Shield power measures the damage that a unit can withstand each round until the Hull Plating is damaged.
Every unit has a shield: an electromagnetic "cover" that absorbs part of the inflicting damage. Every time a unit gets shot, the damage is partially or completely (depending on shield strength) absorbed by the unit's shield, thus protecting the Hull Plating. The relevance of the shield is that it is restored at the end of each round.
For a unit with Basic Shield Strength (SBase, see table bellow for values), and shield technology level STech, its shield power (SPow) on each round is
Special Cases
If the firing ship's attack power has less than 1% of the defending ship's shield power, the shot is deflected by the shields.
Example: A Light Fighter has 50 Attack Power, while a Death Star has 50,000 Shield Power. Thus the Light Fighter's attack power is 0.1% of the Death Star's shield power, and therefore the Light Fighter's shots at the Death Star will be deflected.
This is known as the Bouncing Effect.
Basic Shield Strength of units
| Ship | Basic Shield Strength |
| Death Star | 50,000 |
| Destroyer | 500 |
| Bomber | 500 |
| Battle Ship | 200 |
| Battlecruiser | 400 |
| Cruiser | 50 |
| Heavy Fighter | 25 |
| Light Fighter | 10 |
| Colony Ship | 100 |
| Large Cargo Ship | 25 |
| Small Cargo Ship | 10 |
| Recycler | 10 |
| Solar Satellite | 1 |
| Espionage Probe | 0.01 |
| Defense | Basic Shield Strength |
| Plasma Turret | 300 |
| Gauss Cannon | 200 |
| Heavy Laser | 100 |
| Ion Cannon | 500 |
| Light Laser | 25 |
| Rocket Launcher | 20 |
| Small Shield Dome | 2,000 |
| Large Shield Dome | 10,000 |