$86.44 – Peak power 4000W, USB output DC 5V/2.1A, Output voltage AC 220V, Model UNNC-4000, Output waveform modified sine wave, Color Black, Input voltage DC12V, Clip length 60 cm / 1.96 ft, Continuous Output 2000W.
Right now the best price with coupon code for 4000W Peak Car Power Inverter DC 12V To AC 220V is $86.44 (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest coupon and price update (UTC):
Banggood ($86.44)
Banggood warehouse is located in China. Isn’t it too expensive? Hmmm, price is higher than average (which is $82.94 right now), so better set price alert down below… I found coupon for you. Check this out.
Link: Banggood product page
Price without coupon: $86.99
1. ($86.44): BGCARCE1
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG3d79d8, BGCarEle4, BGSCM11, BGCarEle5, BG845979, BGLMQ15, BGCAR639, BGNEWYEAR8, BGAMMT03, BG124578
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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 4000W Peak Car Power Inverter DC 12V To AC 220V. The lowest price was: $81.89.
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)).