How do solar panels contribute to spacecraft power budgets?

How do solar panels contribute to spacecraft power budgets?

• A. They store energy for eclipse periods.
• B. They increase launch mass.
• C. They generate electrical power from sunlight to meet loads and recharge batteries for eclipse periods.
• D. They provide thermal protection.

Answer: (C)

Solar panels are the primary source of electrical power for many spacecraft. They convert sunlight into electricity that runs onboard loads and also charges the spacecraft’s batteries so energy is available during periods of darkness or eclipse. In a power budget, the goal is to have enough generated power to meet requirements while keeping the batteries charged for times when solar input isn’t available. The amount of power they can produce depends on sun exposure, panel area and efficiency, orientation, and age-related degradation, while batteries provide the energy during eclipse. The other ideas don’t fit because energy storage is done by batteries, not the panels themselves, and panels aren’t meant for thermal protection or primarily to affect launch mass.

Solar panels are the primary source of electrical power for many spacecraft. They convert sunlight into electricity that runs onboard loads and also charges the spacecraft’s batteries so energy is available during periods of darkness or eclipse. In a power budget, the goal is to have enough generated power to meet requirements while keeping the batteries charged for times when solar input isn’t available. The amount of power they can produce depends on sun exposure, panel area and efficiency, orientation, and age-related degradation, while batteries provide the energy during eclipse. The other ideas don’t fit because energy storage is done by batteries, not the panels themselves, and panels aren’t meant for thermal protection or primarily to affect launch mass.