IEA: We've Entered the Age of Electricity — What It Means for You

The International Energy Agency (IEA) just made it official: the world has entered what it calls the "Age of Electricity." In its latest global energy review, the agency reports that solar photovoltaics and battery storage are now the fastest-growing sources of new energy capacity on the planet — and, for the first time, they are displacing fossil generation outright rather than simply adding to the grid. (IEA, 2025)

For American homeowners, this isn't an abstract headline. It's a signal about where electricity prices, utility incentives, and home technology are heading over the next five years. And it's a quiet reminder that the decisions you make about your roof and your garage today will shape your energy bill for the next two decades.

What the IEA Actually Said

The IEA's 2025 Global Energy Review highlights three findings that should catch every homeowner's attention:

• Solar added more new capacity than any other energy source in 2024 — more than coal, natural gas, wind, and nuclear combined. (IEA Renewables 2024)
• Global battery storage deployments roughly doubled year-over-year, led by utility-scale installations in China, the U.S., and Europe.
• Electricity demand is growing about twice as fast as total energy demand, driven by EVs, data centers, heat pumps, and AI.

In plain English: the world is electrifying everything it can, and solar plus batteries are winning the race to supply that electricity. The U.S. Energy Information Administration (EIA) echoes this trend — solar is projected to account for more than half of all new U.S. utility-scale generation capacity added in 2025. (EIA, 2025)

Why This Matters for Your Power Bill

When utilities add cheap solar and storage at scale, the wholesale cost of electricity during sunny hours drops. But retail rates — the price you pay — don't always fall in lockstep. In fact, Lawrence Berkeley National Laboratory found that average U.S. residential electricity rates rose roughly 13% between 2021 and 2024, even as wholesale solar costs declined. (Berkeley Lab)

Why the disconnect? Grid infrastructure, transmission upgrades, wildfire hardening, and extreme-weather recovery are all being rolled into rate base. Translation: even as clean power gets cheaper to produce, the delivery charge on your bill keeps climbing.

The homeowners who get ahead of this trend are the ones who pair on-site solar with battery storage — effectively locking in their generation cost and reducing their exposure to grid-delivery fees.

The Solar + Storage Playbook for 2026

There's been one major policy shift homeowners need to understand: the federal 30% Residential Clean Energy Credit (ITC) for purchased systems expired at the end of 2025. If you buy a system outright in 2026, the federal tax credit is no longer available on a new purchase.

However, third-party-owned systems — solar leases and Power Purchase Agreements (PPAs) — still qualify under the commercial Investment Tax Credit (Section 48), and reputable installers pass that savings through as a lower monthly rate. The Solar Energy Industries Association (SEIA) reports that leased and PPA systems now make up roughly 40% of new residential installs as a result. (SEIA, 2025)

Three Paths Most Homeowners Are Taking Right Now

1. Lease or PPA with $0 down. Commercial ITC still applies; installer handles permitting, installation, and monitoring. Best for homeowners who want hassle-free monthly savings.
2. Cash purchase without federal credit. Still pencils out in high-rate states (CA, HI, MA, NY) because of state rebates, net metering, and SRECs. EnergySage pegs the average payback at 9–12 years in these markets. (EnergySage, 2025)
3. Battery-first retrofits. With time-of-use rates expanding (the CPUC approved new TOU schedules for PG&E and SCE in late 2025), a home battery can pay for itself just by shifting consumption out of peak windows. (CPUC)

The Battery Boom Is Real — And It's Local

One of the most striking numbers in the IEA report: global battery manufacturing capacity grew more than 50% in 2024 alone. That means batteries are getting cheaper, faster. BloombergNEF pegs lithium-ion pack prices at about $115/kWh today, down from $1,355/kWh in 2010 — a 91% decline.

For a homeowner, that trend is showing up as:

• More competitive pricing on Tesla Powerwall 3, Enphase IQ 5P, Franklin WH, and SunPower SunVault.
• Expanded state-level battery rebates — California's SGIP, Massachusetts' ConnectedSolutions, and new programs in CO, NY, and MD.
• Utilities paying you to enroll your battery in a Virtual Power Plant (VPP) — typically $1–$2 per kWh dispatched during peak events.

How to Find Out What You Qualify For (in 60 Seconds)

National averages are useful for context, but your actual savings depend on three zip-code-specific factors: your utility's rate, your state's net-metering rules, and the local rebates stacked on top. That's exactly why we built the EnergyScout Incentives Search: drop in your zip code and see every federal, state, and utility program you qualify for — no email gate, no sales call.

Pair that with our free Solar Assessment Tool, which uses NREL's PVWatts model to estimate your system size, annual production, and payback based on your actual roof. It takes about 90 seconds, and you'll see whether a lease, PPA, or cash purchase makes more sense for your situation.

What the IEA Report Means for the Installer Market

The National Renewable Energy Laboratory (NREL) expects U.S. residential solar installs to grow another 8–12% annually through 2028, even after the federal ITC change. (NREL) That's a double-edged sword: more demand means more local installers to choose from — but it also means more out-of-state lead resellers and high-pressure sales operations flooding the market.

We recommend three filters when picking a contractor:

1. Local operations, not a call center. Look for a physical address in your state.
2. NABCEP-certified installers on the crew. This is the industry gold standard.
3. Written production guarantee. If they won't stand behind the kilowatt-hours, walk away.

Our Provider Directory only lists installers who meet those criteria in your area.

The Bottom Line

The IEA isn't known for dramatic language — so when it says the world has entered the "Age of Electricity," it's telling us something important: the economic, industrial, and technological momentum behind clean electricity is now unstoppable. Solar plus storage has crossed from "alternative" to "default."

For homeowners, that means two things. First, your neighbors are going to install solar and batteries whether or not you do — and the ones who move early will lock in today's equipment pricing and today's net-metering rules before utilities roll them back further. Second, the tools to do it smartly have never been more accessible.

Ready to see what your roof could do in the Age of Electricity? Start with a free, no-email Solar Assessment at energyscout.org — we'll show you the numbers before any installer ever calls.