A team of researchers from WWF, McGill University, and other institutions studied about 7.5 million miles of rivers worldwide to determine whether they're well connected. They found that only 37 percent are free-flowing — meaning they're largely unaffected by human-made changes to its flow and connectivity. Dams built in the wrong place and climate change are impacting river health worldwide, and the planet's remaining free-flowing rivers are largely restricted to remote regions of the Arctic, the Amazon Basin and the Congo Basin.
Vanishing Free-Flowing Rivers
Long free-flowing rivers are vanishing. Around the world, rivers are becoming increasingly fragmented by dams and other development — such as roads or dikes — endangering freshwater ecosystems and the people and wildlife that rely on them. Free-flowing rivers transport water, nutrients and species that sustain biodiversity and benefit millions of people. To help countries and communities better protect their freshwater resources, WWF and partners came up with a technical definition of a free-flowing river and then created a first-of-its-kind, scientifically backed map — a comprehensive inventory of the world's last free-flowing rivers, rivers with good connectivity and impacted rivers.
1. Mura River — Slovenia
Called the "Amazon of Europe," the Mura River provides critical habitat for endangered and rare species such as otters, Danube salmon and black stork. After urging from WWF and others, in February 2019, the Slovenian government signed an agreement to stop all hydropower plant development that would devastate the Mura.
2. Usumacinta River — Mexico
In June 2018, guided by WWF and partners, Mexico established water reserves across nearly 300 river basins, guaranteeing water supplies for 45 million people for the next 50 years. Ninety-three percent of the water in the Usumacinta — the longest, most biodiverse river in Central America and one of Mexico's — is now federally protected.
3. Bita River - Colombia
The Colombian government named the Bita River basin a Ramsar site — a wetland of international importance — in June 2018, thanks in large part to the work of WWF and partners. Covering 825,000 hectares, it's the largest of the country's 11 Ramsar sites and one of the few in the world to encompass an entire free-flowing river watershed.
4. Paraguay Basin — Brazil
More than 100 dams planned for the Upper Paraguay Basin could hurt water supplies, biodiversity and local communities. After tremendous efforts from a coalition including WWF, Brazil's National Water Agency suspended new dam development there until May 2020. But the suspension only applies to rivers under federal jurisdiction — so just 20 of the 100 dams will be suspended.
5. Luangwa River — Zambia
The Luangwa, which is free but impacted by a dam on a nearby river, is at risk. A proposed dam at Ndevu Gorge threatens this wild waterway, which shelters abundant wildlife and human populations. In Zambia, WWF is advocating on behalf of people and nature, pushing the government to reconsider its energy plans and ensuring that local people maintain their rights to natural resources.
6. Irrawaddy and Salween Rivers — Myanmar
In Myanmar, an in-depth Strategic Environmental Assessment recommended that the main stems of the Irrawaddy and Salween rivers — two of the last long free-flowing rivers in southeast Asia — should remain free of dams. But there is still risk, making alternative energy such as solar and wind power even more important for people, rivers, and the country's economy.
Learn more about free-flowing rivers and WWF's efforts to protect them.
Mapping Downs
Dams provide safe drinking water and electricity to millions of people. But when built in the wrong place — for instance, a river's main stem — they can impede a river's flow, causing drastic declines in biodiversity and affecting fish migration, agriculture and livelihoods. Today there are more than 60,000 major dams around the world — a number that's increasing to meet demand for hydropower. WWF is helping national governments, industries and developers consider both the long-term impacts on local people and habitats and other potential alternative options for meeting water and energy supply needs, as well as helping them identify the best opportunities for river restoration projects. Solar and wind prices are going down, making them attractive alternatives.
Our Picks for the Best Portable Solar Generators
Each product featured here has been independently selected by the writer. If you make a purchase using the links included, we may earn commission.
- Best Overall - Goal Zero Yeti 1500X
- Best High-Capacity - MAXOAK Bluetti EB150
- Best Expandable Power - EcoFlow RIVER Pro
- Best Compact Design - Renogy PHOENIX 300
- Best Portability - Suaoki S370
- Best for Camping - Jackery Explorer 300
- Best Price - Westinghouse iGen200s
How We Reviewed Portable Solar Generators
A good portable generator will offer you backup power in a convenient and reliable way. We have reviewed some of the top models on the market today, and arrived at a few that we think stand out from the rest.
To rank the best solar generators, we considered the following criteria:
- Size and weight. Smaller, more lightweight units offer much greater ease of use. We sought portable solar generators that aren't too challenging to lug around your home, or take with you when you go camping.
- Battery storage capacity. While your generator absorbs light through a solar panel, that energy is ultimately stored in a battery. The battery storage capacity, measured in watt-hours (Wh) determines how long you can use the generator before it requires a recharge.
- Inverter rating. Basically, inverter rating refers to the total number of watts that the solar generator can extract at any given time. Inverter rating, along with battery capacity, determine the wattage and power output of your generator.
- Expandability. Some generators come with a predetermined number of solar panels, while some allow you to add more solar panels as needed. This is an important feature to consider when looking for generators.
- Price point. Naturally, when looking for a new solar generator, staying on budget is always going to be a factor. We chose generators that are competitively priced.
The Best Portable Solar Generators
With these ranking factors in mind, here are our picks for the best portable solar generators available in 2021.
Goal Zero Yeti 1500X
goalzero.com
Goal Zero's line of Yeti portable power stations are well-suited for a wide range of off-grid uses, including emergency power, camping trips, and more. The Goal Zero Yeti 1500X is their most-popular large power station with enough power for everything from cell phones and laptops to medical devices like CPAP machines and even full-size refrigerators.
Why buy: The Goal Zero Yeti 1500X includes a 2000W AC (3500W Surge) inverter giving you the equivalent of a wall outlet power supply on-the-go. It also has seven different port options and a top-of-the-line app that makes it easy to monitor and manage your solar powered generator, no matter where you are.
MAXOAK Bluetti EB150
maxoak.net
For a high-capacity power station, check out the Bluetti EB150 from MAXOAK. Though it's not the most affordable option, you'll get a lot of features and utility for your investment. It includes a lithium ion battery capacity of 1500 Wh. When connected to three 150W solar panels, it can be recharged in about 3.5 to 4 hours.
Why buy: For a portable solar generator designed to power most household appliances under 1000W, the high-powered Bluetti EB150 is a great choice. MAXOAK also backs their product with a 24-month replacement or maintenance warranty.
EcoFlow RIVER Pro
ecoflow.com
EcoFlow boasts an impressive catalog of portable power stations, as well as reliable solar panels. We like the EcoFlow RIVER Pro power station because its technology enables incredibly fast recharging; you can connect it to two 110W solar panels to recharge in as little as 4.5 hours.
Why buy: The EcoFlow RIVER Pro includes a wide range of best-in-class technologies. Offering 720 Wh of power with three pure sine wave AC outlets, and weighing only 15.9 pounds, these units are well-suited for camping and hiking, as well as use around the house. You can also add an additional EcoFlow battery pack to upgrade the power of your generator as needed.
Renogy PHOENIX 300
renogy.com
Renogy produces several different power stations and chargers, but we especially like the PHOENIX 300, a solar power solution that's extremely lightweight and compact. It comes with an easy-grip handle and only weighs 6.4 pounds, making it one of the most portable solar generators around while still offering up to 200W of AC power for off the grid activities.
Why buy: The PHOENIX 300 can provide 337 watt-hours for up to 8 hours of AC continuous power without the noise or fumes associated with gas generators. It includes a number of the most common charging ports like two AC adaptors, a USB-C, USB-A, USB, and a D-Tap port for photography equipment.
Suaoki S370
suaoki.com
Suaoki is a company that's known for simple, functional, reliable technology. Their S370 portable solar generator isn't necessarily flashy, but it's an extremely lightweight option, perfect for camping, hiking, and other outdoor adventures. It includes 14 outlet ports and a pure sine wave inverter, making it a versatile power option.
Why buy: This is one of our top picks for camping and hiking, though it may also serve your needs as a backup power station for small appliances and electronics. A lithium-ion battery gives this generator an incredible capacity battery life, particularly in relation to its compact size.
Jackery Explorer 300
jackery.com
Jackery's portable power stations are ideally suited for camping and hiking. The Explorer 300 offers great portability and fast rechargeable power at an affordable price. It includes two AC outputs, a USB-C, USB-A, USB ports, and a 12-volt car port.
Why buy: The Explorer 300 generator is a good option for those who are new to solar power, thanks to its low price and easy-to-use controls. Jackery offers a number of portable solar panel options, and the power station's MPPT technology means that it can be recharged from the sun in just 5.5 hours.
Westinghouse iGen200s
westinghouseoutdoorpower.com
There are plenty of reasons to consider the Westinghouse iGen200s portable generator. This is one of the more affordable options on the market today, which makes it a good entry-level solar power solution. The unit offers four charging options. You can recharge with solar panels, with the power from your vehicle, with a household power outlet, or with a separate generator.
Why buy: For a simple and inexpensive solar power generator, Westinghouse makes an outstanding product. You can charge up to nine devices at a time; and, depending on how you use it, you can potentially get more than 40 hours out of your generator.
What Types of Batteries Do Solar Generators Use?
It's important to note that solar power generators may employ different kinds of batteries. The most common option is the lithium-ion battery. These tend to be more expensive than lead-acid batteries, at least on the front end. With that said, a lithium-ion battery will prove more durable, which usually makes it the smarter investment in the long run. Solar generators include charge controllers, which regulate the volts of energy coming from the solar panels to the battery to make sure the battery isn't overcharged and damaged.
The energy stored in the battery is converted from DC power into AC power using an inverter or adapter.
What Can You Power With a Portable Solar Generator?
There are different types of solar generators. A backup generator is primarily used to power your home, should your electricity go out. In this article, we focused on portable generators, which are mostly used for hiking and camping. With that said, a portable generator can also be really useful during power outages, potentially keeping your lights, electronic devices, and small devices or appliances on for several hours. Depending on the watts of power your solar system generator kit can support, you can use it to power things like phones, tablets, laptops, TVs, coffee makers, a mini-fridge, certain medical devices, and most anything you would plug into a car charger.
Some of the generators we've listed here can be charged by solar energy or via other sources, including vehicles and power outlets. These different charging solutions make a generator more versatile, though of course, solar energy is what you'll want to use if staying away from fossil fuels is your goal.
What are the Benefits of a Portable Solar Generator?
There are a number of reasons why you might consider a portable solar generator:
- These units are ideally suited for camping and hiking. The ones on our list range in weight from under 10 pounds to over 50, but they are all fairly easy to cart around as needed, or to keep in your camper or RV.
- Though they are not primarily intended to be emergency backup generators, they can certainly be used in that capacity. In particular, they can provide emergency power to important medical devices as well as phones and computers.
- Unlike gas generators, portable solar generators offer power without making a lot of noise or creating a lot of fumes. This makes them much more appealing for campsites.
- Portable solar generators are better for the environment, since they don't rely on gas or diesel fuel to run.
- Using a solar generator is ultimately more cost-effective as you will never need to purchase fuel to recharge it.
Solar Power Can Take You Further
Solar power is one of the best options for dependable, renewable energy. Not only can it help power your house, but you can use these portable generators to carry that power with you, wherever you may go.
There are clearly lots of options on the market today. We hope our guide is helpful to you as you assess our own backup power needs, and as you determine which portable solar generator will give you the greatest value. Note that you can find many of these solar power options through third-party retailers like Amazon. Do your due diligence as you seek the perfect, portable solar solution for you and your family.
Josh Hurst is a journalist, critic, and essayist. He lives in Knoxville, TN, with his wife and three sons. He covers natural health, nutrition, supplements, and clean energy. His writing has appeared in Health, Shape, and Remedy Review.
We can learn a lot about the health of freshwater habitats overall by studying the animals that live in them. If freshwater animals are on the decline, that's a sign that the entire ecosystem is in trouble. Freshwater habitats face a host of threats, including increases in the amount of water we take from them; drainage of wetlands; pollution from industry, sewage and farms; invasive plant and animal species; climate change; and infrastructure development in and along waterways.
Perhaps the most urgent threat to freshwater animals and their homes is the dams, bridges, roads and other infrastructure that interfere with the natural flow and connectivity of rivers. Many freshwater fish, for example, rely on free-flowing rivers to eat, reproduce and access nutrients necessary for their survival.
Connected rivers help people, too. Free-flowing rivers move sediment to floodplains and deltas downstream, providing nutrients and soil for floodplain agriculture, allowing for healthy fisheries and supporting the resilience of delta habitats under a changing climate.
Keeping Rivers Connected and Flowing
There are currently nearly 60,000 large dams on rivers around the world and more than 3,700 more hydro dams—structures that give us energy from the flow of water—are planned globally. While hydropower plays an important role in today's renewable energy revolution, it must be carefully planned so as to minimize loss of river health.
This means considering the health of an entire river basin to find energy opportunities with the least amount of impact on the environment and people. Into the future, the dropping prices of wind and solar power, along with innovations in the ability to store power, provide the possibility for countries to meet energy demands with less hydropower and therefore fewer dams.
We can also set aside a certain amount of water in a river basin exclusively for the protection of nature and for people. Called a "water reserve," this concept requires a careful calculation of how much water people can use for energy, agriculture and other purposes and how much must remain in the river to sustain a healthy ecosystem.
This summer, Mexico authorized water reserves in nearly 300 river basins, including in one of the country's longest remaining free-flowing rivers, the Usumacinta. WWF worked with Mexico's National Water Commission to calculate how much water could be allocated to human activity and how much water should remain in the river to sustain a healthy ecosystem. This science-based planning and policies backing it up ensure water quality and quantity for 45 million Mexicans for the next 50 years—all while protecting the river's plants and wildlife.
You Can Help
The decline in groups of freshwater animals is staggering, but we can help reverse the trend. Join WWF's Freshwater Force to take action to stop bad dams and infrastructure development in freshwater habitats, raise awareness of the importance of freshwater, and champion the wildlife and communities that depend on free-flowing, clean rivers for survival.
Earth Hour 2018: Globe Unites to Celebrate People’s Connection to Planet https://t.co/B66o5zcVjS @GreenpeaceUK @wwwfoecouk— EcoWatch (@EcoWatch)1522149013.0
The historic decision came this week during a World Heritage Committee meeting in Bahrain, just five months after the Belizean government imposed a moratorium on oil exploration and drilling in all of Belize's offshore waters—a landmark piece of legislation that protected critical ecosystems and established the country as a new world leader in ocean conservation.
"At time when we are seeing numerous threats to World Heritage sites, Belize's government has taken real action to protect one of the world's most special places," said Marco Lambertini, director general of WWF International. "We have seen an incredible turnaround from when the reef was being threatened by seismic testing for oil just eighteen months ago."
Comprised of seven protected areas, Belize's Barrier Reef System is the second-largest reef system in the world and is home to nearly 1,400 species, from endangered hawksbill turtles to West Indian manatees, sting rays, coral and six threatened species of sharks.
Nearly 200,000 people—more than half Belize's population—rely on the reef to live. Reef-based tourism and recreational activities provide vital sources of income and account for an estimated $200 million of Belize's GDP, while commercial fishing contributes about $15 million. The reef also provides important natural protection against damages from extreme storms along the coast.
The Belize Barrier Reef System was first inscribed as a UNESCO World Heritage site in 1996 in recognition of the site's incredible biodiversity and cultural significance. But in the last decade, exploration for oil, development along the coast, and a lack of strong regulations have posed increasing threats to the fragile ecosystem. The reef site was added to UNESCO's List of World Heritage in Danger in 2009 due to the threat of irreversible damage from harmful coastal construction and oil exploration.
Last year, more than 450,000 people from around the world joined WWF and other organizations—including Oceana, the Belize Tourism Association, Belize Audubon Society and Belize Institute for Environmental Law and Policy—to campaign against proposed oil exploration near the World Heritage site. They signed petitions, wrote letters, and used social media to urge the country's government to secure the long-term protection of the barrier reef.
Antonio Busiello / WWF-US
Their hard work payed off.
In December 2017, Belize agreed to put an end to oil exploration in its waters and began to secure the region against immediate threats—a critical step towards protecting the reef, its species and the people who rely on it. Belize is now just one of three countries in the world with such legislation.
"Belizeans stood up to protect their reef, with hundreds of thousands more globally joining the campaign to save our shared heritage. In taking swift collaborative action, Belize has shown that it is possible to reverse nature loss and create a sustainable future," added Lambertini.
Belize also recently adopted critical regulations to protect the country's mangroves and announced that it would begin to phase out single-use plastics like plastic bags, utensils, and take-out containers that threaten species and delicate ecosystems.
But there's still more work to be done to ensure that Belize's barrier reef and the rest of the World Heritage sites—and the 11 million people they support worldwide—continue to be protected for future generations.
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"Once again, the people have spoken through Earth Hour," said Marco Lambertini, director general of WWF International. "The record participation in this year's Earth Hour, from skylines to timelines, is a powerful reminder that people want to connect to Earth. People are demanding commitment now on halting climate change and the loss of nature. The stakes are high and we need urgent action to protect the health of the planet for a safe future for us and all life on Earth."
From Colombia to Indonesia to Fiji, Earth Hour 2018 mobilized people to join efforts to protect forests and mangroves. In Romania, hundreds of people showed their commitment to safeguarding nature by writing symbolic letters to rivers, forests and wildlife. In Africa, 24 countries celebrated Earth Hour to highlight the most pressing conservation challenges they face such as access to renewable energy, freshwater resources and habitat degradation.
Earth Hour 2018 celebrations in ScotlandWWF
This Earth Hour, for the first time, people across the globe also joined the conversation on connect2earth to share what nature means to them, in the places they live in and care about. The platform, created in partnership with the Secretariat of the United Nations Convention of Biological Diversity and supported by Germany's Federal Ministry of the Environment, Nature Conservation, Building and Nuclear Safety with funding from the International Climate Initiative, aims to build mass awareness on the values of biodiversity and nature to our lives, health and well-being.
"The science is clear: the loss of nature is a global crisis. Wildlife has declined by close to 60 percent in just over 40 years. Our planet is at a crossroads and we cannot have a prosperous future on a depleted, degraded planet. Together as a global community we can turn things around. People must mobilize and join governments and companies toward stronger action on biodiversity and nature—the time to act is now," added Lambertini.
The impacts of accelerating biodiversity loss and climate change on the planet are profound, as are the consequences for humanity. As French President Emmanuel Macron stated in a special message for Earth Hour, "The time for denial is long past, we are losing our battle against climate change and the collapse of biodiversity. If this trend continues, our planet's ecosystems will collapse, along with the clean air, water, food and stable climate that they provide."
To drive further global awareness and action on nature and the environment, WWF has also joined forces with the World Organization of the Scout Movement this Earth Hour. The energy and voices of 50 million scouts worldwide send a resounding message to decision-makers worldwide that the time to act on nature, for nature is now.
WWF and Earth Hour teams around the world will continue to empower individuals, communities, businesses and governments to be a part of environmental action. In his video statement for Earth Hour, UN Secretary-General António Guterres reiterated the need for people to work together to build a sustainable future for all. Strengthened by the support shown, teams will renew the charge to tackle issues such as sustainable lifestyles, deforestation, plastic pollution and ocean conservation across continents.
Earth Hour 2018 celebrations in RussiaWWF
Earth Hour 2018: Facts and figures (based on initial estimates on March 25, 2018):
- 188 countries and territories focused on environmental action and issues such as protecting biodiversity, sustainable lifestyles, deforestation, plastics and stronger climate policy;
- Lights out at around 17,900 landmarks including the Sydney Opera House (Sydney), Big Ben and the Houses of Parliament (London), the Tokyo Sky Tree (Tokyo), the Empire State Building (New York), the Pyramids of Egypt (Cairo), Sheikh Zayed Grand Mosque (Abu Dhabi), Christ the Redeemer statue (Rio de Janeiro) and the Eiffel Tower (Paris);
- 3.5 billion + impressions of official campaign hashtags between January and March 2018. Related hashtags also trended in 33 countries;
- Around 250 celebrities and influencers worldwide also raised their voice for the planet including Andy Murray, Jared Leto, Ellie Goulding, The Killers, Amitabh Bachchan, Li Bingbing, Park Seo-joon, Claudia Bahamon and Roger Milla;
- Earth Hour partners include Zinkia Entertainment Ltd, creators of popular cartoon character Pocoyo, and crowdsourcing platform Userfarm.
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