Our experts have been rigorously testing the best portable solar chargers and panels since 2013 and have personally tested over 100 individual models. For this year, we purchased the 17 most promising and popular portable solar panel models for in-person testing. While assessing each panel's charging abilities, we narrowed in on the best to highlight and test side-by-side. From 50-watt solar panels designed for serious expeditions and car camping to pocket-sized battery combos made for the backcountry, we've hands-on tested tons of portable solar chargers. We test each model to see which ones live up to their claims and which are all talk. Whether heading out for a weekend or living in your RV, we've got some solar for you.
If you're looking for a larger solar panel for even more power on your next adventure, we also tested the top 100+ watt portable panels in our best solar panel for camping review. If you don't need solar but do need some power, check out these great portable chargers. No matter where you plan to roam, we've got you covered with our full camping list that outlines our favorite gear, from lanterns and tents to camping tables and chairs. solid state battery 1
The BigBlue SolarPowa 28 is our top choice for a portable solar charger because it balances portability and solar charging efficiency the best of any solar panel we tested. This model has impressive solar charging abilities in both direct sunlight and during cloudy days. And it weighs less than all but the smallest 5-watt panels. It unfolds into four solar panels quickly and easily, and it's light enough to prop up or hang off of just about anything to get an ideal charging angle to maximize efficiency. When your portable electronics need a charge, this panel delivers it more consistently than any other. It does better than most panels on cloudy days and has three USB-A outputs, so you can charge multiple devices simultaneously. When you're done charging, this solar charger folds into a small enough size to fit in just about any backpack. It closes with velcro and has a pocket where you can store charging cables, a battery bank, and other accessories. This is a great all-around panel for charging all your small electronic gadgets.
One downside to the BigBlue SolarPowa 28 is that, though it's relatively lightweight for the 20-40-watt panel class, it makes some sacrifices in usability to be as light as it is. We found that all of the panels we tested perform best when they can be angled directly at the sun, and this panel doesn't have kickstand legs to easily get that perfect angle. Weighing in at 20.9 ounces, it's lighter than most of the other panels in its class, but we would be okay with a few extra ounces for that extra usability. It is light enough to easily prop it on a rock, and it has carabiner clips to help prop it up, too. But this panel could be improved with a couple of fold-out legs. This is still a great solar panel overall and performs better than most other panels we tested in every category. This is the panel we'd choose for most applications where we want reliable solar charging, in an impressively small size, at a very affordable price. If you need more charging power than this, we recommend the 50-watt Goal Zero Nomad 50, or check out our review of larger 100-watt solar panels.
Read more: BigBlue SolarPowa 28 review
When you're outside in the sun, having a panel that charges quickly is key. The X-Dragon 20W comes at the lowest price with the most watts of any solar charger we tested. This 20-watt solar panel provides reliable, fast charging speed, almost as good as more expensive options, all at a reasonable price. The high conversion rate made the panel efficiently charge on sunny days better than most others, and it performs relatively well on cloudy days, too. It has two USB-A outputs that can each put out up to three amps, which is enough power to charge any USB device. Roughly the size of a notebook, this solar charger unfolds into three panels and has a zippered case that can easily hold two charging cables, a battery pack, and more.
Though the zippered pouch on the X-Dragon 20W makes storing your charging cables easy, it does make it harder to lay this panel completely flat on the ground. There is a canvas flap that secures on top of the mesh zippered pouch. This flap, along with the pouch, makes it so the panel sits at an awkward angle when you try to lay it flat. This isn't a huge deal, and it's easily fixed by propping it on another object, but all that extra material under one of the three panels makes it harder to deal with. But, if you're looking for an affordable solar panel to charge on the go, we think this is an excellent affordable choice for a portable solar charger. If you're looking for 10 extra watts and more charging power, we recommend you also check out the Anker Solix 30W Foldable, which is almost as affordable but rated as a 30-watt panel.
Read more: X-Dragon 20W review
The FlexSolar 40W is a high-output model that easily unfolds from the size of a large book into six solar panels. If you're looking for an easy-to-use solar charger setup that doesn't sacrifice wattage, this is our top choice. This doesn't have any velcro, magnets, or other clasps to deal with when folding and unfolding this panel, which makes it very easy to set up. And it's just as easy to take down when you're done charging. It has a DC output, which is capable of putting out 19 volts of power, so it's capable of charging portable power stations. It also has USB-C and USB-A charging outputs for your devices. We found during testing that the DC output on this panel could charge a 240-watt-hour power station faster than any other portable panel we tested with a DC output. It puts out an impressive amount of power while remaining relatively portable.
While the FlexSolar 40W does fold down into a small enough package, it's not nearly as light as some of the other portable solar chargers we tested. At 2 pounds 15.25 ounces, it weighs over twice as much as some other panels in the 20-40 watt range. However, it also weighs less than most 50+ watt panels we've tested, so it's more portable than a lot of solar panels out there. It lacks a cover for the DC and USB outputs, which is a weak point in terms of durability, but perhaps its only weak point. After extensive testing, we haven't had an issue with these exposed outputs, but it's certainly worth noting. This portable panel also comes at a very affordable price, considering it's a 40-watt panel that stows away quickly, and it's certainly worth considering for all your solar charging needs. If you're looking for a panel with a similar easy-to-unfold design that's slightly smaller, check out the BigBlue SolarPowa 30.
Read more: FlexSolar 40W review
The Goal Zero Nomad 5 is our top pick if portability is your top priority. This panel is small enough to take backpacking. It's incredibly thin and remarkably durable. Plus, it weighs well under a pound. This panel weighs less than many larger battery banks that you might otherwise bring on an extended trip, so it could feasibly save you weight in your pack. It doesn't fold but is thinner than average and has a single kickstand leg to angle it at the sun. This lets you maximize the efficiency of this 5-watt panel in a way that's much easier than it is with other small solar panels.
The Nomad 5 doesn't charge the fastest, but that's to be expected with a 5-watt solar panel. This is designed to charge a single small device, such as a battery bank. It only has a single output for this reason. Also, this panel doesn't have a place to store a USB cable, but if you're prioritizing packability, then you'll appreciate the fact that this doesn't have extra stuff that you won't use anyway. If you're looking for a super portable solar charger for the backcountry or something small, affordable, and durable for your daily life, this is worth a look. Or for a larger and more powerful but still portable panel, we recommend the SunJack 25W.
Read more: Goal Zero Nomad 5 review
We've been testing solar panels with integrated batteries for years, and most of the power bank/solar panel combos we've tried haven't performed well as solar panels. However, the Hiluckey HIS025 25000mAh Power Bank uses a newer design that makes it perform better as a solar panel. This power bank features a four-panel fold-out solar array. And while it still won't fully charge your entire basecamp, it will work better to keep your phone and other small tech topped off for a long weekend in the mountains. Each of the individual panels is only three watts, which makes a total of 12 watts for the whole setup. And when you aren't using this for solar generation, the panels fold flat against the battery bank into a small and compact package that can fit in your pocket. It has two USB-A outputs and a fast-charge compatible USB-C output as well. It also has a built-in light to illuminate your campsite at night.
Although the Hiluckey HIS025 25000mAh Power Bank works better as a solar panel than other single solar panel power bank combos we tested, it's still not as powerful of a solar charging option as a dedicated 20 to 30-watt solar panel. If you want the convenience of having an integrated solar panel, then this is our top choice. But, we think an inexpensive 30-watt panel, such as the Blavor 30W Foldable, paired with that battery bank you already own is a good alternative to a battery/solar panel combination like this one.
Read more: Hiluckey HIS025 25000mAh Power Bank review
In our lineup of the best solar panels for camping, we look at larger panels. The Jackery SolarSaga 100 continues to be both the best overall and one of the best value panels we've tested. This 100-watt solar panel is significantly more affordable than its competitors, user-friendly, lightweight, and performs well in both full and partial sunlight. It is the most efficient at rapidly charging electronic gadgets of any panel we evaluated, regardless of the weather. The SolarSaga instantly folds into a compact size and weighs only ten pounds which is light compared to similar wattage panels. The straightforward fold-in-half construction makes it very easy to transport it in your vehicle to take with you wherever you roam. The handle makes it easy to transport throughout the campground. You can swiftly deploy its fold-out legs to position it squarely at the sun and get the most out of its rays in the morning and evening. It has USB-A and USB-C ports and a DC output to connect directly to devices or an external battery. A built-in pouch with a zipper on the device's rear provides convenient storage for the hardwired DC charging cable and USB ports. It's a wonderful addition to your solar camping setup or if you want to have an off-grid backpack.
Although it's light and folds into a small footprint, the SolarSaga 100 only has a single fold in its design. Because of this, its folded size is significantly larger than some of the other high-wattage panels we examined. This is your panel if you want a high-capacity solar panel that offers excellent overall value for your upcoming camping trip.
Read more: Jackery SolarSaga 100 review
We've been testing portable solar chargers and panels for years and have put well over 100 individual products through our comprehensive testing process. With each new round of testing, we carefully select the most interesting, most popular, and most promising models and purchase them at full price. Then, we test each product objectively and thoroughly. During testing, we look at how quickly each model charges with different amounts of sunlight, how it handles multiple devices at once, the rate of charging, and its portability, durability, and overall useability. To test our metrics, we used each contender in the field and tested them in our backyard home lab. See additional details on our testing processes in our How We Test article.
Our solar testing team is spearheaded by Review Editor Sam Schild. Sam is a lifelong outdoor adventurer and off-grid explorer. Over the decades, he has spent thousands of nights under the stars, far from any power outlets. Sam has powered his bicycle rides across the country — more than once — and is a seasoned thru-hiker with numerous long-distance trails across America under his belt. He uses solar panels to keep himself connected to friends and family no matter where he roams, whether on his own two feet or with the aid of a pair of bike tires. Over years of using many iterations of solar panels and continually improved solar charging technology, Sam is intimately acquainted with the benefits and limits of powering devices from the sun. He tests solar panels large and small for GearLab, based out of wherever his feet are in the American West and Southwest.
Also joining our testing team is James Lucas, a long-time writer, editor, and photographer. As an avid climber who authored the Yosemite Valley Bouldering guidebook, you can find James outdoors more days than not. He spends his time documenting the outdoors and gear testing in Boulder, Colorado, and on frequent travels to California's Sierra Nevada mountains. James frequently uses solar panels to power his adventures and charge his camera gear when working out of his van in the Rockies and when perched atop sunny El Capitan in Yosemite.
With the growing solar market and all the technical jargon, it can be confusing to figure out what to buy. We will start by saying it can often be worth it to purchase from a reputable company with a clear warranty policy on its website. That way, if you end up with a dud, you can hopefully get your money back or a replacement.
We realize this can be confusing, so we're here to break it down for you. Watts (electric power) and amps (current) are two common units you will see listed for these products. Amps can be thought of as the amount of electricity moving through a given system. Volts can be described as the pressure that electricity is flowing with, think pressure exerted in a water hose. Watts is the cumulative power output from amps and volts that measures how much power and consumption you are drawing. Therefore, higher-wattage devices should deliver more power and charge devices faster, under the assumption that the devices are compatible with the amps and volts requirements.
Once you get an idea of charging capacity and your intended use for a portable solar charger, it's time to figure out what devices you plan on using. For smaller handheld items such as smartphones, a portable solar charger with five to fifteen watts should suffice. For those hoping to charge larger items such as laptops or multiple devices at a time, higher wattage panels with twenty to fifty watts of power are recommended. Factors such as duration of use, amount and intensity of sunlight, and how often you plan on charging your devices all play a significant factor in how quickly and efficiently your devices will charge.
The size will often be relative to output and charging capabilities. Deciding on the right size will depend on the type of use and trips you plan on using your solar charger for. Someone who plans on taking backpacking trips and just needs a little extra reassurance to charge their GPS device will want something small and light. For those who have the space and need a solar charger while on work trips or weekend outings, a charger with a bigger footprint will be best suited.
The amount of sun exposure and sun intensity can significantly impact a panel's charging capabilities. Consider the type of areas and climates you plan on spending time in. To produce peak charging efficiency, solar panels need adequate sunlight. Make sure to place your panels in ideal locations to capture sunlight and avoid running out of juice sooner than expected. Features such as kickstands and legs can help create a more optimal angle for charging.
We chose the best, most popular, and most promising portable solar panels on the market today to test side-by-side in this review. We tested every model under the same conditions to see which ones provided the most power and which were the most convenient to use. Whether you are looking for a solar setup for car camping or a compact charger to power your smartphone and GPS devices on a backpacking trip, our review offers excellent recommendations for anybody.
Dozens of companies produce affordable, effective monocrystalline panels ranging from small 5-watt models to more substantial, powerful options that will allow for a faster charge. Generally, the larger, higher-watt panels are going to cost more but will charge your devices faster and more efficiently.
The BigBlue SolarPowa 28 offers some of the best value overall. This 28-watt solar panel charges devices quickly, is portable, and costs less than many other panels that don't work as well. The X-Dragon 20W is also a great value. It costs less than any other 20-50-watt panel we tested but still works well to convert solar energy into electricity. The Goal Zero Nomad 5 is a less-powerful, 5-watt panel that won't charge as many things as fast but is exceptionally portable and easy to take with just about anywhere. It is incredibly light and portable and performed better in direct sun solar testing than most other smaller portable solar panels we tested.
We also tested quite a few battery banks with an integrated solar panel. Most of these options cost much less than solar panels without an integrated battery bank. Many of these items don't work nearly as well — several of them failed to generate a measurable charge during our 1-hour test. To get them to convert sunlight into energy, we had to have them perfectly angled into the sun and wait three times as long to get even the smallest measurable amount of charge. So, while these options are less expensive and come with an integrated battery, they aren't as good of a value when it comes to harnessing energy from the sun.
The main use for a portable solar charger is to power your device when you're away from power outlets. We took this into account when we chose to weight direct solar charging speed the heaviest in our testing metrics. It's also no surprise that some of our highest-scoring panels in this metric were chargers with the largest capacity.
We executed this experiment using a set of identical 10,000 mAh battery banks. We hooked up each panel to one of these battery banks and then set them in the sun for one hour. We then measured the amount of charge each panel created in milliamp hours using a digital multimeter. We performed this test three times on every panel and averaged the results.
The BigBlue SolarPowa 28 generated some of the most power in one hour of direct sunlight, an average of 1682 mAh. This 28-watt panel consistently put out power and even outperformed a few higher-watt panels we tested. The X-Dragon 20W also performed admirably in direct solar testing, generating an average of 1433 mAh in an hour.
We performed most of these tests with the panels lying flat on the ground for maximum consistency. During early morning and evening testing, though, we also performed some tests with the panels angled directly at the sun. We found that generally, when a panel is pointed directly at the sun, it performs better. So, when the sun is high in the sky, directly overhead, it's best to keep them flat on the ground. But when it's lower in the sky, near the horizon, you should angle the panel at the sun to achieve maximum efficiency. Also, when the panels aren't lying directly on the insulating ground, they stay cooler. And when solar panels are less hot, they work better.
We tested a few solar chargers that have DC power outputs, and these performed the best when hooked up to the DC power stations we used in our 100+ watt solar panels test. The FlexSolar 40W performed better when using its DC charging output, generating 2000 mAh in an hour compared to 972 mAh in an hour when using the USB-A port hooked up to the 10,000 mAh test battery.
The Goal Zero Nomad 50 generated an average of 1931 mAh over three tests, though it didn't perform noticeably better when hooked up to a larger battery with its DC charging output. The Goal Zero Nomad 20 also has a DC charging output, so it's capable of charging DC power stations as well, but this 20-watt panel only put out an average of 899 mAh in an hour and also didn't perform noticeably better when using the DC output.
The BigBlue SolarPowa 30 and Blavor 30W Foldable each have a DC charging port as well. Both of these panels performed better when charging a battery using the DC power output rather than the USB-A port. The BigBlue 30 put out an average of 1011 mAh using its USB-A port but 1600 mAh using the DC charging capabilities. The Blavor 30W put out nearly twice as much power using its DC output, 1200 mAh, compared to 681 mAh using its USB-A port.
During direct solar charge testing, we found that the portable battery banks with an integrated solar panel weren't nearly as efficient as the others we tested — the Blavor Qi 10,000mAh, the Mregb 42800mAh, and the Riapow 26800mAh were especially inefficient. This isn't to say that these panels don't work at all, but their conversion efficiency is incredibly low and slow. Not one of the integrated battery banks with a solar panel worked as well as the larger panels we tested. Additionally, we repeatedly had issues with these batteries overheating when placed on the ground in direct sun.
We found these panels really worked best only if you angled them directly at the sun. Even then, they're far less efficient than even the other 5-watt panels with slightly larger surface areas. We consider these panels as battery banks, first and foremost. The integrated solar panels on these shouldn't be relied on like you would any of the other panels we tested here.
During our first round of testing, we devised a separate test for these lower-watt portable solar chargers with integrated batteries. We left each of these panels to charge in the sun for three hours, hanging so they wouldn't overheat. None of the panels generated nearly as much power as the larger models, but they did generate some charge eventually. In three hours, the Mregb 42800mAh created 339 mAh, the Blavor Qi 10,000mAh generated 235 mAh, the Riapow 26800mAh generated 134 mAh. All four of these failed to generate any measurable charge during our regular testing, and we'd encourage people to think of them more as portable chargers than as highly functional solar panels.
This year, we added several more power banks with integrated solar panels, but this year's additions have fold-out solar panels. This means they have four times as much area to generate power from the sun than the battery bank and solar panels mentioned above. These panels, the Hiluckey HIS025 25000mAh Power Bank (313 mAh in one hour), QiSa 38800mAh Qi Wireless (434 mAh), and Blavor PN-W12 Pro (422 mAh) performed better than any of the other battery-panel combos in our standard 1-hour power generation test. The Hiluckey performed particularly well when angled directly at the sun, generating a respectable 495 mAh of power in one hour.
Over multiple years of testing, we've found that the battery bank and solar panel combos can work as solar panels if you're careful to keep the battery cool. After struggling to keep the battery from overheating, we found the slightly larger panel on the Mregb 42800mAh Power Bank created slightly more power than the smaller battery packs with a single integrated panel if we were able to keep it cool. The Mregb generated 201 mAh of power in one hour when angled in a way that keeps the battery off the ground and, therefore, cooler, and points the panel directly at the sun.
The BioLite SolarPanel 5+, which has a smaller 3,200 mAh battery bank, performed better than most of the battery banks without a fold-out solar panel array. It generated an average of 101 mAh in one hour. It has a much smaller battery capacity and looks a lot more like a solar panel than the four brick-style battery bank “solar panel” combos we tested. The Biolite 5+'s solar panel worked comparably as well as the other 5-watt solar panel we tested, the Goal Zero Nomad 5, but was less efficient overall. The Nomad 5 generated 384 mAh over one hour.
In this metric, we consider the following questions: is your panel going to quit on you just because one cloud passes overhead? To test this, we performed the same test we used to test direct solar charging with a white sheet suspended over all the panels to simulate a cloudy day.
Again, the highest-performing models in indirect solar charging speed were the ones with a larger watt rating. However, their performances do not directly correlate to overall wattage, with notable diversions where smaller panels converted more electricity.
Like in direct solar charging speed, the BigBlue SolarPowa 28 performed near the top in indirect solar charging testing, generating 872 mAh in an hour. The Sunjack 25W performed about as well, and generated 873 mAh of charge in one hour. These panels did better when charging under our while sheet cloud simulation than the larger 40 and 50-watt panels we tested. Compared to other similarly-rated panels in the 20-30 watt range, the SolarPowa and Sunjack blew the competition out of the water.
Unsurprisingly, the solar chargers with large surface areas did better in this metric because there are more cells exposed to the sun at one time. The Goal Zero Nomad 50 did well in indirect solar testing, generating 626 mAh of charge in an hour. This panel is massive, so it stands to reason that it would do at least okay in less-than-ideal conditions where every bit of solar power is needed.
The X-Dragon 20W generated 676 mAh in one hour, which is quite impressive for a 20-watt panel. Compared to the other panels we tested of similar wattage (in the 20-25 watt range), this performance is better than the competition. It even performed better than the FlexSolar 40W, a 40-watt panel that put out 461 mAh in one hour.
The Goal Zero Nomad 20 proved to have less of a decrease in power generation from direct to indirect light than almost any other panel we tested. Though its output isn't quite as impressive as other 20-watt panels we tested, this increased consistency across weather conditions is notable and appreciated. And though it wasn't the most impressive panel of its watt size, it generated 262 mAh in one hour.
The BigBlue SolarPowa 30 also performed well in direct solar charging. The panel, which has a built-in ammeter that helps to maintain consistent power in inconsistent conditions, generated 717 mAh of power in one hour. We were a bit surprised that this panel didn't perform better, since the BigBlue SolarPowa 28, which doesn't have an ammeter, has performed so well in the past. However, in this year's side-by-side testing, the tried and true original BigBlue 28 performed better under our simulated cloud cover sheet than the newer BigBlue 30.
The Anker Solix 30W Foldable also performed well in indirect sunlight, generating 630 mAh of power in one hour.
Disappointingly, if perhaps not surprisingly, all four of the battery banks with a single solar panel combo units — the Blavor Qi 10,000mAh, Mregb 42800mAh, and Riapow 26800mAh — failed to generate any charge at all during our indirect sunlight tests. This solidifies them, once again, as portable battery banks, first and foremost, with unreliable solar charger performance.
The newer battery banks and solar panel combos to the testing lineup performed better than the battery banks with a single panel. These panels didn't generate a lot of power in one hour, but they generated a measurable amount. The Hiluckey HIS025 25000mAh Power Bank generated 182 mAh, the QiSa 38800mAh Qi Wireless generated 212 mAh, and the Blavor PN-W12 Pro generated 55 mAh of power in one hour.
We looked at each model's portability in terms of packed size and weight. Some panels fold down into a small package but aren't very light, while others are lightweight but don't fold at all.
We considered how easy each portable solar charger is to set up and take down. We considered if they have storage solutions for your cables or features that make them easier to pack into a backpack or bring along on a camping trip.
The lightest models we tested were some of the battery banks with integrated solar panels. The Blavor Qi weighs significantly less than any other model we tested, 9.3 and 8.7 ounces, respectively.
Both of these battery banks with integrated solar easily fit into a pocket or clip to the outside of your backpack. But as we discussed earlier, these should be considered battery banks more than solar panels. The solar panels on all the brick-style battery banks really aren't big enough to rely on for solar power generation. While their low weights make them portable in this lineup, there are other portable chargers we've tested without solar panels that are lighter.
The Goal Zero Nomad 5 stands out for its portability among the rest of the lot of solar panels. This panel weighs a mere 12.4 ounces and is incredibly thin. It easily slides into any backpack, no matter how full it is. You can strap it to the outside of your pack if you want to get some charge while on the move and lean it against just about anything when you get to camp. This panel doesn't fold, and it could be smaller if it did, but then it would have more heavy material and less total area for the actual solar panel. This panel strikes the perfect balance between ultralight weight consciousness and solar efficiency.
The BioLite SolarPanel 5+ is another highly portable option. It weighs 13.4 ounces and is about the same size as the Goal Zero Nomad 5. The BioLite 5+ also has an integrated 3200 mAh battery, which makes its low weight and small size even more impressive.
The Blavor PN-W12 Pro (20.9 ounces), Hiluckey HIS025 25000mAh Power Bank (18.7 ounces), and QiSa 38800mAh Qi Wireless (19.5 ounces) all weigh a similar amount. And these all fold down to about the same size as well — slightly smaller than an actual brick. And since these panel and battery bank combos work better as solar panels, so their portability is even more impressive.
The BigBlue SolarPowa 28 is the most portable panel we tested that's larger than 20 watts. This panel folds down to about the size of a notebook and weighs 20.9 ounces. It's more than light enough to throw in a backpack or on your bike to charge your devices anywhere. Compared to the Goal Zero Nomad 5, it weighs almost twice as much but packs serious charging power. On the other hand, compared to the beefy Goal Zero Nomad 50, which weighs 110.4 ounces, the SolarPowa 28 feels practically featherweight.
The X-Dragon 20W is almost as light as the BigBlue SolarPowa 28 and about the same size when folded, too. The X-Dragon also has a large storage pocket, which makes it slightly easier to stay organized when you're transporting your solar charger. It has a large zippered pouch for storing cables and a battery bank protected by an extra flap of canvas. The canvas flap secures over the mesh pouch with velcro.
The FlexSolar 40W isn't the lightest panel at 47.3 ounces, but it does fold down very quickly and easily, making it notable despite its size. It's the easiest to pack away of any folding panel we tested, so it is more portable than its weight may make it seem. Once folded, it becomes a compact package. However, it lacks cable storage or charging port protection, which we don't love.
The SunJack 25W also folds and unfolds quickly, much like the FlexSolar 40W. But the SunJack only weighs 29.4 ounces, which is much lighter than the FlexSolar. This isn't quite as light as the BigBlue SolarPowa 28 or X-Dragon 20W, but it's more than light enough to carry around. We also appreciate that it has an excellent zippered compartment to store cables and a battery bank, which makes it that much easier to stay organized.
Some solar panels are easier to use than others. We evaluated many aspects of functionality in our testing of portable solar chargers. We looked at the number of devices each panel can charge simultaneously, integrated battery capacity, other charging options, and anything else that makes these panels more user-friendly.
As you might guess, when tasked with the challenge of charging multiple devices at once, the more powerful models performed better than lower-wattage models. Smaller panels, such as the 5W models, don't have the power to sustain two gadgets at once. If this is a priority for you, then select a panel with a higher wattage.
The BigBlue SolarPowa 28, SunJack, Goal Zero Nomad 50, and FlexSolar 40W all did a good job charging multiple devices at once. After so many rounds of testing these portable solar chargers' ability to juice multiple devices at a time, for the most consistent results, we recommend not doing this. Instead, it's generally more effective and efficient to use your solar panel to charge a battery bank and then charge all your devices off of that battery.
Solar chargers with built-in battery packs excel in charging multiple devices at once, but we really consider these just battery banks, so that's to be expected. The Blavor Qi and Riapow are capable of charging compatible smartphones wirelessly as well. This is a useful feature, as it allows you to leave your cables at home, further cutting weight and system complexity.
Beyond multiple device charging, several of the panels we tested have multiple types of outputs, which help to charge a variety of devices. The Goal Zero Nomad 50, Goal Zero Nomad 20, FlexSolar 40W, BigBlue SolarPowa 30, and Blavor 30W Foldable all have USB-A outputs and DC outputs, so you can charge more types of battery banks, including portable power stations. You can also connect multiple Nomad solar panels together to increase power output. You can even mix and match many of the Nomad sizes and models (though not the small, Nomad 5) to create larger stations pulling more power from the sun.
All of the Goal Zero Nomad panels have kickstand legs that make it easy to angle them directly at the sun. The BigBlue SolarPowa 30 also has a kickstand leg for this purpose. This greatly improves solar efficiency when the sun isn't directly overhead, so you can maximize sunlight in the mornings, evenings, and during non-summer months.
The BioLite SolarPanel 5+ also has a kickstand leg. Uniquely, this model has a sundial to help take the guesswork out of pointing the panel directly at the sun. The integrated battery on the Biolite makes it possible to keep a small charge for when the sun goes down, but its limited capacity isn't enough to fully charge most modern smartphones. However, in an odd twist (in our opinion), there is no way to bypass the battery bank. So if the battery doesn't have a charge, you'll have to wait for it to charge before you're able to charge your device.
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