Receiver works, probably

entities/receiver/receiver.gd

@@ -1,4 +1,5 @@
 extends Interactable
+class_name Receiver
 
 func _on_interaction_area_body_entered(body: Player) -> void:
 	body.interaction_target = self

entities/receiver/receiver.tscn

@@ -1,11 +1,28 @@
-[gd_scene load_steps=3 format=3 uid="uid://fo3xwyve7i5p"]
+[gd_scene load_steps=6 format=3 uid="uid://fo3xwyve7i5p"]
 
-[ext_resource type="Script" uid="uid://csbip0oj1uu0j" path="res://common/interactable.gd" id="1_iliiv"]
+[ext_resource type="Script" uid="uid://bsmung6fgm53e" path="res://entities/receiver/receiver.gd" id="1_ufwo3"]
 [ext_resource type="Texture2D" uid="uid://bpp73e14xkavd" path="res://entities/receiver/receiver.aseprite" id="2_iyevf"]
+[ext_resource type="Script" uid="uid://dryjau28sybgd" path="res://common/interactable_body.gd" id="3_iyevf"]
+[ext_resource type="Script" uid="uid://ca1xtf0wra515" path="res://entities/receiver/receiver_energy_acceptor.gd" id="4_ufwo3"]
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_ufwo3"]
+size = Vector2(26, 26)
 
 [node name="Receiver" type="Node2D"]
-script = ExtResource("1_iliiv")
+script = ExtResource("1_ufwo3")
 metadata/_custom_type_script = "uid://csbip0oj1uu0j"
 
 [node name="Sprite2D" type="Sprite2D" parent="."]
 texture = ExtResource("2_iyevf")
+
+[node name="InteractableBody" type="StaticBody2D" parent="."]
+script = ExtResource("3_iyevf")
+metadata/_custom_type_script = "uid://dryjau28sybgd"
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="InteractableBody"]
+shape = SubResource("RectangleShape2D_ufwo3")
+
+[node name="EnergyAcceptor" type="Node2D" parent="InteractableBody" node_paths=PackedStringArray("receiver")]
+script = ExtResource("4_ufwo3")
+receiver = NodePath("../..")
+metadata/_custom_type_script = "uid://dlvp76hruxh7u"

entities/receiver/receiver_energy_acceptor.gd

@@ -0,0 +1,9 @@
+extends EnergyAcceptor
+
+@export var receiver: Receiver
+
+func energize(energy: float, position: Vector2):
+	receiver.modulate = Color.GREEN
+	
+func deplete():
+	receiver.modulate = Color.WHITE

entities/receiver/receiver_energy_acceptor.gd.uid

@@ -0,0 +1 @@
+uid://ca1xtf0wra515