This Entire Island Is Powered Using Only Solar Power And Batteries

Clean energy, 365 days a year

The island of Ta’u in American Samoa has achieved something that very few places on Earth has.

It is powered entirely, come rain or shine, by the Sun.

This is all thanks to one of the world’s most advanced microgrids, which combines solar panels with a huge array of batteries to store excess energy.

It was designed and built by the newly Tesla-owned energy company SolarCity.


To generate the power, SolarCity installed over 5,000 solar panels at one end of the island.

These produce a massive 1.4 megawatts of power, enough to keep the lights on across the entire island.

Of course, not every day is going to be a sunny one, which is also why Ta’u contains a massive battery installation, allowing the island to store energy for when it’s needed.

Using 60 Tesla Powerpacks the island is able to store enough electricity to supply it for a full three days without any sunlight.

There are 60 of these powerpacks installed in the island.
There are 60 of these powerpacks installed in the island.

Like many islands around the globe, Ta’u is a long way from anywhere; it’s over 4,000 miles from the American coastline.

This means that getting anything to the island takes a long time and costs a lot of money.

The Rise Of Renewable Energy

Of course Ta’u isn’t the only place where clean energy has been making its mark:

Until now the island had been getting its power through diesel generators, using a staggering 109,500 gallons of diesel every single year.

SolarCity’s microgrid will wipe out that need, and instead replace it with clean, free, limitless energy courtesy of the sun.


“I recall a time they weren’t able to get the boat out here for two months,” said Keith Ahsoon, a local resident whose family owns one of the food stores on the island.

“We rely on that boat for everything, including importing diesel for the generators for all of our electricity. Once diesel gets low, we try to save it by using it only for mornings and afternoons. Water systems here also use pumps, everyone in the village uses and depends on that. It’s hard to live not knowing what’s going to happen. I remember growing up using candlelight. And now, in 2016, we were still experiencing the same problems.”

The project has been funded by the American Samoa Economic Development Authority, the Environmental Protection Agency, and the Department of Interior.

10 Modern Day Wonders Of The Green Energy World

Innovation, Science And Technology Building At Florida Polytechnic University By Santiago Calatrava
John Greim via Getty Images
Some of us go to university classes in dreary 1960s-era blocks, others have a slightly more atmospheric backdrop for lectures.

Take the Innovation, Science and Technology Building at Florida Polytechnic University, designed by superstar architect Santiago Calatrava.

The futuristic building combines aluminium, concrete and glass across 200,000 square feet, in a structure that manages to be at once sturdy and delicate. The aluminium trellis helps to cut solar gain by 30%, while an operable roof has 46 aluminium louvers driven by hydraulic pistons to regulate sunlight, which also streams through the vaunted chambers. Can we re-enroll or something?
The Bullitt Center, Seattle
Nic Lehoux for the Bullitt Center
The Bullitt Center in Seattle is the greenest commercial building in the world. It's a reflection of what it's possible to achieve when it comes to urban sustainability, and it's pretty awesome: think net zero energy and water, composting toilets, toxic-free materials, FSC wood, radiant heat, solar panels, a bike garage instead of a car park, and much more.

"A deep green building is not a mere stylistic preference, like Art Deco or Brutalism. The decision to generate power with rooftop solar panels is not akin to selecting granite countertops," explains Bullitt Foundation CEO, Denis Hayes, on the website.

"Deep green buildings are a necessary component of resilient cities, and resilient cities are a strategic necessity if the current generation is to pass on a diverse, habitable planet to the next. Cities must quickly evolve from impersonal, dystopian collections of megaliths into healthy, living ecosystems." The Bullitt Center can help pave the way.
Bahrain World Trade Center
World Trade Center Bahrain
This multi-award winning, 240-metre-high, 50-floor-tall twin tower structure was the first skyscraper in the world to integrate wind turbines into its design.

The sail-shaped twin towers of the Bahrain World Trade Center are optimised to help funnel wind through the gap and allow accelerated wind to pass through the turbines, so as to generate more electricity - roughly 11-15% of the towers' total power consumption.
Horst Gläsker's AERO_ART Wind Turbines
Horst GlaskerAEROART
When is a wind turbine more than just a wind turbine? When it's a work of art, of course, which is the case with Horst Gläsker's AERO_ART turbines.

The German artist's project consists of taking bland white turbines and turning them into colourful, beautifully patterned sculptural art pieces in their own right.

These eye-catching pieces make us stop and take a look at what the turbines really represent: innovation, regeneration and a positive future.
The Edge Building, Amsterdam
Dirk Verwoerd Courtesy of PLP Architecture
Deloitte's got some pretty sweet digs in Amsterdam: a 40,000m² office building known as The Edge, which happens to have been awarded the world's highest BREEAM rating for an office building.

The building is more than energy neutral - it's energy-positive - and uses 70% less electricity than comparable structures. Factor in photovoltaic panels on the roof and south-facing façades, an aquifer thermal energy storage system for heating and cooling, smart technology and frequent monitoring of occupancy, movement, lighting levels, humidity and temperature and you've got the blueprint for how new technologies and sustainable design can thrive in urban centres.
Hepburn Wind Turbines By Ghostpatrol
Studio Aton/Ghostpatrol
Hepburn Wind owns and operates Australia's first community-owned wind farm, 100 km northwest of Melbourne. The two on-site wind turbines, known as Gale and Gusto, power over 2,000 homes.

They've also got serious street cred: the turbines have been painted by Melbourne-based street artist Ghostpatrol, making them fabulous to look at, as well as being providers of clean energy.

"The turbines stand as visual reminders of where power comes from and our responsibility to the environment," Ghostpatrol said.

"It was easy to add a positive spirit to the turbines, which are already beautiful. I’m proud to be involved in such a great project and be part of spreading the word about action on energy."
The Crystal, London
The Crystal London
Opened in 2012 by Siemens, The Crystal is one of the world's most sustainable buildings, which houses the largest interactive exhibition on the future of cities and is also used as an events space and offices for Siemens.

Designed by Wilkinson Eyre, The Crystal's unique shape is inspired by the many sides of a crystal. The all-electric building runs on solar power and a ground-source heat pump to generate its own energy, and uses rainwater harvesting, black water treatment, solar heating and automated building management systems as part of its sustainable design.
California Academy Of Sciences By Renzo Piano
Tim Griffith via Getty Images
Renzo Piano is one of the first architects with a green agenda, and this museum built in 2008 is a testament to how style and sustainability work in perfect harmony.

The building serves as an education, conservation and research centre, with an aquarium, planetarium, and natural history museum all under a two-and-a-half acre living roof, which can absorb nearly two million gallons of rainwater a year.
PARKROYAL On Pickering, Singapore
R Kubitza
Singapore's first hotel-in-a-garden, the PARKROYAL on Pickering, is quite the sight to behold and features 15,000m² of sky gardens, reflecting pools, waterfalls, planter terraces and vertical greenery.

It doesn't just look good, it does good, too: the self-sustaining landscapes promote fresh air and natural light in lieu of energy-sapping air con, and the tropical plants promote biodiversity in the space. Any rainwater collected from the upper floors helps to irrigate planters lower down, while the roof has photovoltaic panels to power grow lamps and softscape lighting.
Conergy New Caledonia Solar Farm
Artists ImpressionConergy
There are solar farms and then are really, really cool solar farms. This is an example of the latter: solar energy firm Conergy is building quite possibly the nicest symbol of love for our planet, a heart-shaped solar farm on the Pacific Island of New Caledonia.

Inspired by Heart of Voh wild mangrove vegetation nearby, the farm will generate electricity to supply power to 750 farms and will save an estimated two million tons of carbon dioxide emissions over its projected 25-year lifetime.

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