SRECs expire after 3 to 5 years
In most markets, SRECs expire after 3 years. While the SREC itself won't disappear from your Sol Systems account or from GATS, it will no longer be eligible for sale.
As SRECs approach expiration, they often become less attractive and therefore become harder to sell. It's best to sign up to sell SRECs as soon as your system is turned on, or even before, to get the best price.
Legacy SRECs can still be sold
If your system produced SRECs within the last few years, they can be transferred to Sol Systems to be sold.