How many solar panels do I need to get 12kw in winter in the Pacific Northwest?

Answer: per this solar axis[0], we average 242Wh/m² in January. Assuming 25% solar panel efficiency, this gives 60.5W/m². To get 12kw would require 200m² of solar panels, or 45"x45". If we covered our entire house with solar panels it'd be 80m²=4.8kW.

0. https://globalsolaratlas.info/detail?c=47.503287,-122.313538...