Total Capacity
INSTALLED CAPACITY
-- MW
TOTAL
Last updated December 2015


The pie chart and table show Ontario's total installed generating capacity. This is the theoretical maximum generating capability if every source was able to contribute 100% of their potential to the grid. The amount each generation type actually has available or produces at any one time depends on outages, availability and market factors.

SUPPLY MIX

The combination of all sources to meet day-to-day electricity demand is called the 'supply mix' and changes hour by hour. Ontario relies on a dynamic mix of generation types to power the grid including nuclear, hydro, gas/oil, wind, biofuel and solar.


EMBEDDED GENERATION

Embedded wind and solar facilities are estimated to reach 2,500 megawatts (MW) of capacity by May 2015. Solar generation in particular reduces summer peaks when air conditioning use is at its highest. Producing electricity closer to where it's consumed, embedded generation has the added benefit of relieving congestion along the transmission lines and reducing line losses.


EMBEDDED GENERATION REPORTING

The IESO who manage Ontario's grid, are currently registering embedded variable generators with its centralized forecasting service. As more data becomes available, these forecasts may be included in future updates of Gridwatch.