Power Purchase Agreement Capacity: Everything You Need to Know

If you`re in the renewable energy industry or simply interested in the sustainability movement, you`ve likely come across the term “power purchase agreement” (PPA). This type of contract allows businesses and organizations to purchase renewable energy from off-site sources, such as wind or solar farms. But what is PPA capacity, and why does it matter? In this article, we`ll answer these questions and more.

What is PPA Capacity?

PPA capacity refers to the amount of energy that can be generated by a renewable energy project. When a renewable energy company enters into a PPA with a customer, they agree to supply a certain amount of energy over a specific period of time. This quantity is known as the PPA capacity.

For example, let`s say a wind farm has a capacity of 100 megawatts (MW). If a business enters into a PPA with the wind farm for 50 MW over the next 20 years, that business has purchased half of the wind farm`s total capacity.

Why Does PPA Capacity Matter?

PPA capacity is important for a few reasons. First, it determines how much renewable energy a business can purchase from a specific project. Second, it can impact the price of the energy. If a project has a high PPA capacity, the cost per unit of energy may be lower, since there are more units to spread the fixed costs across.

Additionally, PPA capacity can play a role in renewable energy project financing. Banks and investors may be more likely to provide funding for a project with a high PPA capacity, since there is a larger guaranteed revenue stream.

How is PPA Capacity Determined?

PPA capacity is determined by a number of factors, including the size and output of the renewable energy project, the length of the contract, and the needs of the customer. In general, the PPA capacity should be based on the energy needs of the customer, as well as any goals they may have for reducing their carbon footprint.

It`s worth noting that PPA capacity isn`t set in stone. Depending on the terms of the contract, it may be possible for the customer to adjust the capacity up or down over time. This flexibility can be especially valuable for businesses that are expanding or contracting, or that are looking to increase their sustainability goals over time.


PPA capacity is a critical factor in renewable energy purchasing and project financing. It determines how much energy a business can purchase from a specific project, impacts the cost of the energy, and can influence investor interest in the project. By understanding how PPA capacity is determined and why it matters, you can make informed decisions about your renewable energy procurement strategy.