Understanding Power Purchase Agreements in British Columbia
Power purchase agreements, known as PPAs, are long-term contracts that specify the price, volume, and conditions under which an independent power producer delivers electricity to a utility. In British Columbia, where BC Hydro has been the principal buyer of independently generated power, securing a PPA is the financial cornerstone of any clean energy project.
What a PPA Covers
A PPA sets out the fundamental commercial terms of a power sale. These typically include the contracted capacity and annual energy delivery targets, the electricity price (expressed in dollars per megawatt-hour), the term of the agreement, the delivery point on the grid, curtailment provisions, and the obligations of each party in the event of force majeure or project underperformance.
The specificity of these terms matters enormously for project finance. Lenders extending debt to an independent power producer need to be confident that revenue will be sufficient to service that debt over the life of the loan. A PPA with a creditworthy counterparty — in this case BC Hydro, a provincial Crown corporation — provides the predictable cash flow stream that makes infrastructure lending viable.
The BC Hydro Standing Offer Programme
BC Hydro has historically offered smaller independent producers access to power procurement through its Standing Offer Programme (SOP). Projects below a defined capacity threshold — typically 15 to 50 megawatts depending on the programme iteration — could apply for a standard form contract at a published price without going through a competitive tender process. This simplified pathway was designed to lower transaction costs for small run-of-river, wind, and biomass developers.
The SOP has been opened and closed several times over the years as BC Hydro’s assessment of its need for new supply has shifted. The programmes most active between 2008 and 2014 generated a substantial pipeline of small clean energy projects across British Columbia.
How Electricity Prices Are Set
Electricity prices in BC Hydro PPAs have generally been determined through one of two mechanisms: administratively set rates published in advance (as in the SOP), or competitively bid rates established through an Energy Call process. In competitive calls, independent producers submit bid prices, and BC Hydro selects projects up to a target volume in order of cost.
Prices are typically structured with a flat rate or a rate that escalates with inflation over the contract term. The two-period pricing common in earlier BC Hydro programmes distinguished between on-peak and off-peak energy, reflecting the higher value of power delivered during winter months when provincial demand is highest.
Term Length and Project Finance
Run-of-river and wind projects involve high upfront capital costs and low operating costs over their lifetimes. Long contract terms — commonly 20 to 40 years — allow developers to amortise construction debt over a period that matches project economics. With a 35-year PPA in place, a developer can access non-recourse project financing where the lender’s security is the future contracted revenue stream rather than corporate balance sheet assets.
This structure is standard in infrastructure finance globally, but it depends on the PPA counterparty maintaining its creditworthiness over decades. BC Hydro’s status as a provincial Crown corporation, backed implicitly by the government of British Columbia, has historically satisfied this requirement for project lenders.
Risk Allocation Between Parties
PPAs allocate risk between the generator and the utility. The generator typically bears hydrological risk — if the river flows less than expected, it generates less energy and earns less revenue. The utility bears the obligation to take and pay for delivered energy at the contracted price, regardless of whether it has a buyer for that energy at the moment of delivery.
Curtailment provisions — which allow BC Hydro to instruct a generator to reduce output — introduce complexity. If curtailment is frequent, it can undermine project revenue projections. BC’s newer procurement frameworks have addressed curtailment risk through contract language that compensates generators for energy they were directed not to deliver.
Recent Changes to BC’s Procurement Approach
Since the early 2010s, BC Hydro’s procurement of new independent power has slowed substantially, as the utility’s load growth fell short of earlier forecasts and existing supply proved sufficient. The focus has shifted toward long-term planning that anticipates future electrification demand — from transportation, space heating, and industrial loads — rather than immediate supply procurement. Natural Resources Canada provides context on how national clean energy policy intersects with provincial procurement decisions.
Independent producers active in BC continue to position their projects for the next generation of procurement activity, which analysts expect to be driven by rising electricity demand associated with the province’s CleanBC electrification commitments and potential growth in the LNG sector.