Spaceships: Engineering, Sunbathing and It's Not Easy Being Green
If the panels are fitted to a ship without a power plant, then assume the (non–existent) power plant is sized to the ship’s basic systems and a Thrust one manoeuvre drive.
If the panels are fitted to a ship without a power plant, then assume the (non–existent) main power plant is sized to deliver a performance rating of one.
Can you spot the difference?
The top sentence comes from the revised edition, and for our purposes, that for every ten tonnes, you have an appropriate rated solar panel that will deliver three scotts, in lieu of an a shipboard generator).
Though, which generator?
Let's go with my favourite technological level, nine, since that's when you introduce manoeuvre drive technology.
Let's take an early fusion power plant, with a default setting of ten scotts per tonne output.
Let's see how all this fits on a thousand tonne hull (mostly to get over the half tonne panelling minimum).
So a one kay hull has a basic power requirement of two hundred scotts, and can needs another hundred scotts to input into the impulse drives.
That means I need thirty tonnes of early fusion power plant to generate three hundred scotts.
Solar panelling is sized to ten percent of the matching power plant, that would mean that I only need three tonnes of solar panelling to generate three hundred scotts at technological level eight.
If we assume that actually any solar panelling can only deliver three quarters of the advertised output, we have four tonnes of technological level eight solar panelling delivering a net output of three hundred scotts, which works out to seventy five scotts per tonne of solar panelling, which is just seventy percent as efficient per tonne as a technological level twenty anti matter power plant; and greener.