Consider the following example:
If your current spaceship has:
- An energy storage capacity of 20,000 units
- And it currently has 20,000 units of energy stored inside (full capacity)
If you wish to swap it to a ship that has:
- An energy storage capacity of 10,000 units
- The energy stored in your current spaceship will exceed the new storage capacity by 10,000 units
- When you swap to the new spaceship, only 10,000 units of the original ship's energy will be transfered. The rest will be lost.