The intent is likely that solar panelling is meant to be a minor and auxiliary form of energy production.
Unless it's been errataed over the summer, the wording/rules is vague enough to game the system to massively produce energy, which while not being able to directly power the ship, can be transformed to alternate current by funneling it through the batteries first.
Since presumably they are stalked on arrays that like sunflowers always face the sun, acceleration over one gravity will likely tear them off the main hull.