SRP is a community-based, not-for-profit public power utility serving more than one million customers, including in Apache Junction. (Submitted photo)

Salt River Project has issued an all-source request for proposals for up to 650 megawatts of capacity to meet future peak-hour demand requirements.

SRP is asking for respondents to provide a variety of cost-competitive potential peak capacity solutions, including battery/energy storage charged by a renewable resource or the grid, demand response resource options, existing combined cycle natural gas power plants and simple cycle gas turbines, according to a release.

SRP’s peak capacity need is driven by expected future peak-hour demand growth, the loss of peak capacity due to anticipated plant retirements and the need for increased system flexibility that is driven by the variable operating characteristics of renewable generating resources such as solar and wind.

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