The ISO standard is set up for more of a rigorous standard control on what is to be stipulated through the policy. The ISO standard requires commitment related to the purchase of energy efficient products and services. The British standard only requires the consideration of energy consumption when purchasing consuming equipment. The ISO standard also requires a commitment for the required resources to achieve objectives and targets.

Energy Procurement
ISO 50001 standard puts more emphasis on the actual procurement of energy services, products, equipment and energy by having its own section for it. Procurement was just broadly included within the BS EN 16001. There is a clearer emphasis on ISO 5001 for its energy supply as BS 16001 deals more with the energy efficiency. ISO 50001 focusses more on renewables and carbon intensity relating to energy supply and BS 16001 considers energy performance criteria in the purchase of equipment.

MORE Details >>BS 16001 2009 Energy Management Systems Certification Services

By India-mart BS 16001 2009 Energy Management Systems Certification Services 

There are a number of areas that ISO 5001 and BS EN 16001 differentiate themselves from one another

By SSQI.IN  BS 16001 2009 Energy Management Systems Certification Services