what is a solar PPA offtaker?

What Is An “Offtaker” In A Solar PPA?

If you are researching the cost of solar panels and solar power purchase agreements you may have seen the word “offtaker” and wondered … What is an offtaker in a solar PPA?

Put simply, an “offtaker” is the purchaser of renewable energy in a solar development project. 

What Is An Offtaker In A Solar PPA?

An “offtaker” is one of three parties in a solar development project called a power purchase agreement, aka “PPA“. 

There are three parties to a PPA:

  1. The Solar Developer 
  2. The Solar IPP or Investor
  3. The Solar Offtaker

The solar developer identifies the opportunity, such as a big roof, or large piece of property that would be ideal for commercial or community solar. 

The solar developer structures and designs the project as well as securing approvals and permits. Depending on the solar developer’s strategy, the solar developer may keep solar projects “on balance sheet” or sell them to an independent power producer (IPP) and/or investors. 

A solar independent power producer (IPP) buys projects that are ready to build, thanks to the solar developer.

A solar IPP may partner with a solar investor to fund the project. A solar investor may be part of a capital stack that includes other equity and debt from a lender, such as Wunder Capital

The investor may be a solar tax equity partner who has tax appetite for incentives (such as the solar ITC) and wants to finance the project. 

What is an Offtaker in a Solar PPA?

The Importance of the Offtaker

Regardless, the developer wants to find a credit-worthy offtaker to purchase the renewable energy produced by the project. 

Creditworthiness is important to the developer, investor and/or lender because the offtaker is committing to purchasing the renewable energy from the project for up to 25 years.  

Offtakers have wide-ranging levels of creditworthiness and credit scores… At the high-end of the credit spectrum are public companies like Google, Apple or Microsoft. They are like “super offtakers“… Because they have impeccable, investment grade credit and they buy a ton of renewable energy! 

The rest of the offtaker world spans a broad range of credit rated borrowers that will be subject to financial credit and risk analysis. Indeed, some private companies, schools, municipalities, non-profits, etc. may have no credit rating at all.1

Below is a diagram of a solar PPA in which the offtaker is a school. 

In this example, the school wants to buy the green energy from the solar project, but it doesn’t have the budget to purchase the solar panels itself. Even if it did have the money, the school might not be able to take advantage of the tax benefits of solar. 

The school also has no financial credit rating. 

The investor finances the project to develop the project for the school, in return for a long-term commitment from the school to purchase the renewable energy. 

What Happens in a Solar PPA?

The solar developer identifies an opportunity with the school, ties up the project and secures financing that may include debt or tax equity. 

1. Solar Developer:

The Solar Developer sells a school on a $1 million solar project for their campus. The school agrees that it wants the system, but it can’t pay for the system itself because it doesn’t have the budget. 

Note: The solar developer may be “full service” developer who will design, procure and construct the project, or the developer may hire a 3rd party solar contractor to install the project once the system receives approved by the utility, local municipality, etc.

2. Solar Investor:

Because the school does not want to pay for the system, the solar developer finds a Solar Investor who will pay for the system for the school. In return the solar investor receives tax incentives and a long term stream of cash flow from the school for the renewable energy. 

The investor gets the 30% federal solar investment tax credit (ITC) and MACRS accelerated depreciation to reduce their tax liabilities.2

Depending on the solar financing structure, the solar investor may own the system for a long period of time, or it may lease the solar system back to Solar Developer. If the latter, the Solar Developer would then manage the system and sells the solar energy to the Solar Offtaker (the school) for 20 years.

3. Solar Offtaker

In this example, the Solar Offtaker is the school.

In return for having the solar system installed for free, the school agrees to enter into the PPA to buy solar energy from the investor for 20 years, usually at a discounted rate compared to their utility rate.3

In A Solar PPA… Everybody Wins

In the end, everybody wins in this solar PPA scenario…

The Solar Developer wins because they get to build the solar system for the school and work with the Solar Investor.

The Solar Investor wins because they reduce their tax liabilities through the 30% federal tax credit and other incentives. The investor also gets a stream of cash flows and other financial benefits from the long term lease to the Solar Contractor.

The Solar Offtaker (the school) wins because it gets to buy clean renewable solar energy at a discount from what they would otherwise pay to their utility.


  1. An offtaker can really be any buyer of solar or renewable energy and can be a public company, private party, such as a business, a school, a municipality or a utility. In large utility scale solar arrays the offtaker is usually a utility.
  2. Note I didn't include the benefit of the MACRS accelerated depreciation in this example. It is one of many ways to profit from solar energy.
  3. The length of a solar lease and/or PPA is usually aligned with the useful life of the system. Solar systems can last upwards of 30 years, however, 25 years is common.