board and the existing sensors stay as they are. There is nothing else to install.

Your TESUP controller takes a picture every 5, 10, 15, 30 or 60 minutes. You can choose daylight only, and it adds extra pictures when the wind is strong.

In the MyTESUP app, a camera icon at the top of the home screen opens a separate Camera page. There you can:

• play back a day as a short time-lapse, with the wind speed and power for each picture
• go back day by day
• tap “Take a photo now”; the picture arrives within about two minutes

You’re in control

The turbine camera is off until you turn it on and agree in the app. You can turn it off at any time.

You decide how often it takes a picture and whether it works in daylight only. You also choose how long your turbine camera images are kept: 7, 14, 30 or 90 days.

If you want a clean slate sooner, you can delete them all with one tap.

Your privacy

Only you and the people you share your turbine with can see the turbine camera images.

TESUP support can’t see them either, unless you allow it in the app. That access lasts 7 days. You can stop it at any time, and you can see each time support looked.

These are images from the camera on your turbine. MyTESUP never looks at the photos on your phone.

One request from us: please point the camera at the sky and your turbine, not at people or their homes.

Coming soon

The turbine camera is in testing now, starting with the Atlas. It will be an option on the Atlas, on the Magnum’s charge controller and on the TESUP Wizard. We don’t have a date or a price yet.

Whether you already own a TESUP Atlas or Magnum or are thinking about buying one, we’d love to hear from you. Contact TESUP to register your interest.

The trouble with an Alaskan winter.

In Wasilla, the sun does a lot of work in summer and very little in winter. Using a full year of hourly weather data for 2025, the average solar energy reaching the ground was about 5.1 kWh per square metre per day in June, and about 0.18 in December. That is roughly 28 times less, in exactly the months when a household needs the most light and the most heat.

The wind does the opposite.

The same data tells the other half of the story. Wind near Wasilla averaged 3.0 m/s in December and 2.3 m/s in January, roughly double most summer months. Across the whole year the average is a modest 1.6 m/s, so we are not going to pretend Wasilla is a windy place. What it is, is a place where the wind turns up when the sun leaves, which makes a small turbine a winter partner for solar panels rather than a rival.

These figures come from a weather model grid at 10 metres above the ground, not from a measurement on anyone’s property. A clear, open site with the turbine on a pole can see a different picture, in either direction.

Meet the Matanuska wind.

The direction is where the valley shows its character. When the wind near Wasilla blew at 3 m/s or more, it came from the north-east 48% of the time and from the east another 25%, down the Matanuska and Knik valleys from the mountains. Locals know it as the Matanuska wind, and in winter it can be strong: the same data shows gusts of up to 25.7 m/s at Wasilla and 30.9 m/s at nearby Palmer, with 55 hours of gusts of 20 m/s or more at Wasilla over the year.

Which blades, and when to stop.

A vertical-axis turbine takes wind from any direction, so a valley wind that swings between north-east and east is no problem for the Atlas. For the light, everyday winter wind we would fit the Low-Wind blade set, which starts turning at 2 m/s and is rated up to 20 m/s. On the days when the Matanuska wind gusts beyond that, the right move is to stop the turbine and fit the Atlas protection cover, which locks the blades in place until it passes. For very exposed sites, the High-Wind set is rated to 35 m/s.

We wrote about stopping a turbine before a storm in A typhoon is coming. Here is what to do with your turbine. The Matanuska wind is not a typhoon, but the rule is the same: when the forecast is beyond what the blades are rated for, the right output is zero.

Solar for the long summer days. Wind for the long winter nights.

About 29 cents a kilowatt-hour.

According to the US Energy Information Administration, Alaska households paid an average of 28.8 cents per kWh in July 2026, against a US average of 18.3 cents. Every kilowatt-hour a turbine makes on a dark, breezy winter evening is one that does not have to be bought.

So: hello, Wasilla, and welcome to TESUP. If you live in the Mat-Su Valley and want to know what your own site could do, the Atlas vertical wind turbine page lists all three blade sets with their wind ranges.

Wind, gusts and solar radiation: ERA5 hourly reanalysis for 2025 via Open-Meteo, grid points near Wasilla (61.58°N, 149.44°W) and Palmer (61.60°N, 149.11°W). Electricity prices: US Energy Information Administration, average residential retail price, July 2026. Hero photo: Pioneer Peak on a winter evening near Palmer, Cecil Sanders, CC BY 2.0. We have not named our customer or their address.

An island shaped by the wind.

Sardinia sits in the middle of the western Mediterranean, with open sea on every side. Its most famous wind is the Maestrale, the north-westerly that sweeps across the island and can blow for days at a time. From the other side comes the Scirocco, warm air from the south-east that crosses the sea before it reaches the Gulf of Cagliari. Between them, the island is rarely still for long.

What the numbers say near Cagliari.

We looked at a full year of hourly wind data for 2025 for the plain just west of Cagliari, from the ERA5 weather reanalysis. At 10 metres above the ground, the wind reached 2 m/s or more in about 47% of all hours, and 3 m/s or more in about 31%. March was the windiest month, averaging 3.1 m/s.

The direction is the interesting part. When the wind blew at 3 m/s or more, it came from the south-east 36% of the time, from the north-west 27% and from the west 23%. In other words, the wind near Cagliari does not settle on one side. These figures describe a model grid cell at 10 metres, not a measurement on anyone’s roof, so a clear and open site can see a different picture.

Why a vertical turbine suits the Gulf.

A horizontal turbine has to turn to face every change of direction, and it loses output each time it does. A vertical-axis turbine does not care where the wind comes from. The Atlas takes wind from any side without yawing, which is exactly what a site with a north-westerly one day and a south-easterly the next needs.

For a site like this we would fit the Atlas with the Low-Wind blade set: the biggest of our three blade sets, with blades that start turning at 2 metres per second and reach their 2 kW peak inside the 2 to 20 m/s band where everyday winds actually live.

Maestrale from the north-west, Scirocco from the south-east: the Atlas does not have to choose.

About 30 cents a kilowatt-hour.

According to Eurostat, Italian households using between 2,500 and 4,999 kWh a year paid on average about €0.30 per kWh including taxes in the second half of 2025, and about €0.33 in the first half. That is a little above the EU average of about €0.29. Every kilowatt-hour a turbine makes on a breezy afternoon is one that does not come from the grid.

Flamingos, surfers and a new turbine.

Cagliari is a city that lives with the wind. Greater flamingos feed in the Molentargius lagoons right next to the city, surfers watch the forecast at Poetto, and sailors read the Maestrale before they leave the harbour. Now one more household nearby will be reading it too, this time on a turbine.

So: benvenuti, and welcome to TESUP. If you live on the island and want to know what your own site could do, the Atlas vertical wind turbine page lists all three blade sets with their wind ranges, and the Magnum horizontal wind turbine is there for open, steady sites.

Wind data: ERA5 hourly reanalysis for 2025 via Open-Meteo, grid point near Capoterra. Electricity prices: Eurostat, household consumers, 2,500 to 4,999 kWh a year, all taxes included. Hero photo: Poetto and the Sella del Diavolo, Cernegaja28, CC BY-SA 4.0. Map coastline: ISTAT boundaries via openpolis, CC BY 4.0. We have not named our customer.

See what your turbine is doing right now.

Open the app and your device is on the home screen. Under Status Now you see the voltage, amperage and power at this moment. Tap Refresh for the newest reading. Above it, Total Energy Generated shows what your turbine has produced today, and one tap switches to the last 30 days.

Know your site.

Every device card also shows the wind speed, solar irradiance and air temperature measured by your device’s own sensors. When the power is low, a glance at the wind tells you whether it’s simply a calm day. Wizard owners get a Site Summary with today’s and the last 7 days’ averages, the strongest gust, the solar peak and the temperature range.

Something looks wrong? Ask us from the same screen.

Open the menu (the three dots), tap Support, then New request. Choose the device, describe what you see, and add up to three photos of the controller display, the wiring or the turbine. Because you write from your MyTESUP account, our team already sees which device you mean and how it has been reporting, so you don’t need to look up serial numbers or copy readings.

Follow the conversation in one place.

Every request is a chat-style thread in the app. Our answers appear there and arrive by email, and you can reply or add photos at any time. The status tells you where things stand: Received, Open, Waiting for you or Solved.

An assistant for the quick questions.

For everyday questions about installation, wiring, inverters or batteries, tap the sparkle button and ask the MyTESUP assistant, powered by Claude. If you need a person, “Send this chat to support” passes the whole conversation to our team.

Keep the app up to date.

These features are in the latest version of MyTESUP. Update the app from the App Store or Google Play, sign in, and check your turbine today.

For everything the latest version brought, read our earlier post Meet the new MyTESUP app. It works for every Atlas and Magnum owner.

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.

An assistant that knows your products.

Tap the sparkle button on the home screen and ask anything about installation, wiring, inverters, batteries or the app. The assistant, powered by Claude, already knows which products you own, so you never have to type a serial number. Ask “which inverter should I use?” and you get the straight answer: a fixed V-A curve inverter suits a wind turbine best, and MPPT works too.

Attach up to three photos of your wiring, your controller display or your mounting spot, and it tells you what it sees before it answers. When a human is needed, one tap sends the whole conversation to our support team as a ticket. Every account gets 20 questions a day.

Your site, live.

Every device card now shows wind speed, solar irradiance and air temperature from your device’s own sensors, always with the latest known reading. Wizard owners get a Site Summary underneath: average wind with the strongest gust, average sun with the peak, and the day’s temperature range, for today or the last 7 days.

Turbines that look alive.

Atlas, Magnum and Wizard have new pictures, and an Atlas shows the blade set you registered. While your turbine is producing, wind streaks sweep across it on the home screen. When it is idle, it sits still, so a glance tells you the state.

Real numbers from real sites.

The app is only as good as the data behind it, and some of our customers are sending in a lot of it. One TESUP Atlas in Emilia-Romagna, Italy, reported 232 kWh of wind energy over the last 30 days, with the turbine reporting on 29 of those days. Its best day so far was 22 September at 17.7 kWh, with the turbine averaging 1.9 kW while producing and peaking at 3.8 kW. Every one of those readings came through the app, minute by minute, and the new version shows them the way they deserve: the last 24 hours, the daily energy chart and the site’s wind, sun and temperature side by side.

Your turbine, your site, your assistant. In one app.

Support, without leaving the app.

Open a ticket, attach photos, reply in a chat-style thread and read the team’s answers in the in-app inbox. Alerts from our control panel land there too, and you can reply to any of them.

Also in this release.

• Temperature added to the wind and solar box on every device.
• A labelled Refresh button on every card.
• Installation videos and product pictures appear inside assistant answers as tappable cards.
• The app now requires iOS 15 or later.

How to get it.

Update MyTESUP from the App Store now. Android follows. If you are new to the app, our earlier post Your Wind Turbine, Live in Your Pocket walks through what it already does for every Atlas and Magnum owner.

A surfer does not think of wind as weather. They think of it as a schedule. It has a direction, a time of day and a season, and it decides whether the morning is worth getting up for. That is exactly the knowledge a turbine owner needs, and most people have to learn it from scratch. Surfers already have it.

A surfer reads the wind before the news.

Ask anyone who surfs the east coast why they are in the water at dawn and they will give you a one-word answer: offshore. Overnight the land cools faster than the sea, and a light breeze drains off the land towards the water. It blows into the face of the incoming waves, holds them up, and makes them clean. By late morning the land has warmed, the flow reverses, and the afternoon sea breeze arrives from the ocean. On this coast in summer that is the nor’easter, and it is the reason the beaches are full of kites and sails by three o’clock and empty of surfers.

The point is not the surf. The point is that the wind on this coast is not random. It arrives on a daily cycle driven by the difference between land and sea, on top of a seasonal pattern that anyone who lives here can recite. A person who plans their week around it already knows the thing that matters most about a home turbine: that a site with a reliable, repeating wind is worth far more than a site with an occasional gale.

Thirty-two cents, and a valley full of chimneys.

Now the other half of the equation. Households in New South Wales pay between about 32 and 34 cents per kilowatt-hour on a typical single-rate plan, depending on which network they sit in, according to Finder’s 2026 survey of retail tariffs. On top of that comes a daily supply charge simply for being connected. It is not Hawaii, which we wrote about earlier this week, but it is among the higher household prices in the world, and it has been rising.

The Hunter is where a lot of that electricity used to come from. Liddell, half an hour up the road from Denman, closed its last unit in April 2023 after fifty years. Bayswater, next door, is still running. Eraring on Lake Macquarie, the largest power station in the country, has had its life extended twice and is now due to run until April 2029. The old Muswellbrook coal mine, which shut in 2022, is being turned into a solar farm with a grid battery. Whatever you think about the pace of the change, the direction is not in doubt, and it is happening in the valley where our newest customer lives.

For a century the Hunter made the state’s electricity in a handful of very large machines. The next version of that story is a very large number of small ones, and some of them are on poles in people’s gardens.

What a surfer’s wind sense tells you about a turbine.

The first thing it tells you is that wind near the ground changes direction all day. Offshore in the morning, onshore in the afternoon, swung around by every headland, tree line and roof. A horizontal turbine has to turn to face each of those changes and loses output every time it does. A vertical-axis turbine does not care. The Atlas takes wind from any direction without yawing, and for this coast and for the Hunter we would fit it with the Low-Wind blade set: the biggest of the three, aerodynamic blades that start turning at 2 metres per second and make their 2 kW peak inside the 2 to 20 m/s band where sea breezes, land breezes and valley winds actually live. It is already the most common choice for homes, and it gives about a kilowatt at 13 m/s. The High-Wind set makes more at the top end, but the top end is not where this coast spends its days. The daily cycle a surfer plans around is the cycle the big blades are built for.

The second thing it tells you is respect. Anyone who has surfed the east coast knows the southerly buster: a hot afternoon, a line of cloud on the horizon, and within minutes a cold wind from the south and a sea that has gone from friendly to dangerous. There are roughly thirty of them a year, most in spring and summer. Add the East Coast Lows that spin up in the Tasman and you have a coast where the wind is generous most days and serious on a few. A turbine on big low-wind blades should be run for the generous days and braked and covered for the serious ones, which is why we send every TESUP Atlas to Australia with the advice to keep the protection cover within reach.

The third thing is salt. A machine that lives on this coast lives in wet, salty air, and it has to be built for it. The Atlas uses nickel-coated magnets and aluminium blades rather than steel, and the new ground-screw base goes in without concrete, which matters on a sand or clay block a long way from the nearest contractor.

The arithmetic, for people who already know the wind.

A turbine does not need to be explained to someone who has spent twenty years checking the wind forecast before breakfast. It only needs to be priced. At thirty-two cents a kilowatt-hour, every unit a turbine makes on a breezy afternoon is a unit not bought from the grid, and on a coast with a sea breeze most summer afternoons those units arrive on a schedule you can set your watch by. Pair it with a battery and the house keeps running through the next outage, whether that outage is a storm on the coast or a hot week in the valley.

So: welcome to Denman. Whether you are on the coast or in the Hunter, the Atlas page lists all three blade sets with their wind ranges in metres per second, and for most sites in New South Wales the Low-Wind set is the one to tick, and the protection cover is the one accessory we would not ship to the east coast without.