When I was updating this page the price was $76.79 for 18W 12V Solar Panel System 4000W Power Inverter Controller (in Banggood). Price history, coupons and price alert are available on this page. What is best price?
18W 12V Solar Panel Solar Power System Portable 4000W Power Inverter With 2 USB Ports 30A Solar Charge Controller LED Screen Display – Black 12V to 220V
Latest price update (UTC time):
Banggood ($76.79)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Well, is it a good price anyway? This price is higher than average price ($69.98) for this item.
Link: Banggood product page
Price: $76.79
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGCAPITALOS8, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP
(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
Here is price history (for all/most countries) for 18W 12V Solar Panel System 4000W Power Inverter Controller.
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)).