# Quick numbers (to anchor intuition) - **Sunlight:** \~50 W/m² at Jupiter; \~15 W/m² at Saturn (top of atmosphere). With 30% cells → **\~15 W/m² (Jupiter)**, **\~4.5 W/m² (Saturn)** delivered. One **1 MW** solar plant needs **\~66k m²** at Ganymede vs **\~221k m²** at Enceladus/Titan (and more on Titan’s surface due to haze). - **Titan wind (rule-of-thumb):** At 2 m/s, practical capture \~**7 W/m²** of rotor sweep; at 5 m/s, **\~100+ W/m²**—a solid complement to fission.