Tech Tree Please....

[Ruatha]

I never build resupply depots.
The first thing I research is solar panels. Two Solar panels 3 on a medium sized ship will keep it running indefinetly, sometimes you might have to stop and wait but not often.
Yes it takes some space on the ship but it's worth it. You get more productive facilities (don't need any resupply depots) and you can project force anywhere on the map.