Distiller is a big droid, designed for interplanetary flights. It carries special equipment for mining resources at the asteroids. Its autonomous energy sources can be used to power defensive structures, reducing their load on main psi network.

Send the unit to your colonized asteroids and it will produce the resources per the following formulas:
12 + (maximum temperature) / 30
6 - (minimum temperature) / 40
with a maximum number of distillers 25 * (basic number of fields) raised to the power of 0.85 for the asteroids with over 15 fields and a maximum of 250 for others.

Reduces energy expenses for defensive structures by (1 + amount/4500) times for toss objects.
Unit maintenance costs are not taken into account by amortization.