Start with your power company
In Arizona, the sun is not the hard part. The hard part is the bill. A home with APS, SRP, TEP, or another utility may get a different answer from the same solar system. That is why a solar quote should not start with panel count. It should start with your power company and your rate plan. Ask the salesperson to show the plan name on the quote. Ask how much power you buy from the grid. Ask what happens when your panels make more power than your home is using. If the quote cannot answer those simple questions, the savings number is only a guess.
Extra solar is not always worth full price
Many homeowners think every extra solar unit has the same value. That is often not true. Power you use in your home right away can lower the power you buy from the utility. Power you send out to the grid may get a smaller credit. That means a huge system can look good on paper but give less value than expected. The best size is not always the biggest size. The best size is the one that fits your roof, your bill, and the way your family uses power.
SRP customers need one more check
SRP customers should ask about demand charges and solar price plans. A demand charge can be based on your highest power use during a short time. That can make a big difference. For example, running the air conditioner, oven, dryer, and pool pump at the same time may raise the bill. Solar can help, but the home still needs a plan for evening use. A battery may help some families. A timer for big appliances may help too. The quote should show this in plain words.
What your quote should show
A good Arizona quote should show five things. It should show your current bill plan. It should show how much solar you will use at home. It should show how much solar may go back to the grid. It should show the credit rate for extra solar. It should show the price with no federal homeowner tax credit for 2026 projects. If a battery is included, the quote should also say when the battery charges and when it powers the home. This makes the quote easier to trust.
Easy questions to ask
Ask these before you sign. What utility plan did you use? What happens to extra solar power? Will I still have a monthly bill? Does a battery help my bill, my backup power, or both? What changes if my family buys an electric car? Who fills out the utility forms? These are normal questions. A good installer should answer them without making you feel rushed.
Why this matters for your kitchen-table math
When you look at a solar quote, do not start with the big savings number. Start with one month of your bill. Ask how the bill changes in July, August, and September. Ask what happens in winter. Ask if the system makes more power than you use during the day. A simple month-by-month view is easier to trust than one big twenty-five-year promise. You should be able to point to each line and understand it.
