I use my slow cooker a lot, esp in the colder months. I also have an electric oven and gas hob.
What I would like to do ideally is to work out approx how much it costs me in fuel for the cooking times. So if I was to slow cook something in the oven for 2hrs, vs. my slow cooker for 8 hours how do I go about calculating the cost of the electricity?
The only way I can think of, would be to use a clip-on monitor, which will tell you whole-house energy usage.
The problem is, it will be hard to work out how much of the power is being used by other appliances. Even if you don't use lights, TV, hairdryer, you probably wouldn't want to switch off the fridge and freezer (big power users) during your 8 hour experiment.