SGI-1 is a notification-only process. To qualify for this category, a generation installation must meet the following criteria. 

• All generation / storage devices are each rated at no more than 16A and the total of all ratings is also no more than 16A
• All generation is installed on an existing premise
• All existing and new generation is fully type tested
• Basic design capacity of each generation unit is ≤32A
• Any generation unit with a basic design capacity >16A is limited to 16A or below, using the manufacturer’s facility to limit
• Sum of all the ratings of all equipment is no more than 16A per phase

SGI-2 is an application process followed by a notification within 28 days of commissioning. To qualify for the SGI-2 pathway, your generation installation must meet the following criteria:

• All generation / storage devices are each rated at no more than 16A and the total of all ratings is also no more than 32A. Any G100 scheme limits the export to the distribution network to no more than 16A.
• All generation is installed on an existing premise
• All existing and new generation is fully type tested
• Basic design capacity of each generation unit is ≤32A
• Any generation unit with a basic design capacity >16A is limited to 16A or below, using the manufacturer’s facility to limit
• Sum of all the ratings of all equipment is no more than 16A per phase

SGI-3 is an application process followed by a notification within 28 days of commissioning. To qualify for the SGI-3 pathway, your generation installation must meet the following criteria:

• All generation / storage devices are each rated at no more than 32A and the total of all ratings is also no more than 60A. Any G100 scheme limits the export to the distribution network to no more than 32A.
• All generation is installed on an existing premise
• All existing and new generation is fully type tested
• Basic design capacity of each generation unit is ≤32A
• Sum of all the ratings of all equipment is no more than 60A per phase