[amazon-web-services] Do you get charged for a 'stopped' instance on EC2?

No.

You get charged for:

  1. Online time
  2. Storage space (assumably you store the image on S3 [EBS])
  3. Elastic IP addresses
  4. Bandwidth

So... if you stop the EC2 instance you will only have to pay for the storage of the image on S3 (assuming you store an image ofcourse) and any IP addresses you've reserved.