$27.89 – 5V 15W USB Solar Panel (Banggood, Aliexpress: Process Laminated Sanding Board, Packaging Box Specifications 200*140*40mm, Current 0-2.4A, Conversion Rate 19%, Folding Size 170 * 120 * 30mm, Weight 400g（With Packaging Box）, Product Name 15W Solar Foldable Panel, Waterproof Grade IPX6, Output Voltage 5V, Unfolded Size 790 * 165mm, Output Interface Dual USB, Chip A-grade Polycrystalline Silicon (the best price with coupon)).
What is the best price for 5V 15W USB Solar Panel? I think it is $27.89 (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($27.89)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Price? Well, this price is higher than average price ($26.07)
Link: Banggood product page
Price: $27.89
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 5V 15W USB Solar Panel. The lowest price was: $23.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).