diff --git a/galaxy/star_systems/barnard's_star.tscn b/galaxy/star_systems/barnard's_star.tscn
index 39297e13..4c1650b5 100644
--- a/galaxy/star_systems/barnard's_star.tscn
+++ b/galaxy/star_systems/barnard's_star.tscn
@@ -35,14 +35,15 @@ texture = ExtResource("2_xr5lq")
 [node name="Frigate" parent="." instance=ExtResource("3_snupf")]
 transform = Transform3D(0.866897, -1.28496e-16, 0.498488, 3.48787e-16, 1, -3.48787e-16, -0.498488, 4.76228e-16, 0.866897, -8.39, 2.08165e-12, 1.15)
 script = ExtResource("4_cyjdf")
-detection_range = 10.0
-preferred_distance = 3.0
-distance_hysteresis = 1.5
-fire_range = 6.0
-direction_tolerance_deg = 10.0
-patrol_radius = 10.0
-patrol_target_tolerance = 1.0
+detection_range = null
+preferred_distance = null
+distance_hysteresis = null
+fire_range = null
+direction_tolerance_deg = null
+patrol_radius = null
+patrol_target_tolerance = null
 ship_def = ExtResource("5_shiqq")
+free_when_destroyed = null
 
 [node name="CollisionShape3D" parent="Frigate" index="0"]
 transform = Transform3D(-4.63277e-08, 3.48787e-16, 1, 3.48787e-16, 1, -3.48787e-16, -1, 3.48787e-16, -1.07655e-07, 0.00127268, -0.00946045, 0.308623)
diff --git a/galaxy/star_systems/wolf_359.tscn b/galaxy/star_systems/wolf_359.tscn
index 501a77ee..f12e8e59 100644
--- a/galaxy/star_systems/wolf_359.tscn
+++ b/galaxy/star_systems/wolf_359.tscn
@@ -35,14 +35,15 @@ texture = ExtResource("2_sinon")
 [node name="Frigate" parent="." instance=ExtResource("3_myr2k")]
 transform = Transform3D(-0.155866, 3.98888e-16, 0.987779, 3.48787e-16, 1, -3.48787e-16, -0.987779, 2.9016e-16, -0.155866, 5.29319, 2.08165e-12, -2.13469)
 script = ExtResource("4_j6bxn")
-detection_range = 10.0
-preferred_distance = 3.0
-distance_hysteresis = 1.5
-fire_range = 6.0
-direction_tolerance_deg = 10.0
-patrol_radius = 10.0
-patrol_target_tolerance = 1.0
+detection_range = null
+preferred_distance = null
+distance_hysteresis = null
+fire_range = null
+direction_tolerance_deg = null
+patrol_radius = null
+patrol_target_tolerance = null
 ship_def = ExtResource("5_gryh4")
+free_when_destroyed = null
 
 [node name="CollisionShape3D" parent="Frigate" index="0"]
 transform = Transform3D(-4.63277e-08, 3.48787e-16, 1, 3.48787e-16, 1, -3.48787e-16, -1, 3.48787e-16, -1.07655e-07, 0.00127268, -0.00946045, 0.308623)
@@ -58,14 +59,15 @@ mesh = SubResource("QuadMesh_fxdwr")
 [node name="Frigate2" parent="." instance=ExtResource("3_myr2k")]
 transform = Transform3D(-0.445682, -1.56783e-16, -0.895191, 3.48787e-16, 1, -3.48787e-16, 0.895191, -4.67679e-16, -0.445682, -6.43007, 2.08165e-12, -4.51201)
 script = ExtResource("4_j6bxn")
-detection_range = 10.0
-preferred_distance = 3.0
-distance_hysteresis = 1.5
-fire_range = 6.0
-direction_tolerance_deg = 10.0
-patrol_radius = 10.0
-patrol_target_tolerance = 1.0
+detection_range = null
+preferred_distance = null
+distance_hysteresis = null
+fire_range = null
+direction_tolerance_deg = null
+patrol_radius = null
+patrol_target_tolerance = null
 ship_def = ExtResource("5_gryh4")
+free_when_destroyed = null
 
 [node name="CollisionShape3D" parent="Frigate2" index="0"]
 transform = Transform3D(-4.63277e-08, 3.48787e-16, 1, 3.48787e-16, 1, -3.48787e-16, -1, 3.48787e-16, -1.07655e-07, 0.00127268, -0.00946045, 0.308623)
diff --git a/game.tscn b/game.tscn
index 90b200d5..012fd79e 100644
--- a/game.tscn
+++ b/game.tscn
@@ -1,4 +1,4 @@
-[gd_scene load_steps=37 format=3 uid="uid://sunhu71swcs2"]
+[gd_scene load_steps=38 format=3 uid="uid://sunhu71swcs2"]
 
 [ext_resource type="Script" path="res://utils/shader_precompiler.gd" id="1_kgmvv"]
 [ext_resource type="Script" path="res://galaxy/hyperspace_controller.gd" id="2_5gj7y"]
@@ -26,6 +26,7 @@
 [ext_resource type="Script" path="res://gui/target_info.gd" id="20_4ebat"]
 [ext_resource type="Script" path="res://gui/game_over.gd" id="22_g1tis"]
 [ext_resource type="Script" path="res://gui/fps_counter.gd" id="23_ncnr7"]
+[ext_resource type="Texture2D" uid="uid://dif27wf74itjw" path="res://gui/nesia_assets/elements/IconEnergy.png" id="24_iwm5p"]
 
 [sub_resource type="World3D" id="World3D_pvg5q"]
 environment = ExtResource("6_srnxb")
@@ -241,12 +242,13 @@ pick_sound = NodePath("PickSound")
 stream = ExtResource("16_q8d2x")
 volume_db = -10.0
 
-[node name="PlayerVitals" type="GridContainer" parent="HUD/Sidebar" node_paths=PackedStringArray("hull_bar", "shield_bar")]
+[node name="PlayerVitals" type="GridContainer" parent="HUD/Sidebar" node_paths=PackedStringArray("hull_bar", "shield_bar", "energy_bar")]
 layout_mode = 2
 columns = 2
 script = ExtResource("17_kyl4x")
 hull_bar = NodePath("HullBar")
 shield_bar = NodePath("ShieldBar")
+energy_bar = NodePath("EnergyBar")
 
 [node name="HullIcon" type="TextureRect" parent="HUD/Sidebar/PlayerVitals"]
 layout_mode = 2
@@ -279,13 +281,29 @@ mouse_filter = 2
 theme = ExtResource("11_x7io4")
 step = 2.08165e-12
 
-[node name="TargetInfo" type="VBoxContainer" parent="HUD/Sidebar" node_paths=PackedStringArray("target_label", "vitals_container", "hull_bar", "shield_bar", "pick_sound")]
+[node name="EnergyIcon" type="TextureRect" parent="HUD/Sidebar/PlayerVitals"]
+layout_mode = 2
+tooltip_text = "Shield"
+theme = ExtResource("11_x7io4")
+texture = ExtResource("24_iwm5p")
+expand_mode = 2
+stretch_mode = 4
+
+[node name="EnergyBar" type="ProgressBar" parent="HUD/Sidebar/PlayerVitals"]
+layout_mode = 2
+size_flags_horizontal = 3
+mouse_filter = 2
+theme = ExtResource("11_x7io4")
+step = 2.08165e-12
+
+[node name="TargetInfo" type="VBoxContainer" parent="HUD/Sidebar" node_paths=PackedStringArray("target_label", "vitals_container", "hull_bar", "shield_bar", "energy_bar", "pick_sound")]
 layout_mode = 2
 script = ExtResource("20_4ebat")
 target_label = NodePath("TargetedShipName")
 vitals_container = NodePath("TargetVitals")
 hull_bar = NodePath("TargetVitals/HullBar")
 shield_bar = NodePath("TargetVitals/ShieldBar")
+energy_bar = NodePath("TargetVitals/EnergyBar")
 pick_sound = NodePath("PickSound")
 
 [node name="PickSound" type="AudioStreamPlayer" parent="HUD/Sidebar/TargetInfo"]
@@ -336,6 +354,21 @@ mouse_filter = 2
 theme = ExtResource("11_x7io4")
 step = 2.08165e-12
 
+[node name="EnergyIcon" type="TextureRect" parent="HUD/Sidebar/TargetInfo/TargetVitals"]
+layout_mode = 2
+tooltip_text = "Shield"
+theme = ExtResource("11_x7io4")
+texture = ExtResource("24_iwm5p")
+expand_mode = 2
+stretch_mode = 4
+
+[node name="EnergyBar" type="ProgressBar" parent="HUD/Sidebar/TargetInfo/TargetVitals"]
+layout_mode = 2
+size_flags_horizontal = 3
+mouse_filter = 2
+theme = ExtResource("11_x7io4")
+step = 2.08165e-12
+
 [node name="GameOverDialog" type="AcceptDialog" parent="HUD"]
 title = "Game Over"
 initial_position = 2
@@ -365,6 +398,7 @@ script = ExtResource("23_ncnr7")
 [connection signal="jump_destination_loaded" from="HyperspaceController" to="HUD/Sidebar/SystemName" method="_on_jump_destination_loaded"]
 [connection signal="jump_started" from="HyperspaceController" to="MainCamera/HyperspaceEffect" method="_on_jump_started"]
 [connection signal="ship_destroyed" from="Player" to="HUD/GameOverDialog" method="_on_player_ship_destroyed"]
+[connection signal="ship_energy_changed" from="Player" to="HUD/Sidebar/PlayerVitals" method="_on_player_ship_energy_changed"]
 [connection signal="ship_hull_changed" from="Player" to="HUD/Sidebar/PlayerVitals" method="_on_player_ship_hull_changed"]
 [connection signal="ship_shield_changed" from="Player" to="HUD/Sidebar/PlayerVitals" method="_on_player_ship_shield_changed"]
 [connection signal="ship_target_changed" from="Player" to="HUD/Sidebar/TargetInfo" method="_on_player_ship_target_changed"]
diff --git a/gui/nesia_assets/elements/IconEnergy.png b/gui/nesia_assets/elements/IconEnergy.png
new file mode 100755
index 00000000..7ac97f65
Binary files /dev/null and b/gui/nesia_assets/elements/IconEnergy.png differ
diff --git a/gui/nesia_assets/elements/IconEnergy.png.import b/gui/nesia_assets/elements/IconEnergy.png.import
new file mode 100644
index 00000000..772bdc7b
--- /dev/null
+++ b/gui/nesia_assets/elements/IconEnergy.png.import
@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="CompressedTexture2D"
+uid="uid://dif27wf74itjw"
+path="res://.godot/imported/IconEnergy.png-7d28592ea902d59f0c28cebbb0d83015.ctex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://gui/nesia_assets/elements/IconEnergy.png"
+dest_files=["res://.godot/imported/IconEnergy.png-7d28592ea902d59f0c28cebbb0d83015.ctex"]
+
+[params]
+
+compress/mode=0
+compress/high_quality=false
+compress/lossy_quality=0.7
+compress/hdr_compression=1
+compress/normal_map=0
+compress/channel_pack=0
+mipmaps/generate=false
+mipmaps/limit=-1
+roughness/mode=1
+roughness/src_normal=""
+process/fix_alpha_border=false
+process/premult_alpha=false
+process/normal_map_invert_y=false
+process/hdr_as_srgb=false
+process/hdr_clamp_exposure=false
+process/size_limit=0
+detect_3d/compress_to=0
diff --git a/gui/player_vitals.gd b/gui/player_vitals.gd
index ee2898c9..37537ca3 100644
--- a/gui/player_vitals.gd
+++ b/gui/player_vitals.gd
@@ -2,6 +2,7 @@ extends GridContainer
 
 @export var hull_bar: ProgressBar
 @export var shield_bar: ProgressBar
+@export var energy_bar: ProgressBar
 
 func _on_player_ship_hull_changed(ship: Ship) -> void:
     assert(ship.ship_def.hull > 0.0, "Ship definition should not have 0 hull")
@@ -11,3 +12,7 @@ func _on_player_ship_hull_changed(ship: Ship) -> void:
 func _on_player_ship_shield_changed(ship: Ship) -> void:
     self.shield_bar.max_value = 1.0 if is_zero_approx(ship.ship_def.shield) else ship.ship_def.shield
     self.shield_bar.value = ship.shield
+
+func _on_player_ship_energy_changed(ship: Ship) -> void:
+    self.energy_bar.max_value = 1.0 if is_zero_approx(ship.ship_def.energy) else ship.ship_def.energy
+    self.energy_bar.value = ship.energy
diff --git a/gui/target_info.gd b/gui/target_info.gd
index 3d04c478..5f0cd3de 100644
--- a/gui/target_info.gd
+++ b/gui/target_info.gd
@@ -6,6 +6,7 @@ extends VBoxContainer
 @export var vitals_container: Container
 @export var hull_bar: ProgressBar
 @export var shield_bar: ProgressBar
+@export var energy_bar: ProgressBar
 @export var pick_sound: AudioStreamPlayer
 
 var _target: Ship = null
@@ -17,6 +18,7 @@ func _on_player_ship_target_changed(_player_ship: Ship, targeted_ship: Ship) ->
     if self._target != null:
         self._target.ship_hull_changed.disconnect(_on_target_ship_hull_changed)
         self._target.ship_shield_changed.disconnect(_on_target_ship_shield_changed)
+        self._target.ship_energy_changed.disconnect(_on_target_ship_energy_changed)
     
     self._target = targeted_ship
 
@@ -30,8 +32,10 @@ func _on_player_ship_target_changed(_player_ship: Ship, targeted_ship: Ship) ->
 
         targeted_ship.ship_hull_changed.connect(_on_target_ship_hull_changed)
         targeted_ship.ship_shield_changed.connect(_on_target_ship_shield_changed)
+        targeted_ship.ship_energy_changed.connect(_on_target_ship_energy_changed)
         self._update_hull()
         self._update_shield()
+        self._update_energy()
 
 func _on_target_ship_hull_changed(ship: Ship) -> void:
     assert(ship == self._target, "Should only be notified about changes to the target")
@@ -41,6 +45,10 @@ func _on_target_ship_shield_changed(ship: Ship) -> void:
     assert(ship == self._target, "Should only be notified about changes to the target")
     self._update_shield()
 
+func _on_target_ship_energy_changed(ship: Ship) -> void:
+    assert(ship == self._target, "Should only be notified about changes to the target")
+    self._update_energy()
+
 func _update_hull() -> void:
     assert(self._target.ship_def.hull > 0.0, "Ship definition should not have 0 hull")
     self.hull_bar.max_value = self._target.ship_def.hull
@@ -49,3 +57,7 @@ func _update_hull() -> void:
 func _update_shield() -> void:
     self.shield_bar.max_value = 1.0 if is_zero_approx(self._target.ship_def.shield) else self._target.ship_def.shield
     self.shield_bar.value = self._target.shield
+
+func _update_energy() -> void:
+    self.energy_bar.max_value = 1.0 if is_zero_approx(self._target.ship_def.energy) else self._target.ship_def.energy
+    self.energy_bar.value = self._target.energy
diff --git a/ships/corvette01/corvette01.tres b/ships/corvette01/corvette01.tres
index 0ea5f0f1..1b318e65 100644
--- a/ships/corvette01/corvette01.tres
+++ b/ships/corvette01/corvette01.tres
@@ -6,9 +6,13 @@
 script = ExtResource("1_3j2tk")
 mass_kg = 10.0
 hull = 40.0
-shield = 2.08165e-12
+shield = 0.0
 thrust = 200.0
 torque = 8.0
 fire_interval_msec = 200
 fire_force = 2.0
 hyperspace_arrival_radius = 8.0
+energy = 100.0
+energy_recharge_rate = 5.0
+thrust_energy_consumption = 8.0
+shield_recharge_rate = 0.0
diff --git a/ships/frigate03/frigate03.tres b/ships/frigate03/frigate03.tres
index 3e94de9b..9e8a5506 100644
--- a/ships/frigate03/frigate03.tres
+++ b/ships/frigate03/frigate03.tres
@@ -12,3 +12,7 @@ torque = 1.0
 fire_interval_msec = 1000
 fire_force = 2.0
 hyperspace_arrival_radius = 8.0
+energy = 300.0
+energy_recharge_rate = 2.0
+thrust_energy_consumption = 5.0
+shield_recharge_rate = 10.0
diff --git a/ships/pirate.gd b/ships/pirate.gd
index 0f5b7b2e..9ab2c82a 100644
--- a/ships/pirate.gd
+++ b/ships/pirate.gd
@@ -72,7 +72,7 @@ func _pointing_in_direction(direction: Vector3) -> bool:
     var current_direction = -self.global_transform.basis.z
     return current_direction.angle_to(direction) <= self._direction_tolerance_rad
 
-func _patrol_behavior(_delta: float):
+func _patrol_behavior(delta: float):
     self.set_target(self._find_closest_ship())
     if self.target != null:
         self._current_state = State.ENGAGE
@@ -82,9 +82,9 @@ func _patrol_behavior(_delta: float):
     if direction_to_target.length() < self.patrol_target_tolerance: # Close enough to current patrol point
         self._select_new_patrol_target()
     elif self._pointing_in_direction(direction_to_target.normalized()):
-        self.thrust_step(1.0)
+        self.thrust_step(1.0, delta)
 
-func _engage_behavior(_delta: float):
+func _engage_behavior(delta: float):
     if self.target == null:
         self._current_state = State.PATROL
         return
@@ -96,25 +96,25 @@ func _engage_behavior(_delta: float):
         return
 
     if distance > self.preferred_distance + self.distance_hysteresis:
-        self.thrust_step(1.0)
+        self.thrust_step(1.0, delta)
     elif distance < self.preferred_distance - self.distance_hysteresis:
         self._current_state = State.RETREAT
     else:
         # Maintain distance
         if abs(distance - self.preferred_distance) > self.distance_hysteresis / 2:
-            self.thrust_step(0.5) # Use half thrust for small adjustments
+            self.thrust_step(0.5, delta) # Use half thrust for small adjustments
     
     if distance <= self.fire_range:
         self.fire()
 
-func _retreat_behavior(_delta: float):
+func _retreat_behavior(delta: float):
     if self.target == null:
         self._current_state = State.PATROL
         return
 
     var distance = self.global_transform.origin.distance_to(self.target.global_transform.origin)
     if self._pointing_in_direction(self._desired_direction()):
-        self.thrust_step(1.0)
+        self.thrust_step(1.0, delta)
     
     if distance >= self.preferred_distance:
         self._current_state = State.ENGAGE
diff --git a/ships/player.gd b/ships/player.gd
index 0825bbc9..f9d9a7c9 100644
--- a/ships/player.gd
+++ b/ships/player.gd
@@ -52,7 +52,9 @@ func _next_ship_target() -> Ship:
 
     return ships[index + 1] if index + 1 < ships.size() else null
 
-func _process(_delta: float) -> void:
+func _process(delta: float) -> void:
+    super(delta)
+
     if self.hyperspace_controller.jumping:
         return
     
@@ -66,14 +68,14 @@ func _absolute_input_direction() -> Vector3:
     var input_direction := Input.get_vector("move_left", "move_right", "move_up", "move_down")
     return Vector3(input_direction.x, 0, input_direction.y)
 
-func _physics_process(_delta: float) -> void:
+func _physics_process(delta: float) -> void:
     if self.hyperspace_controller.jumping:
         return
 
     match UserPreferences.control_scheme:
         UserPreferences.ControlScheme.RELATIVE:
             if Input.is_action_pressed("thrust"):
-                self.thrust_step(1.0)
+                self.thrust_step(1.0, delta)
             else:
                 self.thrust_stopped()
         
@@ -81,7 +83,7 @@ func _physics_process(_delta: float) -> void:
             var desired_direction := self._absolute_input_direction()
             var current_direction := - self.transform.basis.z
             if desired_direction != Vector3.ZERO and desired_direction.angle_to(current_direction) <= ABSOLUTE_DIRECTION_TOLERANCE_RAD:
-                self.thrust_step(desired_direction.length())
+                self.thrust_step(desired_direction.length(), delta)
             else:
                 self.thrust_stopped()
 
diff --git a/ships/ship.gd b/ships/ship.gd
index a02f31d7..e5430b85 100644
--- a/ships/ship.gd
+++ b/ships/ship.gd
@@ -36,6 +36,9 @@ signal ship_hull_changed(ship: Ship)
 ## Fires when this ship's shield strength changes (e.g., due to damage).
 signal ship_shield_changed(ship: Ship)
 
+## Fires when this ship's energy level changes.
+signal ship_energy_changed(ship: Ship)
+
 ## Fires when this ship is destroyed, before the node is freed.
 signal ship_destroyed(ship: Ship)
 
@@ -52,6 +55,11 @@ var hull: float
 ## This property should not be written to outside the class!
 var shield: float
 
+## The ship's current energy level.
+##
+## This property should not be written to outside the class!
+var energy: float
+
 ## The ship's current target.
 ##
 ## This property should not be written to outside the class!
@@ -67,9 +75,11 @@ func _ready() -> void:
     assert(self.hull > 0, "Hull must be greater than 0")
 
     self.shield = self.ship_def.shield
+    self.energy = self.ship_def.energy
 
     self.emit_signal("ship_hull_changed", self)
     self.emit_signal("ship_shield_changed", self)
+    self.emit_signal("ship_energy_changed", self)
 
 ## Damage this ship by the [code]shield[/code] and [code]hull[/code] amounts specified in the given dictionary.
 ##
@@ -132,13 +142,21 @@ func _explode() -> void:
 ## Invoked by subclasses to apply a thrust force to the ship.
 ##
 ## This is expected to be invoked during a physics step (i.e., [code]_physics_process[/code]) and not otherwise.
-func thrust_step(magnitude: float) -> void:
+func thrust_step(magnitude: float, step_delta: float) -> void:
+    if is_zero_approx(self.energy):
+        self.thrust_stopped()
+        return
+
     if self.thruster_audio.stream_paused:
         self.thruster_audio.stream_paused = false
-    elif !self.thruster_audio.playing:
+    if !self.thruster_audio.playing:
         self.thruster_audio.play()
 
-    self.apply_central_force(self.transform.basis * Vector3.FORWARD * self.ship_def.thrust * magnitude)
+    var desired_energy = self.ship_def.thrust_energy_consumption * magnitude * step_delta
+    var energy_consumed = minf(self.energy, desired_energy)
+    self.energy -= energy_consumed
+    self.apply_central_force(self.transform.basis * Vector3.FORWARD * self.ship_def.thrust * magnitude * (energy_consumed / desired_energy))
+    self.emit_signal("ship_energy_changed", self)
 
 ## Invoked by subclasses on physics steps where no thrust should be applied.
 func thrust_stopped() -> void:
@@ -167,3 +185,26 @@ func set_targeted_by_player(targeted: bool) -> void:
 func _on_ship_destroyed(ship: Ship) -> void:
     assert(ship == self.target, "Should only receive ship destruction notification from current target")
     self.set_target(null)
+
+func _process(delta: float) -> void:
+    # Ordering is important here: always recharge the shield and then recharge energy (if applicable).
+    self._recharge_shield(delta)
+    self._recharge_energy(delta)
+
+func _recharge_energy(delta: float) -> void:
+    if is_zero_approx(self.ship_def.energy_recharge_rate) or is_equal_approx(self.energy, self.ship_def.energy):
+        return
+
+    self.energy = minf(self.energy + self.ship_def.energy_recharge_rate * delta, self.ship_def.energy)
+    self.emit_signal("ship_energy_changed", self)
+
+func _recharge_shield(delta: float) -> void:
+    if is_zero_approx(self.ship_def.shield_recharge_rate) or self.energy <= 0.0 or is_equal_approx(self.shield, self.ship_def.shield):
+        return
+
+    var shield_increase = minf(self.energy, self.ship_def.shield_recharge_rate * delta)
+    self.shield = minf(self.shield + shield_increase, self.ship_def.shield)
+    self.energy -= shield_increase
+    
+    self.emit_signal("ship_shield_changed", self)
+    self.emit_signal("ship_energy_changed", self)
diff --git a/ships/ship_def.gd b/ships/ship_def.gd
index 57acb5f6..21af2534 100644
--- a/ships/ship_def.gd
+++ b/ships/ship_def.gd
@@ -28,3 +28,15 @@ class_name ShipDef
 
 ## When arriving from a hyperspace jump, the ship's position will be randomized around the system center. This is the maximum radius (in m) that the randomized position is allowed to occupy.
 @export var hyperspace_arrival_radius: float
+
+## The maximum energy capacity of the ship.
+@export var energy: float
+
+## The rate at which the ship's energy recharges per second.
+@export var energy_recharge_rate: float
+
+## The amount of energy consumed per second when thrusting at full power.
+@export var thrust_energy_consumption: float
+
+## The rate at which shields recharge per second when energy is available.
+@export var shield_recharge_rate: float