Click below for 40% Off discount code. Valid for all existing WF customer until May 31, 2019. The discount code ( SOLAR40OFF ) is applied at the checkout step when buying from shop.weatherflow.com. This link should have the code embedded and take you directly to the Solar Power accessory page:
https://shop.weatherflow.com/discount/SOLAR40OFF?redirect=%2Fproducts%2Fsolar-power-accessory