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​​​​​​​​​​​​​​​​A Connection Impact Assessment (CIA) is a more detailed assessment of a project’s impact to the grid. The results include a technical report outlining project feasibility, technical specifications needed for the project, and the impacts the project would have on the distribution grid.

​​​​​​​​​​​​​

​​​​​​​​​​​​​​​​The Generator is required to submit a completed CIA (form found here) along with a Distribution Operating Map (DOM), payment for the CIA and a signed Study Agreement. 

​​​​​​​​​​​​​​​​Please email ​​​​​​​​​​​​​DxGenerationConnections@HydroOne.com or call 1-877-447-4412 (choose option #2) for a Study Agreement suited to your project size.

A complete CIA application consists of:
  • Completed and signed CIA Form

  • Payment in full by cheque payable to “Hydro One Networks Inc." (see CIA Fee Schedule below)

  • Signed Study Agreement

  • Single Line Diagram (SLD)

  • Distribution Operating Map (DOM) (not required for existing load customers that are connecting a load displacement generation, net metering generation or energy storage system behind their existing metered connection point)

  • All technical submissions (Form B, single line diagrams, etc.) for projects greater than 10 kW must be signed and sealed by a licensed Ontario Professional Engineer (P.Eng).​​​​​​​​​​​​​​​​

Notice: New CIA fees to be implemented July 1, 2019

CIA Category Applicable Project Type/Size Cost
Small Projects ≤ to 500 kW,
Simplified
All three phase generation project (including net metering, load displacement and energy storage systems) applications that are: a) > 10 kW and ≤ 30 kW connecting to a Hydro One supply feeder with a voltage less than 15 kV;
OR

 b) > 10 kW and ≤ 100 kW connecting to a Hydro One supply feeder with a voltage of 15 kV or greater.

Note: Single phase generation project applications are not eligible for a simplified CIA.

$1,971.27

$2,227.54
(including HST)
Small Projects ≤ to 500 kW 1) All three phase generation project (including load displacement and energy storage systems but excluding net metering) applications that are:
a) > 30 kW and ≤ 250 kW connecting to a Hydro One supply feeder with a voltage less than 15 kV;
OR
b) > 100 kW and ≤ 500 kW connecting to a Hydro One supply feeder with a voltage of 15 kV or greater.

2) Single phase generation projects (excluding net metering) applications connecting to a Hydro One supply feeder that are greater than 10 kW.
 
Note: Single phase generation project applications cannot exceed 150 kW.

$3,266.07

$3,690.66 (Including HST)
 

Small Project Net Metering
1) All three phase net metering generation project applications that are: ​​

a) > 30 kW and ≤ 250 kW connecting to a Hydro One supply feeder with a voltage less than 15 kV;
OR
b) > 100 kW and ≤ 500 kW connecting to a Hydro One supply feeder with a voltage of 15 kV or greater.

2) All single phase net metering generation project applications that are greater than 10 kW.

Note: Single phase generation project applications cannot exceed 150 kW.
$3,192.85

$3,607.92 (Including HST)
​Greater than CAE – Capacity Allocation Required Projects All generation project applications (including net metering, load displacement and energy storage systems) that are:

a) > 250 kW connecting to a Hydro One supply feeder with a voltage less than 15 kV;
OR
b) > 500 kW connecting to a Hydro One supply feeder with a voltage of 15 kV or greater.
 
$8,641.91

$9,765.36 (Including HST)

 

Important Notes:
  • CIA fees represent the costs for performing the Connection Impact Assessment study only.

  • An additional $10,000 will be required for projects that involve another LDC.

  • CIA revisions will be charged 50% of the CIA costs listed in the table above.

  • Refund policy: Any money not spent will be refunded if the CIA is withdrawn before completion.