What Are APS Off-Peak Hours in 2026 and How Can Phoenix Solar Owners Shift Load to Save?

What Are APS Off-Peak Hours in 2026?

On APS time-of-use (TOU) plans, off-peak hours are the periods when grid electricity costs less per kilowatt-hour. For summer 2026, the on-peak window on most residential TOU plans runs from 3 PM to 8 PM, Monday through Friday during the summer billing season, which typically runs May through October. Everything outside that five-hour weekday block is off-peak: mornings, late evenings, and all day on weekends and APS-recognized holidays.

That 3-to-8 PM window is the most expensive time to pull power from the grid, and it happens to be exactly when Arizona heat peaks and air conditioning runs hardest. If you are on an APS TOU plan and have not thought carefully about when your biggest loads run, you are likely paying the highest rate of the day to cool your home.

APS offers multiple rate plans and your specific on-peak and off-peak hours may differ from the standard TOU schedule. Check your current bill or log in to your APS account to confirm which plan you are on before making scheduling changes.

Why APS Off-Peak Hours Matter for Solar Homeowners

A solar homeowner on a time-of-use plan does not pay a flat per-kilowatt-hour rate all day. The price swings sharply based on when you draw from the grid. During on-peak hours, grid power costs meaningfully more than off-peak power on APS TOU plans, and the gap matters more in summer when consumption is high.

This creates a real planning challenge. Your panels produce the most power in the middle of the day, during low-rate off-peak hours. By the time rates spike at 3 PM, solar output is still reasonable but declining. By 5 or 6 PM on a summer day in Scottsdale or Gilbert, you may be running a large AC system, an electric oven, and a pool pump entirely on expensive on-peak grid power, with solar production contributing very little.

Load shifting is the strategy that changes this. Move the high-draw tasks that have flexible timing to the off-peak window before 3 PM, and your grid draw during on-peak hours falls. That directly reduces what APS charges you each month.

Which Appliances Are Worth Shifting to APS Off-Peak Hours?

Not every load is movable. Air conditioning runs when it is hot and you cannot control when people cook dinner or shower. But a surprising number of high-draw appliances have no real-time requirement.

Pool pumps are the biggest opportunity for most Phoenix-area homes with pools. Running a two-horsepower pump for eight hours a day in the on-peak window costs substantially more than running it off-peak. Shift the runtime to before 3 PM or after 8 PM and the energy cost drops without any change in pool performance. Most modern pool pump controllers let you program a schedule in a few minutes.

Dishwashers and washing machines are the next easiest wins. Neither one needs to run at a specific time. Delay-start features on most current models let you load the dishwasher after dinner and run the cycle overnight or early the next morning. A standard dishwasher draws between 1,200 and 1,800 watts per cycle; running that in the off-peak period saves a real amount compared to running it at 5 PM.

Electric water heaters respond well to time scheduling too. A standard 50-gallon tank heater draws around 4,500 watts. Heating water during the cheap morning off-peak window and insulating the tank well keeps water hot through the evening without re-energizing during peak rate hours.

EV charging is the highest-impact load to shift for homeowners who drive electric. A 48-amp Level 2 charger draws roughly 11 kilowatts. Charging every night after 8 PM, or better, between midnight and 6 AM, keeps that load entirely out of the on-peak window. Most EV home chargers have built-in scheduling; a few minutes in the app sets it permanently.

How Solar Production Changes the Off-Peak Calculation

Here is the part most APS solar homeowners miss. Because your panels generate power during the daytime off-peak hours, you are not buying much grid electricity in those hours anyway. The real benefit of load shifting is not only avoiding on-peak rates but actively using your own solar production rather than exporting it.

When you run the dishwasher at noon, you are running it on solar power you generated yourself. That power would otherwise have been exported to APS under Arizona's net billing program, which compensates exports below the retail rate. Using your own solar power is worth more per kilowatt-hour than selling it back. Shifting daytime loads into the midday solar window captures value that a simple rate-comparison calculation misses.

For a closer look at how APS calculates your solar export credit under net billing, see the post APS Summer Rates 2026: What Phoenix Solar Owners Pay During On-Peak Hours and How to Cut That Bill.

APS Off-Peak Hours 2026 and the Battery Storage Opportunity

Load shifting alone does not solve the 5 PM to 8 PM problem. AC runs hardest as the day heats up, and that heat peak often lines up exactly with the most expensive grid hours. Solar output is declining. The house needs power. This is where a home battery changes the math.

A battery charged during the midday solar peak stores excess production rather than exporting it at the net billing rate. When the clock hits 3 PM and the on-peak window opens, the battery supplies your home load instead of the grid. Depending on your home's consumption and the battery's usable capacity, you can cover most or all of the on-peak window without drawing a kilowatt-hour at peak rates.

Phoenix-area homeowners who have added battery storage to their solar systems report that a properly sized battery largely handles AC load from roughly 3 PM through 7 PM on typical summer days, with the grid only kicking in during the hottest afternoons when AC draw spikes above what the battery can deliver. The practical result is a summer APS bill that looks much closer to the off-peak rate for the whole day.

For a detailed look at how battery storage pairs with solar for APS peak charge avoidance, see Can a Home Battery Help Phoenix Homeowners Avoid APS Peak Charges in Summer 2026?.

How to Find the Best Solar Company in Phoenix for a Load-Shifting System

A solar system designed for simple grid offset is not the same as one designed for load shifting with battery storage. The panel count, the inverter type, the battery size, and the mounting orientation all change when the goal is covering a specific on-peak window rather than just reducing annual consumption.

PVS operates as a solar broker in Phoenix, which means it gathers competing bids from vetted installers rather than running its own installation crews. When you want a system sized for the 3-to-8 PM on-peak window, comparing four or five proposals from independent installers gives you something a single quote cannot: a real comparison of how each company approaches battery sizing, load analysis, and peak-hour coverage. Most homeowners who go through a broker process find at least one proposal that identifies a load-shifting opportunity the others missed.

Use the Solar Calculator to get a quick estimate of how many panels and what battery capacity your home likely needs based on your APS usage, then contact PVS to start gathering competing bids.

The Prepaid Solar Lease: Getting the 30% Discount Without the Expired Tax Credit

The federal residential solar tax credit (Section 25D) expired for owner-buyers after December 31, 2025. Homeowners who purchase a solar system in 2026 with cash or a loan do not receive a federal credit on that purchase. This is not tax advice; consult a qualified tax professional for guidance specific to your situation.

There is still a path to the equivalent of a 30% discount, and it works through the prepaid solar lease. When you prepay a lease instead of buying the system outright, the leasing company can claim the 48E commercial clean energy credit, which runs through 2027, and passes those savings to you as a reduced one-time payment. The result is a price that is roughly 30% below the cost of an equivalent purchased system.

For homeowners who looked at solar in 2024 or 2025, ran the numbers with the tax credit in mind, and stepped back when the credit expired, the prepaid lease brings that math back into range. You do not own the system, but the energy savings and the monthly bill reduction work similarly to an owned system over the lease term. A detailed year-by-year cost comparison is available in the post Prepaid Solar Lease vs Solar Loan in Phoenix: A Year-by-Year Cost Breakdown.

Getting Unbiased Solar Advice in the Phoenix Metro

Shopping for solar in the Phoenix metro means sorting through a large number of installers, each with a financial interest in recommending their own preferred system and financing structure. An advisor who works across multiple installers rather than for any single one gives you a comparison, not a pitch.

PVS is structured as a broker rather than an installer. The goal is to match your load profile, your utility territory, and your specific roof to the right system and the right installer. For homeowners specifically trying to optimize for APS off-peak hours and on-peak battery coverage, that match matters: a system that performs well in general is not the same as one sized for your specific 3-to-8 PM gap.

Whether your address falls in APS or SRP territory depends on your neighborhood, not your city. Check your electric bill to confirm your utility before comparing rate plans or installer proposals.

Frequently Asked Questions

What are APS off-peak hours in summer 2026?

On most APS residential time-of-use plans in 2026, on-peak hours run from 3 PM to 8 PM Monday through Friday during the summer billing season, typically May through October. Everything else is off-peak: mornings, evenings after 8 PM, weekends, and APS-recognized holidays. Confirm your specific plan on your APS bill or account portal.

Can shifting my pool pump to off-peak hours actually lower my APS bill?

Yes. A two-horsepower pool pump running eight hours a day during on-peak hours is one of the highest-cost loads on an APS time-of-use plan. Moving that runtime to before 3 PM or after 8 PM reduces your peak-hour grid draw without affecting pool performance. Most pool pump controllers let you set a schedule in minutes.

Does a home battery help Phoenix homeowners avoid APS on-peak charges?

A battery charged during midday solar production can power your home through the 3 PM to 8 PM on-peak window, reducing or eliminating expensive grid draws. This is especially useful in Phoenix summers, when AC demand peaks in the late afternoon just as solar output is declining. Properly sized systems can cover most or all of the on-peak window.

Did the federal solar tax credit expire for Arizona homeowners in 2026?

The Section 25D residential credit expired for owner-buyers after December 31, 2025. Homeowners buying a system in 2026 with cash or a loan do not receive it. This is not tax advice; consult a tax professional. A prepaid solar lease still delivers the equivalent of a 30% discount through the 48E commercial credit pass-through to the lessee.

What is the best way to compare solar installers in Phoenix for an APS home?

Work with an independent solar broker who gathers bids from multiple vetted installers rather than representing one company. A broker can compare how each proposal handles your APS rate plan, battery sizing, and on-peak coverage, giving you a real comparison. Most homeowners who get four or more competing bids find significant differences in how each installer approaches the load-shifting opportunity.