Added attack_ghost to APC and SMES to allow observing

code/modules/power/apc.dm

@@ -724,6 +724,11 @@
 	// do APC interaction
 	src.interact(user)
 
+/obj/machinery/power/apc/attack_ghost(user as mob)
+	if(stat & (BROKEN|MAINT))	
+		return
+	return ui_interact(user)
+
 /obj/machinery/power/apc/interact(mob/user)
 	if(!user)
 		return

code/modules/power/smes.dm

@@ -218,6 +218,8 @@
 	add_fingerprint(user)
 	ui_interact(user)
 
+/obj/machinery/power/smes/attack_ghost(mob/user)
+	ui_interact(user)
 
 /obj/machinery/power/smes/attack_hand(mob/user)
 	add_fingerprint(user)