Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Can it be charge with a solar panel
Document: Next test is how long it takes a solar panel to charge it?! ?
I got this to accompany my Anker 14W Dual-Port Portable Foldable Outdoor Solar Charger. The plan was to use this for charging our phones at night and use the solar panel for charging during the day. We were using our phones constantly for GPS navigation up the ICW so we were eating up the battery life on our phones. After 3 days and 6 phone charges from as low as 10% battery life, this thing still has 50% of its juice left.
I got this unit thinking that it would be compatible with solar charging, but it is not. That is the reason I am giving it four stars instead of five.
Not that I was complaining! Now that I combined the power bank with a solar charger, I will be sure to have plenty of power for my extended camping trip. Highly recommended!
I considered using solar, but decided that for IPOD, IPHONE5, and Kindle 3G, this device was a more appropriate way of charging my devices. In the past I used AA Li-Ion batteries plus DC-DC converters. This required a lot of batteries and was somewhat expensive. Still overall weight vs power for overall week of usage was about the same.
I've never been disappointed with Anker products and will remain a loyal customer forever. I have my eye on the 14w portable solar charger. I've never used solar chargers and can't wait to try it. With all the choices out there I'll stick to Anker. Anker products and service has always been great. Thanks for giving me the opportunity to tell others and thanks for your great products.
this was great, just as advertised. I bought it for a 4 day trek when I realized how much more expensive a good solar charger was. This worked great and charged my iphone 5s eight or nine times and we had music during meals. highly recommend it for anyone that needs to keep a phone/ipad charged for 3-5 days. now i carry it on all business trips so i don't have to worry about keeping charged.
Excellent very happy with it. Will recommend it !!! Charge devices very fast. It is as advertised  Try it out
Can't give it a 5 star rating but it will charge your device nicely.
tis charger can charge both my iphone and gs4 at the same time. saved me a lot of time. good
Answer: That is a great question.   The short answer is yes, if you have the right solar panel.  The device is furnished with a 12 volt 2 amp switching power supply.   According to the product description on Amazon, "[the] Included 100-240V AC adapter recharges the battery in just 4-5 hours."   In order to match that charging time, your solar panel would need to provide 12 volts at 2 amps.    I wouldn't recommend that you go much above 12 volts, but you should be OK with a nominal 13.6 auto battery charging source.     I don't know if there is a boost regulator in the Anker box or not, so I don't know the minimum voltage that will actually charge the device.  But if you can get close to 12 volts, your charging time should be proportional to the current your solar charger can supply.   My US$ 0.02.John