Electricity Supply

Energy is at the core of the Société Monégasque de l'Electricité et du Gaz’s activity.


The quality of the electricity supplied

Segmentation of the 521 GWh supplied in 2016 by sector

Public lighting :  7,7 GWh

​Industry : 35,5 GWh

Residential and General Services : 89,4 GWh

Tertiary : 388,8 GWh

The fall in electricity consumption in 2016 was -15.8 GWh. It can be broken down as follows:

  • the effect of climatic contingencies was -6.2 GWh;
  • a fall of -6.6GWh was due to the final closure of three industrial sites and the demolition of buildings with a view to future reconstruction;
  • a reduction of -3.8 GWh was due to energy efficiency actions.

Only a single consumption of +0.8 GWh, which was associated in particular with 29 February 2016, offset this trend in some way.


Technical features


  Length of the network

  High voltage B 63 kV                    3 km

  High voltage A 20 kV                  81 km 

  voltage                                        78 km


  2 delivery point substations HTA/BT


  Fontvieille                 63 kV /20 kV

  Sainte-Dévote          63 kV /20 kV

   Public lighting

  Lighting system                          7 200



  Number of substations HTA/LV

  Public                         200

  Private                        108


List of criteria taken into account to establish the statistics:

  1. All power cuts stemming from low voltage, high voltage A or from the high voltage B network

  2. Minimum number of customers taken into for an outage: 1

  3. Minimum duration taken into account for an outage: 1second


Average outage time per customer :

According to the criteria established by the licensing authority, the average outage time per customer was 8 minutes and 5 seconds in 2016.

This is lower than in the two previous years (9 minutes and 47 seconds in 2014 and 9 minutes and 10 seconds in 2015).

While outages due to scheduled works remained stable, the increase in the average outage period due to breakdowns was essentially due to a malfunction in a transformer, which contributed 1 minute and 32 seconds to the average outage time. It should be noted that significant reduction in outage time associated to accidents is the result of an absence of outages affecting the 63 kV lines.

The SAIDI (System Average Interruption Duration Index), which shows the average annual time during which supply to a customer is interrupted (interruptions longer than 3 minutes) was 8 minutes and 13 seconds in 2016.

The amount of undistributed energy (END = 13) was equivalent to that of 2015. This is due in particular to the fact the END following outages for scheduled works was set off by a reduction in END due to breakdowns or accidents, which only represented 27% of the total END in 2016, compared with 45% in 2015.