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title: SREC Basics | Sol Systems Knowledge Base
description: Learn the basics of how SRECs work
---

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1. [Sol Systems Knowledge Base](https://help.srecs.solsystems.com/)
2. [SREC Basics](https://help.srecs.solsystems.com/srec-basics)

# SREC Basics

 Learn the basics of how SRECs work

- [What's an SREC?](https://help.srecs.solsystems.com/what-is-an-srec)
- [Do SRECs ever expire?](https://help.srecs.solsystems.com/do-srecs-ever-expire)
- [What is NEPOOL-GIS?](https://help.srecs.solsystems.com/nepool-gis)
- [¿son los SRECS?](https://help.srecs.solsystems.com/son-los-srecs)
- [What is PJM Interconnection?](https://help.srecs.solsystems.com/pjm-interconnection)
- [Why do SRECs have different prices in different states?](https://help.srecs.solsystems.com/why-do-srecs-have-different-prices-in-different-states)
- [How much will SRECs be worth in the future?](https://help.srecs.solsystems.com/how-much-will-srecs-be-worth-in-the-future)
- [Alternative Compliance Payment (ACP)](https://help.srecs.solsystems.com/alternative-compliance-payment-acp)
- [Why do SRECs have value?](https://help.srecs.solsystems.com/why-do-srecs-have-value)
- [Renewable Portfolio Standard (RPS)](https://help.srecs.solsystems.com/renewable-portfolio-standard-rps)
- [Does my system need to be interconnected to the grid to produce SRECs? Can I go off-the-grid?](https://help.srecs.solsystems.com/does-my-system-need-to-be-interconnected-to-the-grid-to-produce-srecs-can-i-go-off-the-grid)
- [What is a state certification number?](https://help.srecs.solsystems.com/state-certification-number)
- [Transferring Legacy SRECs to Sol Systems](https://help.srecs.solsystems.com/transferring-legacy-srecs-to-sol-systems)

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- [Payments](https://help.srecs.solsystems.com/payments)
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