The BigBlue 5V 28W Solar Charger Panel Review

Categories: Review and Solar PV Panels.

The BigBlue 5V 28W Solar Charger Panel is a rugged, durable, weatherproof phone and tablet recharger.

BigBlue 5V 28W Solar folding panel

You can charge up from the USB off its solar panel. It keeps those devices like cameras, phones, kindle, GPS and tablets charged, in all kinds of weather.

The BigBlue 5V 28W solar energy charger comes with digital ammeter dual USB port, foldable solar charger with waterproof Sunpower solar panels.

The BigBlue 28W are ideal for charging your USB compatible cell phone, iPhone, and portable accessories during hiking, backpacking and outdoor camping.

If you want to know where this portable charger ranks, I have reviewed a group of portable chargers in other blog posts and collectively in a buying guide.

Features Of The BigBlue 5V 28W

Built-in Ammeter and Chip:

  • The solar charger has a digital ammeter that shows the amount of Amps present
  • The internal chip assures a stable charge rate

Wide Compatibility:

  • There is an attached micro USB cable for almost all the Android devices and even some of the digital single-lens reflex cameras
  • You will need extra cables for some other specialist device types

Safe Charge:

  • SunPower Solar Panels provide high solar conversion efficiency

The BigBlue 5V 28W Solar Charger  is portable at 23.5 oz but not the lightest in class:

  • It’s easy to carry when it folds to the size and thickness of an exercise book

Robust Design:

  • Used for trekking, hiking, climbing, picnics, etc
  • Ideal for outdoor activities needing power such as camping, boating, fishing, cycling, etc

Special PET Polymer Surface:

  • This protects your solar panel and your devices from occasional rain or wet fog
  • Waterproof to IPX4 level. (i.e. resistant to water splashes from any direction)
  • Keep it away from water when you have any devices on charge

Package & Warranty:

  • BigBlue 5V 28W uses industrial-strength PET polymer fabric
  • 24-month warranty on the complete package

BigBlue Flashlight And Battery:

  • BigBlue 5V 28W lacks useful built in features like flashlight or Solar Battery

BigBlue Solar Charging

This portable solar charger is user-friendly, and compatible with all USB rechargeable devices. This inexpensive charger operates on sun energy so produces 100% green power and has amazing 21.5% to 23.5% solar efficiency. 

Unfold the charger panels and place the BigBlue 5V 28W unit wherever you can access direct sunlight and the portable solar charger panels get to work. It even charges your device in partly cloudy conditions. You can relax, admiring the panorama as you charge your cell phone, tablet, GoPro, GPS or camera.

Built-in Ammeter and Pocket with Zip

BigBlue 5V 28W Solar Panel

The BigBlue 5V 28W folding panel package includes 4 clip hooks, which allows you to hook your solar panel everywhere convenient to get solar access (trees, backpacks, vehicle, etc.) It is bulky when it is unfolded, and with all its features it is slightly heavier than less powerful units in the portable range, albeit there is no inside solar battery for storage included in that weight.

The panels are rated as waterproof but this is rating is for splashed water and intermittent rain showers. An internal chip ensures that when the panel loses contact with sunlight for a period of time (walking through dense forest, rain cloud shadow, intermittent shadow from placing it on a moving backpack), it will stop charging until he comes back into contact with the sun's rays, without damaging your connected device.

The built-in ammeter and the pocket with a zip will keep your devices safe and clean while they are being charged. Remember that Apple devices have a chip that closes the phone down and stops the phone charging whenever its inner temperature get too hot. 

An overheating situation may occur, even when it's inside the BigBlue's zip cover if you have the solar panels together with the charging phone out in full sun. You might save the phone from overheating by using a longer USB cable and keeping the phone in shade, either a ventilated area or insulated inside a backpack. You need to place the solar charger's panels in full sunlight, without shade and obstacles that may cause an intermittent shadow.

Customer Feedback

Most customers gave the device a good rating. The rating was 4.2 out of 5 stars.

Here are some of the comments about the BigBlue 5V 28W:


  • "I have tested 5 different folding solar chargers and this one is good or better than most. This 28-watt (4 Fold) version is capable of charging 3 devices. It has a rubber weather protector over the USB ports to protect from water and dust."
  • "I like the soft tie downs on this charger that give a little bit more flexibility for attaching this panel to a tent, tree, or backpack."
  • "This 28-watt solar charger has only 3 USB ports. That is actually a good thing. 3 Ports is the right size for a 28watt solar charger."
  • "I tested this charger outside in the late afternoon sun on a late September day in fall and I was able to get 3.1 Amps reliably out of it."
  • "Built rugged, the description says its waterproof but I haven’t tested that out yet. Love the carabineer clips to secure the panel; an amazing piece of technology."
  • "This solar charger works well and would be a great choice for anyone looking to buy a solar charger. Just decide how many devices you want to be able to charge. If you want to be able to charge 3 devices, get the 28-watt charger; it will be more than adequate."

Very Positive:

  • "I took my solar charger with me to the beach and decided to charge my phone, which was at 15% battery. After plugging in my phone to one of the three USB ports it instantly started charging. I was absolutely amazed by this solar charger’s ability to charge my phone as fast as a wall charger. In an hour my phone was 80% charged from an ultra portable, super practical solar panel that will provide you with free electricity anywhere you go."
  • "This gadget starts to charge while my other portable solar cells wait for the sun to get higher in the sky. It somewhat charges on cloudy days while my other units won't."
  • "It charges tablets and smart phones fast in direct sunlight, much faster than my previous Goal Zero."

Not so Positive:

  • "After less than 20 days it died. Left this solar panel in full sun, which melted the charge controller."
  • "It doesn't have a battery pack to store energy. I have gone and bought a separate charger/external battery pack to use with it. I leave it on my car dash to charge the new battery pack so when I get back to the car I've got power waiting for me, even if it's already dark. Great buy."


We highly recommend the BigBlue 5v 28w solar charger.

The BigBlue Solar Charger with Digital Ammeter and two USB Ports is an efficient compact foldable solar charger; a great portable solar charger for both backpacking and sit-me-down camping, even if it rains. The Sunpower solar panels are waterproof but the USB connections are only splash proof.

It's your portable solar support for the must-have gadgets that you take on walks; the essential smartphone, cameras, tablets, GPS and similar portable on the move whatnots.

It doesn't come with an inbuilt battery but you can option to buy compatible rechargeable battery storage. The BigBlue 5v 28w solar charger could boost your portable battery storage on one of its USB ports for later use while your phone or GPS is plugged into the other USB. We recommend however that with many of the multiple outlet units that you charge one device at a time to achieve maximum efficiency from the charger.

The BigBlue 5v 28w solar charger is a great little portable charging unit for your mobile phone or USB gadgets during backpack hiking, trekking and camping.

To get one of these solar chargers, or find the current price, click on the red button below.

Feel free to share this blog and leave a comment. It will be good to know your experience. I hope that you explore and also enjoy other articles on this website.


  1. Best Solar Powered phone charger for camping says:

    […] If you do not have to keep up with a certain budget, you can easily reap the advantages of this model. However, there are a few cons about the device that you need to pay attention to. It is not a model that you can easily carry around. The bulky size and the heavy weight of the model can weigh you down on the hike you have been looking forward to so much. […]

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