diff --git a/GainStation13/code/modules/cargo/packs.dm b/GainStation13/code/modules/cargo/packs.dm
index b9e3bcd9fc..3836cb713a 100644
--- a/GainStation13/code/modules/cargo/packs.dm
+++ b/GainStation13/code/modules/cargo/packs.dm
@@ -4,3 +4,10 @@
 	cost = 10000
 	contains = list(/obj/item/vending_refill/mealdor)
 	crate_name = "meal vendor supply crate"
+
+/datum/supply_pack/engineering/energy_harvester_board
+	name = "Energy Harvester Board"
+	desc = "Engineering made some crazy power device that seems to be creating massive amounts of energy out of thin air? With the parts found in this crate, you'll be able to make some sweet cash out of the engineers hard labor. Half of the credits made by this machine go to the engineering budget."
+	cost = 5000
+	contains = list(/obj/item/circuitboard/machine/energy_harvester)
+	crate_name = "Energy Harvester Board supply crate"
diff --git a/GainStation13/code/modules/power/energy_harvester.dm b/GainStation13/code/modules/power/energy_harvester.dm
index 13140aac73..54af763bb1 100644
--- a/GainStation13/code/modules/power/energy_harvester.dm
+++ b/GainStation13/code/modules/power/energy_harvester.dm
@@ -19,11 +19,16 @@
 	var/power_available = 0
 	var/active = FALSE
 
-/obj/machinery/power/energy_harvester/Initialize(mapload) // TODO: make sure we can only place 4 of those
+/obj/machinery/power/energy_harvester/Initialize(mapload)
 	. = ..()
 	RefreshParts()
 	if(anchored)
 		connect_to_network()
+		if(too_many_harvesters_in_network())
+			src.visible_message("<span class='alert'>[src] buzzes. Seems like there are too many energy harvesters connected to this powernet.</span>")
+			playsound(src, 'sound/machines/buzz-two.ogg', 50)
+			disconnect_from_network()
+			return
 		power_available = avail()
 
 /obj/machinery/power/energy_harvester/RefreshParts()
@@ -46,10 +51,14 @@
 		return
 
 	if(!powernet)
+		src.visible_message("<span class='alert'>[src] buzzes. Seems like it's not connected to a powernet.</span>")
+		playsound(src, 'sound/machines/buzz-two.ogg', 50)
 		return
 
 	power_available = avail()
 	if(power_available <= 0)
+		src.visible_message("<span class='alert'>[src] buzzes. Seems like there is no energy in the connected powernet.</span>")
+		playsound(src, 'sound/machines/buzz-two.ogg', 50)
 		return
 
 	var/power_drain = power_available * set_power_drain
@@ -71,6 +80,11 @@
 	if(. == SUCCESSFUL_UNFASTEN)
 		if(anchored)
 			connect_to_network()
+			if(too_many_harvesters_in_network())
+				src.visible_message("<span class='alert'>[src] buzzes. Seems like there are too many energy harvesters connected to this powernet.</span>")
+				playsound(src, 'sound/machines/buzz-two.ogg', 50)
+				disconnect_from_network()
+				return
 			power_available = avail()
 		else
 			disconnect_from_network()
@@ -79,9 +93,11 @@
 /obj/machinery/power/energy_harvester/screwdriver_act(mob/living/user, obj/item/I)
 	if(..())
 		return TRUE
+
 	if(!active)
 		default_deconstruction_screwdriver(user, "state_open", "state_off", I)
 		return TRUE
+
 	return FALSE
 
 /obj/machinery/power/energy_harvester/wrench_act(mob/living/user, obj/item/I)
@@ -91,6 +107,16 @@
 	
 	return FALSE
 
+/obj/machinery/power/energy_harvester/proc/too_many_harvesters_in_network()
+	var/counter = 0
+	for(var/machine in powernet.nodes)
+		if(istype(machine, /obj/machinery/power/energy_harvester))
+			counter += 1
+			if(counter > 4)
+				return TRUE
+
+	return FALSE
+
 /obj/machinery/power/energy_harvester/ui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)
 	if(!ui)
@@ -119,7 +145,9 @@
 				return
 			if(!anchored)
 				return
-			if(!powernet)
+			if(!active && !powernet)
+				src.visible_message("<span class='alert'>[src] buzzes. Seems like it's not connected to a powernet.</span>")
+				playsound(src, 'sound/machines/buzz-two.ogg', 50)
 				return
 			active = !active
 			. = TRUE