Casa Grande, Arizona is one of Pinal County’s largest and fastest-growing communities, combining established neighborhoods, newer master-planned developments, Southwestern-style homes, agricultural land, and open desert. Its location between Phoenix and Tucson along the I-10 corridor has contributed to continued residential and commercial growth while preserving much of the area’s distinctive desert and farming character. With intense summer heat and long air-conditioning seasons, Casa Grande households can use substantial amounts of electricity, making energy costs an important consideration for local homeowners.

The primary electricity provider for much of Casa Grande is Arizona Public Service (APS), although utility service can vary by property. APS residential customers already experienced an approximately 8% average bill increase from the rate change that took effect in March 2024, and APS is now pursuing another major rate case before the Arizona Corporation Commission (ACC). Under the current proposal, APS is seeking a 16.44% increase in residential-class revenue; the overall net revenue increase originally requested is approximately 13.99%. These figures represent a proposed rate increase and have not yet been approved by the ACC. For Casa Grande homeowners facing rising electricity costs and exceptionally high summer cooling loads, rooftop solar can reduce the amount of electricity purchased from APS and provide greater control over long-term household energy expenses. Actual savings depend on solar production, electricity consumption, the customer’s APS rate plan, and when energy is used.

Adding battery storage can further increase the value of a Casa Grande solar system by storing excess solar electricity produced during the day for use later in the afternoon and evening. This can be particularly useful for customers on APS time-of-use rate plans, where shifting electricity consumption away from higher-cost periods can be important. A properly designed battery system can also provide backup power for selected household loads during grid outages. With APS proposing a 16.44% residential-class revenue increase before the Arizona Corporation Commission, solar paired with battery storage gives Casa Grande homeowners another way to increase solar self-consumption, reduce dependence on utility electricity, and protect themselves against the impact of rising electricity rates.