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    Frequently Asked Questions

    What are the ideal conditions for solar charging?

    The optimal time to use your RuK Pack solar power is 10:00am - 2:00pm, where the illuminance is about 800~900 X100LUX. The solar panel will still function at other times of the day, but during these times are considered the best for performance.   

    How long does it take for the solar panel to charge my phone?

    In ideal sun condition and temperature, the solar panel will provide 1% charge increase every 2-3 minutes. Under ideal conditions, the solar charge can power on a 0% smartphone in 10-13 minutes (note: at least 3% power is required to turn on most iPhones). Most Smart phones can be fully charged with your RuK Pack solar power in 7-9 hours’, if starting from 0%

    How well does the RuK Power Bank charge?

    The RuK Power bank will provide ~ 30% increase in typical smartphone charge over 60 minutes under typical conditions. 

    Is the RuK Pack waterproof?

    Water resistant, but not “submerge under water” waterproof. The high-grade polyester resists water, and the zippers are weather sealed. 

    How large is the meal compartment and does it keep items warm/cool?

    The Meal Compartment measures 5" x 13" x 5.5" (12.7x33x14cm). Yes, the compartment is sealed and insulated, which prolongs desired temperatures. Icepack's will stay preserved like most basic cooler bags.

    Can I use my own power bank/battery pack?

    Yes, RuK Packs are specifically engineered to connect with most battery packs requiring USB power to charge. The side pocket offers easy storage and access for portable phone charging battery packs.

    Does the solar power work indoors or on cloudy days?

    Wherever there is UV light, the solar panel will work. The level of direct sunlight will impact the level of power it produces. Your RuK Power Bank should be used to charge indoors, at night, or on very cloudy days.

    What can the RuK Pack charge?

    Most USB devices will charge from RuK’s Solar power: smartphones, battery packs, headphones, smartwatches, etc.

    What size laptop can the RuK Pack hold?

    The laptop pocket is larger than most standard bags. Microfiber laptop sleeve measures 19" x 13" (48x33cm.)

    What are the dimensions of the RuK Pack?

    The Solar backpack measures 19.3" x 13.6" x 8.3" (49x34.5x21cm) with a 40L+ capacity.

    Are RuK Packs TSA approved backpacks?

    Yes, RuK Packs meet all TSA requirements for carry-on luggage and has been through TSA scanners thousands of times without issue.  

    Does the RuK Pack Hold its shape when empty?

    Yes, the RuK Pack has a stand-alone design that allows it to maintain its general shape (even when empty), but remain flexible enough to ensure easy storage.

    What is your warranty?

    Our warranty for backpacks guarantees our product will be free from defects in materials and workmanship for the life of the product or 5 years (1 year for electronic components). We reserve the right to decide whether a product is defective or damaged through normal wear-and-tear. Please refer to the warranty section of our website for more information.

    What is the return policy?

    You can return your RuK Pack 30 days after it is received for any reason with proof of purchase, packaging and hang tags intact, no cosmetic or functional damage, and all items included. A $30 USD re-stocking fee per RuK bag will apply and be deducted from refund. Customer is responsible for all shipping arrangements and costs.

    How do I use the Solar Power?

    Please refer to our online guide here.