Has your electric bill felt higher lately? You're not imagining it.
Three things are changing at once for homeowners across North Carolina and South Carolina: rates are climbing, the way you're billed is shifting, and the grid itself is under more pressure than it has been in decades.
Any one of these on its own would be worth a homeowner's attention. Together, they're the reason battery storage is having a moment that has nothing to do with the next hurricane.
What's Driving Electricity Rates Higher
Rate increases aren't new, but the scale of this one is hard to ignore.
Duke Energy recently asked regulators for one of the largest rate increases in its history at 18%. After months of public hearings, that request was negotiated down to a 15% multi-year increase phasing in through 2027 and 2028.
And Duke isn't the only one. Dominion Energy in South Carolina settled on its own rate increase in 2026, followed by Santee Cooper proposing its own multi-year increase for 2027 and 2028.
The reasons show up again and again across every filing: aging infrastructure, extreme weather costs, and a customer base that's growing faster than expected.
Duke Energy's own CEO has said electricity demand is now growing at roughly ten times the pace utilities planned for over the past three decades, with data centers responsible for more than 85% of the load growth expected from new economic development projects.
But, the demand of AI data centers doesn't stay inside their fence lines. While proposed policy changes are being considered, everyone currently splits the cost of new power plants and grid upgrades--homeowners included.
Rate increases in the Carolinas aren't just about fuel costs anymore. A meaningful share is now tied to keeping up with data center growth, and homeowners are picking up part of that tab.
The Shift to Time-of-Use Rates
Rates going up is only half the story. The other half is how you get charged.
A traditional rate charges the same price no matter the hour. A time-of-use (TOU) rate doesn't. It charges more when the grid is under the most demand and less when it isn't, which sounds reasonable enough on paper. In practice, it means when you run your dryer matters almost as much as how often you run it.
This used to be a mostly-Duke-Energy conversation. Not anymore.
- Brunswick Electric Membership Corporation (BEMC), which serves much of the Cape Fear region, moved residential members to a mandatory time-based rate in November 2025, with peak windows that shift by season.
- Horry Electric Cooperative and Santee Cooper, covering Myrtle Beach and the Grand Strand, have been running seasonal peak pricing since 2024. Most members have come out ahead, though not everyone has, and both utilities have been upfront about that.
- Dominion Energy South Carolina already requires TOU billing for solar customers and has proposed new peak-hour windows for 2026.
Translation: if you've never lived under a TOU or peak pricing rate schedule, running the dryer, charging the EV, or cranking the AC during a summer weekday afternoon can cost noticeably more than doing the exact same thing after 9 p.m.
Whichever utility is on your bill right now, there's a good chance a fixed per-kWh rate is already gone or on its way out.
A Grid Under More Strain
There's also the reliability question.
Two things are converging on the same grid at the same time: (1) data centers are pulling far more power, far faster, than anyone planned for a few years ago, and (2) a lot of the infrastructure carrying that power is decades old. So old, for instance, that legacy systems within the Industrial Control Systems (which balance loads and divert power among parts of the grid seeing sudden demand surges or power outages) were not designed to connect to networks, much less the internet.
The truth is that our grid was simply built for a very different pattern of usage and a milder run of weather than the region has seen lately. Every winter cold snap, summer heat wave, and hurricane pushes the grid closer to its limit. When that happens, utilities either buy emergency power from neighboring grids at a premium or ask customers to cut back. Either way, someone pays for it.
Now, this doesn't mean the lights are about to go out any day now. Utilities plan hard to avoid that. However, it does mean the margin for error is thinner than it used to be, and homeowners with their own way to store power have more room to breathe when the grid is stretched thin.
Why a Battery Answers All Three at Once
Here's the part that's easy to miss: a battery isn't a response to just one of these trends. It genuinely helps with all three.
Rising rates? Store the energy your solar panels produce and use it when the sun isn't shining instead of paying whatever the meter says in the moment.
Time-of-use pricing? Shift when you draw power from the grid, which is exactly what these rates are built to reward.
A shakier grid? Keep your own reserve of power on hand for the hours, or days, when the utility can't guarantee smooth service.
For years, the battery pitch was almost entirely about resilience: keep the lights on during the storm. That's still true, and still worth a lot on the coast. But it's not the whole pitch anymore. A battery has quietly become a financial tool as much as an insurance policy.
How a Battery Performs Under Time-of-Use Rates
While every utility's peak hours vary, say yours run from 3 to 6 pm on summer weekdays. Without a battery, your AC, your fridge...everything draws straight from the grid during that window at full price, with no way around it.
With a battery, that afternoon window utilizes your stored midday production that you'd otherwise have exported for pennies. The hours that cost the most under a time-of-use rate are the hours your battery is working hardest for you.
One caveat worth being direct about: this only works if the system is actually configured around your rate schedule. A battery installed without that in mind won't deliver these results on its own. It's worth a real conversation with an energy advisor rather than an assumption that any battery, installed any way, automatically optimizes for your bill.
Get Paid to Help the Grid: Virtual Power Plants
Not to mention, there's another way batteries can further increase homeowners' savings: by acting as virtual power plants, or VPPs.
A VPP is a network of home batteries a utility can draw on, in small amounts, during demand peaks. Instead of building a power plant that only runs a handful of hours a year, the utility leans on thousands of home batteries to each chip in a little.
Duke Energy already runs VPP programs across North Carolina and South Carolina under names like Power Manager and EnergyWise Home. Enroll an eligible battery, and Duke Energy can draw on it for about 30-36 times each year in exchange for a recurring bill credit of up to about $92 a month, depending on the program and battery size.
There are real trade-offs, including how often the utility can access your battery and how much backup capacity you want to keep reserved for yourself. But for anyone weighing the cost of a battery system, VPP enrollment is a genuine way to offset that cost over time, not just a nice-to-have.
Key takeaway: a battery doesn't just protect against rising costs. In many cases, it can actively earn you something for helping the grid during the hours it needs the help most.
Is a Battery Right for Your Home?
A few signals worth paying attention to:
- You're on, or about to move to, a time-of-use rate
- Your household runs a fair amount of electricity in the evening, especially during peak windows
- You've lost power during storms before and want backup on hand
- You already have solar and want to make better use of what it produces
- Earning ongoing bill credits through a VPP program sounds appealing
Every home is different. The right size and setup depends on your actual usage, your specific rate structure, and what you're really after--whether that's savings, resilience, or both. A personalized look at your usage data is the most reliable way to find out what a battery would actually do for your bill.
The Bottom Line
Rates are climbing, billing is shifting to time-of-use, and the grid is carrying more than it was built for. A battery is one of the few tools that helps with all three at once, and depending on your utility, it might also pay you back for the privilege.
The right next step depends on where you're starting from.