What is the difference between micro, mini and small scale generation?

MEC stands for Maximum Export Capacity.

Generation Type Generation Type	Capacity Capacity
Generation Type Micro Generator	Capacity MEC <6KvA
Generation Type Mini Generator	Capacity MEC 6Kva – 11KvA
Generation Type Small Scale Generation	Capacity MEC - >50KvA

For a more detailed breakdown, see below.

1. Micro-Generator is a source of electrical energy which operates in parallel with ESB Networks LV System and rated up to and including:
   25 amperes (≈6kVA) at low voltage [230 volts] when the connection is single phase
   16 amperes(≈11kVA) at low voltage [230/400 volt] when the connection is three-phase
2. Mini-Generation is the term which applies when an electricity customer installs inverter connected generation, within the range:
   25 amperes (6kVA) to 72 amperes (17kVA), when the connection is single-phase 
   16 amperes (11kVA) to 72 amperes (50kVA), when the connection is three-phase
3. Small Scale Generation is the term which applies when an electricity customer installs generation, within the range:
   Inverter-connected Installed Capacity greater than 72amps (≈50kVA) Three Phase and up to 200kVA, or,
   Synchronous Installed Capacity greater than 6kVA and up to 200kVA 
   Note: the maximum single phase connection permitted is 72Amps (≈17kVA

If you have a MEC, you've the option to export to the grid. For Micro/Mini Generation, your NC6/7 form must be submitted to MRSO (ESB Networks). For Small Scale Generation (SRESS), your NC5/8 and WP0014 form must be submitted and processed by MRSO (ESB Networks).

Click here to download the WP14 form. Customers should complete the fields highlighted in green. 

Please visit esbnetworks.ie for details on how to start the process and a step-by-step guide.