$21.69 – 13W Portable Solar Panel Kit 5V (Banggood, Aliexpress: Working voltage: 5V, Product net weight: about 155G/160G/265G, Material: Class A polycrystalline silicon solar panel, Output: Dual USB, Power: 6W/10W.60W (the best price with coupon)).
When I was updating this page, then coupon price was $21.69 for 13W Portable Solar Panel Kit 5V (in Banggood). Check coupons or create price alert down below. What is best price?
Latest price update (UTC time):
Banggood ($21.69)
Banggood warehouse is located in China. I have no active coupons for you right now. Is it a reasonable price for this item? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $20.63)
Link: Banggood product page
Price: $21.69
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG589b2e, BGd2f208, BGET12, BGET10
(these codes were not working in latest coupon update, but you can check them out anyway)
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
Do you need price history chart (for all/most countries) for 13W Portable Solar Panel Kit 5V? There we go. The lowest price was: $19.52.
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)).