More like a way to fix the mess in the Former Yugoslavia by getting the successor republics (plus Albania and the two accession candidates Romania and Bulgaria) to join the existing EU common market for electricity and gas. The link to the Commission's fact sheet seems to be broken (or the EU server has trouble) but the Athens Memorandum is actually called MOU on the Regional Electricity Market in South East Europe and its Integration into the European Union Internal Electricity Market.

I would like to know more about the internal electricity and gas market.

A society committed to the notion that government is always bad will have bad government. And it doesn't have to be that way. — Paul Krugman