

Note that, as of version 1.0, the unshielded OX-4 series solar panels can't be retracted once deployed, so they are not suited for aerobraking missions.

The energy output of solar panels depends on their orientation to Kerbol. Except for the surface-mounted OX-STAT Photovoltaic Panels (and its larger brother OX-STAT-XL Photovoltaic Panels, all panels will automatically pivot around one axis to face the sun as much as possible. Generated power will also decrease with increasing distance from Kerbol, following the real-life inverse-square law: Reorienting a vessel to manually aim the panels at the sun and eliminate shadows cast on them will also improve power generation.
#KSP BEST TIME TO DECELERATE GENERATOR#
The PB-NUK Radioisotope Thermoelectric Generator is a constant and reliable source of energy that doesn't require any sunlight and is much more resistant to atmospheric drag than solar arrays.

Unfortunately, it has a very impractical shape and is significantly heavier than solar panels with a comparable output of electricity. The fuel cell, like the Fuel Cell and Fuel Cell Array, converts liquid fuel and oxidizer directly into electric charge, similarly to generators. As now the electricity production is the only purpose: they consume 0.0025 units of fuel for each electric charge unit (0,0025 /⚡), means they produce 400 units of electricity from a single unit of fuel.
