Nogales, Arizona is a historic border community surrounded by the rolling hills and rugged mountains of Santa Cruz County, with residential neighborhoods climbing the slopes above the city’s central valley. Homes range from established properties near downtown to hillside residences and larger parcels toward the community’s edges. Nogales sits at a higher elevation than Tucson and Phoenix, but its abundant Southern Arizona sunshine and warm-weather cooling demands still make household electricity costs an important consideration for homeowners evaluating residential solar.

The primary electric utility serving Nogales is UniSource Energy Services (UES). UniSource residential customers experienced an estimated approximately 11% average bill increase when new electric rates approved by the Arizona Corporation Commission took effect in September 2024. UniSource has since returned to the Arizona Corporation Commission (ACC) with another rate case, filed in June 2025. Under the current proposal, the utility estimates that an average residential electric bill would increase by approximately 14% if the requested rates are approved. That 14% figure is a proposed increase, not an approved rate hike. For Nogales homeowners facing higher utility costs, rooftop solar can reduce the amount of electricity purchased from UniSource and provide greater control over exposure to future electricity-rate increases. Actual savings depend on solar production, household consumption, the applicable utility rate plan, and when electricity is used.

Adding battery storage can help Nogales homeowners use more of the solar electricity their systems generate by storing excess daytime production for use during the evening or other periods when the home would otherwise draw electricity from UniSource. Batteries can increase solar self-consumption, reduce reliance on grid electricity, and, when properly configured, provide backup power for selected essential household loads during an outage. With UniSource residential bills having risen about 11% under the previous rate case and another roughly 14% increase currently proposed before the ACC, pairing solar panels with battery storage can provide Nogales homeowners with greater control over rising electricity expenses while adding valuable energy independence and backup-power capability.