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Definition

Power Purchase Agreement

PPA

A long-term contract between a power generator and an offtaker (utility, corporate, or ISO) specifying price, delivery point, operating requirements, and performance guarantees. Primary financing instrument for renewable energy projects.

Related terms

Payload

The instrument or system that performs the mission's primary function. For Earth observation: cameras or sensors. For co...

Perigee

The point in an orbit closest to the central body. For Earth orbits, the lowest altitude above Earth's surface....

Phase Gate

A review milestone where a program's readiness to proceed to the next development phase is evaluated. Standard gates inc...

Power Budget

An accounting of electrical power generation (solar panels, batteries) and consumption (subsystems, payload, heaters) ac...

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