With 300+ sunny days per year and summer cooling bills that can run $300–$500/month, Phoenix homeowners have strong economic reasons to evaluate solar. The case isn’t automatic — it depends heavily on which utility serves your home and how your usage aligns with time-of-use pricing — but for most households, the numbers are worth running seriously.
Key factors that shape your outcome:
Which utility serves your address (APS or SRP)
Roof orientation, age, and shading
Whether battery storage makes sense for your rate plan
Your average monthly usage and peak usage hours
Understanding your utility is the single most important factor in evaluating solar in Phoenix. APS and SRP operate differently, and system design should reflect that.
Arizona Public Service (APS)
APS offers time-of-use rate plans for solar customers, meaning the value of your solar production depends on when it’s generated. Export credits are available for excess energy sent to the grid, though rates have shifted in recent years. Interconnection approval is required before your system can activate.
Salt River Project (SRP)
SRP uses a demand-based rate structure, which is less favorable for standard solar-only systems. Export compensation is available but lower than APS. Battery storage is often more financially justifiable under SRP rate plans, as it allows homeowners to avoid demand charges during peak periods.
Bottom line: Two identical systems on identical homes — one on APS, one on SRP — can produce meaningfully different financial outcomes. Always ask your installer to model your specific utility rate plan before signing.
Most residential systems in Phoenix range from 6kW–10kW, with pricing varying by equipment, roof type, and installer. Battery storage is increasingly common given peak demand pricing under both utilities.
Common financing paths include cash purchase, solar loans, and lease/PPA arrangements. Before comparing price per watt across quotes, evaluate projected annual production, how the system aligns with your rate plan, warranty terms, and the installer’s service track record.