Right now the best price with coupon code for 40W 12V Solar Panel Kit 100A is $35.94 (in Banggood). Get coupons, create price alert or check price history out! Best price?
2x Solar Panel, 1x Manual, 1x 10-IN-1 Charging Line, 4x Carabiner, 1x Cable, 1x 2-IN-1 Cable, 1x 60A/100A Solar Controller(optional), 1x Alligator Clip, 8x Suction Cup, 1x Car Charger
Latest coupon and price update (UTC):
Banggood ($35.94)
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update. Well, is it a good price anyway? From what I can see this price is higher than average price ($33.51).
Link: Banggood product page
Price: $35.94
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BG8f6134, Cuponation9, BG51943, BG8ReviTrage, BGcoupon8off, BGGutscheine, BG00c906, BG8OFFCOUPON, BG2d0ecd, BG6f4654, TTBLACK5, BGc5d4b1, BG589b2e, BGET10, BG8FORMULAMX, BGe245a9
(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
Price history (for all/most countries) for 40W 12V Solar Panel Kit 100A is here.
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)).