diff --git a/sparkgenerators/burnergenerator.lua b/sparkgenerators/burnergenerator.lua
index 7d4fe5e..037c278 100644
--- a/sparkgenerators/burnergenerator.lua
+++ b/sparkgenerators/burnergenerator.lua
@@ -35,12 +35,12 @@ minetest.register_node(minetest.get_current_modname() .. ":burnergenerator", {
     local inv = meta:get_inventory()
     local itemlist = inv:get_list("fuel")
     local fuel, product = minetest.get_craft_result({method = "fuel", width = 1, items = itemlist})
-
-    if fuel["time"] ~= 0 then
+    local node = minetest.get_node(pos)
+    if fuel["time"] ~= 0 and (fuel["time"] * 10 + meta:get_int("energy") <=  tonumber(minetest.get_item_group(node.name,"sparktech_energy_max"))) then
+	  
       inv:set_stack("fuel", 1, product["items"][1])
       meta:set_int("energy", meta:get_int("energy") + fuel["time"] * 10)
     end
-
     minetest.get_node_timer(pos):start(1)
   end
 })