Thumb Score: +42 Renogy Solar Store via AliExpress has 400W Renogy 12V Solar Kit w/ 4x 100W Panels & 30A PWM Controller on sale for $286.38 – $50 when you apply promo code USDEAL50 or USAFF50 or BYE50F (or $40 off w/ USD1140) at checkout = $236.38 (or less; see note below). Shipping is free.