Efergy makes a inductive clamp energy monitor. It installs easily at you main panel, clamps slip over your electrical service wires. You can watch the power go up as everything runs. it also has a settable alarm if you exceed your set power limit. and keeps track of a weekly history. They sell on amazon and ebay for about $100. Well worth it.
http://www.amazon.com/Efergy-Elite-W...eywords=efergy