How to Charge Your GoPro Battery with Solar Power [SunJack Review]

GoPro Accessories, GoPro Tips

In this post, you'll learn how to charge your GoPro battery with solar power.

how to charge your GoPro

Note: SunJack sent us a review copy of the 14W Portable Solar Charger at no charge. They did not pay for a review and our comments and opinions remain our own. 

So you want to charge your GoPro battery with solar power? Here's how:

How to Charge Your GoPro with Solar Power

There are 3 ways to use solar power:

  1. Charge directly from the solar panels: The SunJack has two USB outputs – one can charge the included lithium-polymer battery and the other can charge your GoPro. You'll need constant direct sunlight for this to be a good option.
  2. Charge directly from the included 8000mAh battery bank: Use your SunJack battery bank (which charged during the day) to recharge all your device batteries (GoPro, phone, etc) at night. Just plug your charger into the battery bank. I have some aftermarket battery chargers that will charge up to 3 GoPro batteries at once.
  3. Direct connect the SunJack battery bank to your GoPro. This is a great option for night lapse shoots. The included battery is 7 times more powerful (8000mAh compared to 1160mAh) than the standard internal GoPro Hero4 battery. I easily shot an 8-hour nightlapse of the milky way – and the battery still had juice to spare in the morning.

While it sounds okay to charge from the solar panel directly, this isn't the easiest. Likely you'll need your batteries charged as you head out. I recommend charging the battery bank during the day (option #2) and using that to charge your devices at night.

More reading: 11 Best Solar Panels for Camping (Charge Your GoPro and Phone)

sunjack review solar charger

Why Solar Power? 

In addition to being clean, renewable energy, solar power is incredibly convenient.

If you are always near an outlet, you don't need to worry about this. But if you like to hike and camp – you'll need a source of power. I used the SunJack on two recent camping trips and it saved me. I would have had to bring a backpack full of GoPro batteries. Instead, I brought just a few and charged them every night.

external gopro battery solar power

Pictured with the GoPro Hero4 Black, mounted on the Pedco UltraClamp. This setup is shown with option #3 (see above): directly powering the GoPro with the SunJack battery bank. 

SunJack Portable Solar Charger Review

I've been using the 14Watt Portable Solar Charger for a few months. Here's what I think of it so far:

The bottom line: This is my first successful test of a solar-powered product. I've had numerous solar powered flashlights that would take forever to charge – and then quickly lose the charge. I've used this product for the past couple of months and I'm impressed. The unit has performed better than advertised and it has saved me on two recent camping trips. I will definitely continue to use this – and recommend that you pick up one of your own. They offer three different sizes – make sure to check them all out before you order. The 7W model ($49.00) might do all you need.

Product specs: This foldable solar charger folds to the size of an iPad in an Otterbox case. It weights 2.3lbs and measures 6.75″ x 9.25″ 1.75″. The case has eye loops and carabiners for mounting /hanging on trees, backpacks or clotheslines. This model produces 14 Watts of power using 19% mono-crystaline solar cells. (More on the type of solar cells at the end of the post.)

Charging time: I timed the charging time by placing the panels in direct sunlight. I began at noon (11:55am) with one bar. It was fully charged by 3:25 pm. It charged 80% in 3.5hrs. At that rate, it would have fully charged from empty in just over 4 hours. This is even less than the 5hrs that the company advertises.

Battery life: The SunJack 8000mAh battery has five LED lights – each representing 20% of battery life. One evening, I used the fully charged battery to charge 5 GoPro batteries (2 for the Hero3 and 3 for the Hero4), one phone and an iPad. And it still had charge left over. On another night, I shot an 8-hour night lapse (the camera was on all night) and it still have 40% charge in the morning.

Positioning: While the solar panels will continue to collect solar energy with some cloud cover, it will slow it down. Even in direct sunlight, it's best to play with the angle – so the panels can get the most direct sunlight possible.

The Sunjack Solar Charger comes in 3 sizes:

  1. 7 Watt SunJack Solar Charger: This 2 panel solar charger comes with a 4000mAh fast charge battery that will charge in approximately 5 hours.
  2. 14 Watt SunJack Solar Charger: This is the model that I have. It comes with an 8000mAh fast charge battery that will charge in approximately 5 hours.
  3. 20 Watt SunJack Solar Charger: This is their largest solar charger and is slightly larger (10″ x 7.5″) than the 14 Watt model. It comes with 2 x 8000mAh batteries that will both charge in 5 hours.

Unboxing the Sunjack 14W Solar Charger

Watch on YouTube

SunJack 4-Panel Solar Charger Review

Watch on YouTube

how to charge your GoPro solarDifference between Monocrystalline and Polycrystalline Solar Cells

This solar charger is powered by 19% mono-crystaline solar cells. What's the difference between monocrystalline and polycrystalline solar cells? Good question. Here's how I understand it.

  • Monocrystalline silicion (mono-Si) cells are made out of a cylindrical silicon ingot. It is easily recognizable by it's even color and uniform external appearance. This indicates high-purity silicon. Mono-Si solar panels have higher efficiency rate because they are made out of the highest grade silicon. They are also space efficient and last longer than other types. Because of their purity, they also tend to perform better in low-light conditions. Monocrystalline silicion has a 15-20% efficiency rate. 
  • Polycrystalline silicon (p-Si) is the alternative material. The first solar panels created (back in the 1980's) were made with this less expensive and less efficient material. It has an efficiency rate of 13-16%. 

How many watts does a solar panel produce? It depends on four factors:

  1. The sun's intensity
  2. Solar cell efficiency (are your solar cells made with monocrystalline or polycrystalline silicon)
  3. Solar panel size
  4. The amount of sunlight directly hitting the panel

In the case of the 14W SunJack, the combined wattage from four panels is 14 watts. That means that each panel produces 3.5 watts. This changes with the different sizes of solar panel.

portable solar charger

Should you get a SunJack solar charger? If you like to travel (bike, hike, camp or road trip) the answer is probably yes. Just take a few minutes and compare the different sizes of SunJack chargers to make sure you get the right size for your devices. If you are unsure, I think the 14W model should do everything you need – I've been very happy with mine.

And that's how to charge your GoPro battery with solar power.

Your Turn

Have you used solar chargers? How do you charge your GoPro batteries charged while traveling? Please join me in the comments!


Hi, I'm the Author!

Bryan Haines is co-editor of ClickLikeThis: GoPro tutorial blog. He is a travel blogger and content marketer. He is also co-founder of GringosAbroad (Ecuador's largest blog for expats and travelers) and Storyteller Media (content marketing for travel brands). Work with ClickLikeThis.

3 comments… add one
  • kevin clemence Jan 8, 2017, 1:27 am

    ive been running gopro 4 & 5 sessions for about 2 years traveling. I have to use a converter while traveling for the hero4 inside and just the battery storage with the ones mounted outside. ive noticed with continuous power it seems to effect the gopro performance. has anyone else experienced this?

  • Paul Jul 22, 2018, 3:48 pm

    Hi Bryan,
    Thanks for this article. I put my eyes on a voltaic systems arc20w kit, but couldn’t convince myself to spent such an amount of money (it is $265) so searching for alternatives I found your review and this might be what I need.

    I have 2 questions:
    -while charging the powerbank from the panel, can I plug into the powerbank a phone?
    -can it charge a laptop/dslr camera battery?

  • Peter T Hulth, III Aug 20, 2018, 12:13 pm

    Will the Sunjack 14W system power a 9V 6ooo mA portable fan?

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