The solar reactor seems really useful at maximum power 10 when the CC is halted and you plan on doing some operations with shuttles, fighters, and away parties (no need in wasting Radine). However, I have found that without the nuclear reactor online, the Tac Ops computer is not available while the integrated tactical display shows "malfunction" on all views regardless of how much solar power the CC is positioned to receive.
For example, I am halted with the nuclear reactor off and relying solely on solar power. Engines, cloaking device, tractor beam, and cloning module are offline as well. I have 21 available power units, yet TacOps and ITD still do not work. SC - is this intentional?