High Efficiency Solar Charger

Bright Power

Electronic devices are supposed to make us more mobile, but instead often tie us to a power outlet. Thanks to SunJack, that’s no longer an issue.

This durable, high-efficiency solar device charger powers phones and tablets at wall-socket speed. Everything you need is included: a foldable solar panel with 2A USB ports, an
ultra-slim lithium-polymer battery, a fast-charge battery cable, and carabiners that let SunJack hang in a variety of ways.

Founder Harold Tan has spent years in the solar industry, and set out to design a robust, portable solar power source. SunJack folds to about the size of an iPad and can fully charge most phones in 90 minutes—twice the speed of standard solar chargers. It holds enough energy for up to eight smartphones after just five hours in the sun.

SunJack is a greener way to power up, and to be less reliant on the grid. It’s also a useful tool for emergency preparedness. This handy charger provides portable energy independence for anyone, anywhere.
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SunJack - High Efficiency Solar Charger

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Grommet Launch Conversation

  • Harold

    Hi, I'm Harold, founder of SunJack - your ultimate power companion. I'd love to answer any questions you have!

  • Judy
    3/3/2015 12:31 PM

    Can it power a computer too?

  • Mike
    Mike – Grommet Team
    3/3/2015 12:53 PM

    Hi Judy, thanks for the question. Unfortunately it cannot power a computer. The SunJack is compatible with USB-powered devices only.

  • Kim
    3/3/2015 12:32 PM

    Does this work for "dumb phones"? My husband and I have flip phones, only 1 charger.

  • Mike
    Mike – Grommet Team
    3/3/2015 12:52 PM

    Hi Kim, if you're using a USB-compatible charger for your phone then it absolutely can, yes.

  • S
    3/3/2015 12:33 PM

    Hi Harold, great idea! The video would indicate that the device will charge in a sunny window (car, house, etc). Does that affect the charge time of five hours? Where do you manufacture the SunJack? What is SunJack's warranty? Thanks!

  • Mike
    Mike – Grommet Team
    3/3/2015 1:06 PM

    Hi S, as long as the SunJack is in sunlight, it shouldn't affect the charge time too drastically. The SunJack is manufactured in China. I'll let Harold provide info on the warranty, but I know it has great durability. Part of its test was being run over by a car just to give you a point of reference.

  • Harold
    Harold – Special Guest
    3/3/2015 1:14 PM

    @S if the SunJack is behind glass, it actually will slow down the charge since windows block UVB (Ultraviolet B) rays. However we've found that one day of direct sun, even through a window, will still provide a full charge. It may just take longer than 5 hours, depending on the thickness and type of glass.

    We provide a full one year hassle free warranty, and also have a battery replacement program - where you can trade your battery for just $20.

    The SunJack is extremely durable - we've dropped in on concrete, jumped on it, driven over it with a car, and shot it with a handgun! (You can find these videos on YouTube)

  • Sophia
    3/3/2015 1:34 PM

    Is the SunJack water resistant at all? Sometimes when you're outdoors it starts to rain unexpectedly. So for $160 + tax & shipping it'd be nice to know it's not going to get ruined easily.

  • Harold
    Harold – Special Guest
    3/3/2015 1:37 PM

    @Sophia Yes! SunJack is very weather resistant and we've left it out in heavy rain before with no problems. Just don't submerge it inside water or drop it in your pool ;)

  • Mike
    Mike – Grommet Team
    3/3/2015 1:43 PM

    Hi Sophia, and as an added bonus, there is free shipping on the SunJack like all other orders of $50 or more!

  • stacy
    3/3/2015 1:50 PM

    Any problems going through airport security with SunJack in a carry-on bag?

  • Harold
    Harold – Special Guest
    3/3/2015 1:56 PM

    @Stacy Our team and customers have been through many security checkpoints. While we get interested looks and comments, we have never been blocked. TSA regulations allow you to bring an Lithium Ion or Lithium Polymer battery (like our battery or your cell phone) with you as part of your carry-on luggage.

    We use the same type of battery as typical cell phones, so there is nothing hazardous or dangerous about our unit (assuming it is in decent working condition and isn't cracked, damaged, etc).

  • Steve
    3/3/2015 2:14 PM

    Can you provide more specs? Wattage, output amperage, overall dimensions and weight?


  • Harold
    Harold – Special Guest
    3/3/2015 2:16 PM


    Solar panels: 14 watts of high efficiency mono-crystalline

    Max output voltage/current: Two 5V/2A USB ports

    Battery: 8,000mAh lithium-polymer battery

    Size folded: 6.75” x 9.25” x 1.75” (17.15cm x 23.50cm x 4.5cm)

    Size unfolded: 30.75” x 9.25” x 1.75” (78.11cm x 23.50cm x 4.5cm)

    Weight: 2lbs (907.19 grams)

  • Heather
    3/3/2015 2:43 PM

    Will it work inside where I have a large sunny window?

  • Harold
    Harold – Special Guest
    3/3/2015 2:55 PM

    @Heather Yes it will! If the window is thick glass, or has anti-UV properties, it may take a little longer to charge, but it will still fully charge in one day of full sun.

  • Harold
    Harold – Special Guest
    3/3/2015 2:55 PM

    @Heather That is, SunJack will fully charge it's internal battery within one day. If you plug your device directly into the solar panel it'll charge just like a regular wall outlet.

  • Harold
    Harold – Special Guest
    3/3/2015 2:57 PM

    I'd like to highlight that SunJack's slim internal battery pack can hold enough juice for 4 smartphone charges, and you can detach it and take it with you to charge anywhere, anytime. Not only can you untether from the wall outlet, but you can also untether from our solar panel!

  • Carol
    3/3/2015 3:12 PM

    @Harold How long will the battery hold its charge? I may not find myself needing to use it for a while. Also, we live in San Francisco where it is often foggy. How bright does the sun have to be to get a good charge?

  • Harold
    Harold – Special Guest
    3/3/2015 3:21 PM

    @Carol the battery will hold it's charge for 3 months, then slowly start to lose it's charge over subsequent months.

    A clear, direct ray of sun is the best for optimal charging. It will still charge under foggy conditions, but will be slower.

  • Zima
    3/3/2015 4:10 PM

    @Harold that's is one helpful unit for us, here in Florida! It's a good tool for our hurricane package. Thank you, for all your hard work and great product!

  • Harold
    Harold – Special Guest
    3/3/2015 6:19 PM

    @Zima Thanks Zima! It is a key essential in emergency and disaster prep kits. Here in California we pack it in our earthquake go bags :)

  • Ann
    3/4/2015 9:48 AM

    you said it will charge tablet & dumb phones, not computers; what about laptops?

  • Mike
    Mike – Grommet Team
    3/4/2015 10:18 AM

    Hi Ann, unfortunately not. Like desktop computers, laptops cannot be charged through a USB port.

The launch day conversation has ended. Please direct further questions about this Grommet to our Community Experience Team.