The region has a relatively good transmission and interconnector system, however due to its age it needs to be upgraded in many parts and further extension is also needed, so as to ensure better connectivity but also as a way to match the rising demand and ensure security of supply. The longest transmission network is located in Serbia with a total length of 9504 km of transmission lines, Bosnia and Herzegovina with 6321 km, Albania with 3298km, Macedonia 2458 km, Kosovo 1358 km, and Montenegro with 1300 km. Total power transmission line for WB6 countries is 24,234 km in 2016. The country with the most interconnectors is Bosnia and Herzegovina with 37 of them. Serbia has 22 interconnecting lines, Montenegro 11, Kosovo has 8, Albania 6, Macedonia 4. One of the main issues with the grid in the WB6 can be considered the peaking demand, and seasonal variation. Particularly so in the winter season which can create problems with the grid and is an issue that plagues nearly all the countries. This is a direct result of using electricity as a means to heat spaces. There are new interconnection lines being built between Italy and Montenegro, Macedonia and Albania, Serbia and Romania has been already completed, etc., and many others being planned. All these projects are important to ensure energy security and affordability as foreseen through the European Connectivity agenda. In terms of energy security, the energy supply is an important factor in the politics of the countries as well.
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