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With electricity prices rising, many of us are looking for all the free electricity we can get. While portable solar panels and chargers aren’t powerful enough for heavy-duty tasks like heating a water tank or using large appliances, they can charge phones, tablets, and laptops using only sunlight.
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Although battery technology is constantly improving, our electronic devices are becoming more and more energy intensive, which means that the average phone battery life is only one day. This means it’s more important than ever to carry a solar charger or solar panel with you when you’re hiking, unplugging, or traveling outdoors with your favorite tech.
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Advances in technology mean that today’s solar panels are smaller, lighter and more efficient than ever before. Chargers that were once too big to carry around can now be folded up to fit in a travel case or hung in the back of a backpack while hiking. As long as you have enough sunlight, the best sunscreens can extend the life of your phone, headphones, and laptop indefinitely.
Some solar chargers can be connected directly to your phone to charge it, but since most panels don’t store power, it’s best to connect solar chargers to a separate battery and charge your devices from that. For this reason, most solar chargers come with rechargeable batteries.
Solar chargers are often used at backcountry campsites, festivals and wilderness hikes, but they are also used to keep the batteries of cars, motorhomes and boats running when not in use. Anyone with a motorhome or shed that isn’t connected to electricity can use inexpensive solar panels to keep a portable power plant running, meaning there’s always free current in the tank when you need it.
We tested these solar panels and chargers during the summer months in the UK. Productivity is reduced by about 20 percent during the winter months, as even on a clear day the sun is low on the horizon and therefore weak. Thank you very much science.
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We’ve tested a range of solar chargers in a variety of uses, from large, compact models capable of charging multiple devices at the same time, to portable power packs with built-in solar panels. We tested them in changing weather conditions in the south of England, as well as hiking and at a festival in Portugal (our tester had access to wall power, of course, but for testing purposes they went outside as much as they could). These are the ones that really shine.
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The Goal Zero nomad 20 is a flat and highly portable solar charger designed for hikers and campers who want to travel light but need more than a basic 5W panel. Half a meter wide when unfolded and weighs less than a laptop, it has an adjustable stand to point it directly at the sun when it’s on the ground. The durable plastic frame has attachment points in each corner so you can tie it to your bag or secure it where you need it.
We liked that the USB output is on a slightly flexible bracket, which helps keep the charging cables from fraying. You can also connect multiple panels with the built-in 6ft cable for faster charging.
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This very compact 5W solar panel is a one-stop solution, and unlike other solar chargers on our list, it has a built-in 2200mAh battery. That’s enough to charge your phone once, and it’s all you need in an emergency.
It has a simple wire kicker that can be lowered with rope like a backpack, tied to a tree branch, or used to support a panel high on the ground. Eyelets at the bottom corners also prevent slipping in the sun while walking. We love the incredibly simple sundial in the corner of the unit, which allows you to precisely aim the panel directly at sunlight for optimal performance.
Ecoflow 220W is a special solar panel that produces ten times more water than the next one in our range. This makes it slightly more portable, but also more useful for charging the specialized batteries needed to power small appliances in camping, rental housing, caravans, and emergency home support in the event of a power failure.
The solar panel is double-sided, meaning there is a second 155W panel on the back side. This allows it to draw a small amount of extra current by absorbing ambient light in bright environments, allowing for better power distribution in changing weather conditions and less wear and tear on an expensive device.
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We tested a 220W panel and an Ecoflow EF3 Delta power plant, a 14kg battery pack with four USB-A ports (two for fast charging), two USB-C ports, and four three-socket outlets. The station can be charged slowly with a solar panel or in less than two hours of electricity.
The large 28W output of this BigBlue solar charger allows it to provide continuous charging even in cloudy conditions, making it ideal for charging batteries, smartphones and tablets while hiking and camping. The 4-panel charger includes a digital ammeter to monitor amperage and the ability to detect the voltage and resistance of the battery connected to it to prevent overheating or damage to the electronics.
It folds down to the size of a piece of paper, but is easy to attach to the top of your backpack when open to charge up to two devices on the go.
Decathlon’s Trek 500 is a 10W single USB solar charger that’s perfect for charging batteries while traveling or camping. Decent power output puts this flexible panel somewhere in the middle of the range, delivering more power than a small charger, but less than a large, expensive solar panel.
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The dual-panel design packs neatly into a fabric bag and attaches securely to your backpack with the included carabiners and eight attachment points. A reliable charging solution that bridges the gap between cheap and slow panels and serious hardware, the trek 500 is ideal for casual hikers and long distance travelers.
This BigBlue Quad Panel Solar Panel is a foldable solar charger with an incredible 28W power and can simultaneously charge three 5V low power devices via three USB-A ports. With enough power to slowly charge tablets and other portable devices that use a lot of water, this solar charger has a flexible design that can be conveniently hung on your back while traveling, in a camping tent, or on a window frame for home meals. It comes with carabiners to attach it to your backpack or frame.
It’s a 25,000 mAh rechargeable battery with four solar cell panels that generate enough photonic juice to recharge the battery’s energy reserves over time. These portable chargers are limited by physics, that old killer thing, so don’t expect pathetic panels to put out enough power to power a laptop or run completely offline. They will fully charge the battery in a few days of bright sunny weather.
However, if you need an external power bank with a built-in LED flashlight that can stand in the background while setting up camp and fighting bears, this is a useful little device to have in your backpack.
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If your car battery tends to dry out when not in use for a long time, you need a solar powered car battery. Even in the UK’s anti-photonic climate, a solar panel attached to the inside of the windshield can draw enough charge from the battery to keep it fresh and ready to go.
This 10W solar panel can be placed inside a car, but is waterproof and strong enough to be placed outside for better performance. It attaches directly to the battery using alligator clips or can be charged from the cigarette lighter if the car’s electrical system allows it. The power output is designed to charge large batteries such as those found in boats, ships and trucks.
Before buying a solar charger, it is important to consider what type of trip you will be using it for. In general, there are three factors to consider: production volume, surface area, and panel flexibility.
While performance varies from model to model, most models can last more than three years, with more premium models claiming a 25-year lifespan.
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Yes, but the amount of energy received by the panel will be significantly reduced, especially if the glass is tinted or has UV protection properties. According to Sol Volatics, a website that gives advice on installing solar panels,
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