Trilby's solar panels PR but improved.

code/game/objects/items/stacks/sheets/sheets.dm

@@ -15,4 +15,16 @@
 	var/point_value = 0 //turn-in value for the gulag stacker - loosely relative to its rarity
 	var/is_fabric = FALSE //is this  a valid material for the loom?
 	var/loom_result //result from pulling on the loom
-	var/pull_effort = 0 //amount of delay when pulling on the loom
+	var/pull_effort = 0 //amount of delay when pulling on the loom
+	var/shard_type // the shard debris typepath left over by solar panels and windows etc.
+	var/solars_multiplier = 1
+
+/**
+  * Called on the glass sheet upon solar construction (duh):
+  * Different glass sheets can modify different stas/vars, such as obj_integrity or efficiency
+  * and possibly extra effects if you wish to code them.
+  * Keep in mind the solars' max_integrity is set equal to the obj_integrity by the end of the initialization,
+  * so you don't have to do so here.
+  */
+/obj/item/stack/sheet/proc/on_solar_construction(/obj/machinery/power/solar/S)
+	return