Energy

Storage Behind Your Meter Skips the Grid Queue

Base Power raised 1 billion dollars at a 13 billion valuation to install home batteries in two US states. Europe's residential battery market shrank 6 percent. The difference is not hardware, it is who owns the box.

EnergyBy Servola Tech Desk2026-08-045 min read

AI-assisted, edited by humans. | Editor-in-Chief: Leon Soliman | Editorial standards

Storage Behind Your Meter Skips the Grid Queue

Key takeaways

Base Power is installing about 8 megawatt hours of battery storage a day in two US states, which annualises to roughly 2.9 gigawatt hours, against a European Union residential market of 9.8 gigawatt hours a year that is shrinking, so one company is running at about 30 percent of the EU's entire home-battery volume.
The EU installed a record 27.1 gigawatt hours of batteries in 2025, up 45 percent, but the residential share fell 6 percent to 9.8 gigawatt hours, the second consecutive annual decline, which SolarPower Europe attributes to lower electricity prices and reduced support schemes.
Base Power keeps ownership of the battery and sells a subscription: 695 dollars to install and 19 dollars a month in its Houston example. Europe mostly sells the same hardware to the household as a capital purchase, which is why the segment collapses when subsidies end.
Behind-the-meter storage does not join the transmission interconnection queue, so it adds dispatchable capacity on a timescale of weeks while grid-scale projects wait years for a connection date.
Before your next site review, ask your national energy regulator's rules on one specific point: whether storage on your own premises can be aggregated and paid for in the balancing market, because in Europe that permission, not the hardware, is the binding constraint.

What Base Power announced on 3 August

On 3 August Zach Dell's company announced a 1 billion dollar Series D at a 13 billion dollar post-money valuation, and in the same release launched Base Core, a home battery now in production at Base Factory 1 in Austin. It is the company's second billion-dollar round in ten months and takes total funding past 2.5 billion dollars. Ribbit, Addition, Valor Equity Partners and JPMorganChase's Strategic Investment Group led, with Altimeter, D1 Capital Partners, Sands Capital, Coatue, Layer Global and Energy Impact Partners joining, and existing backers including Thrive Capital, Andreessen Horowitz, Lightspeed, Trust Ventures and CapitalG re-investing.

The hardware is deliberately oversized for a house. Base Core holds 39.2 kilowatt hours in one unit or 78.4 across two, uses lithium iron phosphate cells, claims up to 36 hours of backup from a single unit and up to 72 from a pair at reduced consumption, installs in under an hour, switches over in 50 milliseconds, carries an IP67 rating and is specified from minus 30 to plus 50 degrees Celsius. The company reports more than 500 megawatt hours installed and more than 200 megawatts committed to utility programmes with El Paso Electric, Austin Energy and CoServ, in Texas and Illinois only.

Two American states are installing what a continent is not

Base Power installs roughly 100 batteries a day, about 8 megawatt hours, and says it intends to double that by the end of the year. Annualise the current rate and it is about 2.9 gigawatt hours a year; annualise the stated goal and it is about 5.8. Now set that against SolarPower Europe's EU Battery Storage Market Review 2025, published on 28 January 2026: the residential segment across all 27 member states came to 9.8 gigawatt hours in 2025. One company operating in two American states is running at roughly 30 percent of the European Union's entire annual home-battery volume, and plans to reach about 60 percent.

The direction of travel is the harder part. The EU had a record year overall, 27.1 gigawatt hours installed and up 45 percent, with cumulative capacity reaching 77.3 gigawatt hours, a tenfold rise from 7.8 gigawatt hours in 2021. But utility-scale took 55 percent of the new capacity while residential fell 6 percent, its second consecutive annual decline. The report attributes the fall to lower electricity prices and reduced support schemes. Meanwhile the same report states the EU needs to repeat that tenfold increase to around 750 gigawatt hours by the end of the decade.

The difference is who owns the box

Read those two facts together and the divergence is not about cells, climate or engineering. Base Power does not sell you a battery. It retains ownership, charges 695 dollars to install and 19 dollars a month on the Houston plan it publishes, and bundles the electricity at 13.1 cents per kilowatt hour. The household buys backup power and a fixed rate. The company keeps a fleet asset it can dispatch when wholesale prices spike, and that dispatch revenue is what pays for hardware a household would not buy at cost.

Europe, for the most part, sells the same box to the householder as a capital purchase justified by avoided consumption. That business case is a direct function of the spread between retail power prices and subsidy levels, which is precisely why the segment contracts when both move the wrong way. It is a financing structure that makes the customer carry the asset and collect none of the flexibility value. Nothing in the SolarPower Europe numbers suggests Europeans stopped wanting storage. The numbers suggest the product on offer stopped making arithmetic sense.

Why this matters at your next site review

Here is the part that should change a decision rather than an opinion. Capacity behind your own meter does not enter the transmission interconnection queue. It still needs a distribution connection and it still answers to metering rules, but it does not wait behind gigawatts of grid-scale applications for a connection date. That makes on-site storage one of the few electrical assets an operator can still add on a timescale of weeks, at a moment when large new loads are being told to wait years, and when at least one large grid operator has paused approvals for new data centre connections entirely pending an audit.

So the question to put on the agenda is narrow and answerable. Ask whether storage installed on your own premises can be aggregated into a portfolio and paid for in your national balancing or capacity market, and who is allowed to hold the meter that proves it. Your national regulator sets that answer, whether that is the Bundesnetzagentur, the CNMC, ARERA, the CRE, the ACM, Forsyningstilsynet, Energimarknadsinspektionen, ERSE or URE. In the United States a subscription model turned home batteries into a grid asset. In Europe the same hardware sits idle in the same garages because nobody is permitted to pay it.

Frequently asked questions

Is a 39.2 kilowatt hour battery relevant to a business, or only to a house?

The unit size is residential but the fleet logic is not. A workshop, a clinic, a small hotel or a depot has a load profile in the same range as a large house, and the same arithmetic applies: the asset earns its keep from dispatch and price arbitrage, not from avoided consumption alone. The lesson to import is the ownership structure, not the exact box.

Does behind-the-meter storage really avoid interconnection delays?

It avoids the transmission interconnection queue, which is where the multi-year waits sit. It does not avoid distribution network connection requirements, permits, or metering approval, and those can still take months. The distinction matters because the queue is what currently makes new grid-scale capacity unschedulable, and behind-the-meter capacity is not in it.

Why did European residential storage fall if electricity is still expensive?

SolarPower Europe attributes the 6 percent decline to lower electricity prices and reduced support schemes. Both cut the same way: when the retail price you avoid drops and the grant that closed the gap is withdrawn, a purchase justified purely on avoided consumption stops paying back within a tolerable period. The hardware did not get worse, the business case did.

Europe does not have a battery shortage. It has 9.8 gigawatt hours a year of residential storage going in, falling, while the same report says the bloc needs 750 gigawatt hours by 2030. The gap will not be closed by better cells or larger subsidies. It will be closed when someone is allowed to own the battery in your garage and get paid for what it does for the grid.

Base PowerHome batteryVirtual power plantSolarPower EuropeGrid interconnectionDemand flexibilityEnergy storage

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