You can get MoesHouse Tuya Smart Dual Power Controller 80A Solar Wind System for $229.99 with coupon (from Banggood). Go down and check coupons out. Remember to check price history if it is available. What is best price?
Battery recovery set-points: Default: 12.5V/25V/50V / adjustable, Utility power transfer time to inverter≤16ms, Transfer time: Inverter transfer time to utility power≤10ms, Product Name: Smart bluetooth Dual Power Controller, LCD Display: Battery voltage; Power source: Utility power or battery-inverter., Input Voltage: Auto Selection: AC 100-120V or AC 220-240V, Output Voltage: Auto Selection: AC 100-120V or AC 220-240V, Application: Off grid solar system; Wind generator; Hydro generator, System Voltage: Auto Select: 12V or 24V or 48V, Model: BAT-80A, Product Size: 19*17*7.25cm(7.4”*6.7”*2.8”in), Battery low voltage transfer set-points: Default: 10.5V/21V/42V / adjustable, Rated Power: 8kw (Utility Power 100-120V);16kw (Utility Power 220-240V)
Latest coupon and price update (UTC):
Banggood ($229.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? But wait a sec… Is it a good price? From what I can see this price is higher than average price ($190.22).
Link: Banggood product page
Price: $229.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8OFFCOUPON, TTBLACK5, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BGMARCHSALE, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8
(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 MoesHouse Tuya Smart Dual Power Controller 80A Solar Wind System? There we go.
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)).