Utility Rates, Solar, and Storage: What Homeowners Need to Know

If you've opened your electric bill and wondered why it keeps creeping higher even when your usage looks the same, you're not imagining it. Utilities across the country are restructuring how they charge customers. Here's what's driving the increases, how rate plans work, and how solar plus battery storage can protect your wallet.

Why do electricity costs keep rising?

Electricity billing should be simple: you use power and you pay for it. That's not the reality today. Utilities are raising fees, restructuring plans, and facing enormous demand growth. A big driver is the rapid expansion of artificial intelligence and the data centers powering it. Some new centers are projected to consume up to 10 gigawatts each, more than double the size of Arizona's Palo Verde Nuclear Generating Station, which tops out at 3.8 GW.

As demand grows and supply struggles to keep pace, prices rise. Read more about data centers and electric bills in Arizona, Texas, and Nevada.

How have utility rate plans changed?

What is time-of-use billing?

Many utilities now charge based on when you use electricity, not just how much. Time-of-use (TOU) plans make late afternoon and evening, when families cook, run the A/C, and plug in devices, the most expensive time of day. Even if your total usage hasn't changed, using more power at the wrong time can raise your bill.

What is net billing?

A decade ago, most utilities gave solar customers full retail credit for energy exported to the grid. Today, many have shifted to net billing, where export credits are worth significantly less. The takeaway: solar systems need to be designed not only for production but also for the rules of your local utility.

How do APS and SRP rates affect solar in Arizona?

APS (Arizona Public Service)

APS customers are almost always on time-of-use plans, with the steepest rates between 4 PM and 7 PM, just as the sun sets. Without storage, that means buying high-cost peak power every evening. Pairing solar with a battery lets you:

• Store excess daytime solar power.
• Charge batteries with low-cost off-peak energy.
• Discharge in the evening to avoid premium rates.

SRP (Salt River Project)

SRP applies demand charges: fees based on how much power you pull from the grid at once during peak hours. Even if your monthly use is modest, one big spike can raise your bill. Batteries smooth those peaks and can reduce or eliminate demand charges, making them one of the most effective tools for SRP's rate structure.

What are virtual power plants?

APS and SRP are both exploring virtual power plant (VPP) programs. With a VPP, homeowners can send stored energy to the grid during high-demand events, often earning more than standard solar export rates.

How should Texans choose a solar plan?

Texas runs on a deregulated grid, so homeowners choose from dozens of retail energy providers. Some offer strong solar buyback programs, occasionally even at retail rates during certain hours. The best approach depends on how much solar your roof can support and what share of your power still needs to come from the grid.

A well-designed Texas system usually aims to match your annual usage as closely as possible. Even if you can't cover 100%, you can still cut costs significantly, and a battery adds resilience against outages. See is solar worth it in Texas.

Key takeaways

• Solar is no longer one-size-fits-all. Savings depend on how well your system fits your utility's rate structure, not just how much sun your roof gets.
• In Arizona, batteries are critical for handling peak pricing and demand charges.
• In Texas, the right system paired with the right retail provider unlocks the best savings.
• Everywhere, solar plus storage delivers long-term cost protection and peace of mind.

Get a system designed for your utility's rates →

Frequently asked questions

Why is my electric bill going up if my usage hasn't changed?

Utilities are adding fees and moving customers to time-of-use plans, so when you use power matters as much as how much. Demand growth from data centers is also pushing prices up. If you already have solar, see why your bill may still be high with solar.

Do I need a battery with solar on APS?

It helps a lot. APS peak rates run 4 to 7 PM, after solar production drops, so a battery lets you use stored solar instead of buying expensive peak power.

How do batteries help with SRP demand charges?

SRP bills partly on your biggest spike in grid use during peak hours. A battery covers those spikes so you pull less from the grid at once, which can reduce or eliminate demand charges.