The transmission availability test will be performed by the OPA to determine if there is connection availability on the transmission system to connect your renewable energy project.

The test will be performed on both transmission- and distribution-connected projects. Distribution-connected projects must pass the transmission availability test before proceeding to the distribution availability test.

Applications will be assessed in sequential order based on their application time-stamp. 

The transmission availability test considers:

• the existing transmission system (i.e., the IESO-controlled grid)
• committed transmission system upgrades
• existing and committed generation facilities
• the balance between electricity load and generation.

There are three levels of assessment:

1. transformer station test
2. transmission circuit test
3. area test.

Possible results of the transmission availability test are set out below.