Ember Electro-Fortification Report Explained

A new report from the energy think tank Ember argues that electro-fortification — fitting homes with rooftop solar, a battery, an electric car and an electric heating system — is the most practical way to shield UK household bills from the next oil and gas price spike. Published on 23 September 2026, The electro-fortification of Britain says modern electric homes are “ten times better protected from energy price shocks”. Here is what it actually says, what it doesn't, and what it means if you're weighing up solar.

What Ember means by electro-fortification

The idea: Ember defines it as installing renewable-powered technology at home so bills are insulated from fossil-fuel volatility. Its argument is that Britain's exposure comes mainly from total oil and gas consumption — chiefly road transport and home heating — rather than from imports alone. Every pound of petrol or gas a household stops burning is a pound that can't be repriced by a foreign crisis.

The timing is pointed. The regulator's cap rises 4% from 1 October 2026 to £1,723 for a typical dual-fuel household, which Ofgem attributes to higher wholesale gas prices — we cover what that means for solar owners in our October 2026 price cap guide.

The numbers in the report

Where Britain is now: Ember counts about 1.7 million homes with rooftop solar, and says home batteries now go into almost half of all new solar installations. More than 60 parliamentary constituencies have solar on over 10% of homes, up from five in 2022. That growth has come without a large subsidy push.

Where the headroom is: Ember points to 4.8 million homes off the gas grid and 19 million cars parked on driveways, all still reliant on pump prices. These, plus homes that already have solar, are its “quick wins” over the next decade, and it recommends a place-based approach that plays to local strengths and unblocks local barriers.

Monthly pace: coverage of the report cites roughly 15,000 homes installing rooftop solar, 6,000 installing a battery and 48,000 electric cars being bought every month, with battery uptake doubling each year for more than three years. Press coverage also reports that rooftop solar can cut annual EV charging costs by over £500 a household, and that Wales has the highest domestic solar, battery and heat pump uptake — seven of the ten fastest-growing solar constituencies. Those last two figures are reported in the coverage rather than in the Ember article we could read, so treat them as second-hand.

How to read “ten times better protected”

The ten-times figure is a headline claim, and the published summary doesn't set out how it is calculated. It is a measure of reduced exposure to fossil-fuel price swings, not a promise that your bill falls tenfold. It also isn't a savings figure: the piece gives no per-technology savings. For a benchmark of actual money, the Climate Change Committee said in June 2026 that a typical household combining an EV, a heat pump, solar panels and a time-of-use tariff could save about £1,200 a year, and around £1,900 for rural homes. The CCC also found that households on gas boilers and petrol cars have seen bill rises nearly four times higher than those with heat pumps and EVs since the Middle East conflict began.

What it means if you're considering solar

Solar plus a battery is the entry point. These two are the pieces already going in at scale. Our are solar batteries worth it guide shows when storage pays back, and the record 2026 installation figures show how many households are already doing it.

An EV multiplies the value of a roof. Charging from your own panels is where the £500-plus saving comes from; see how big a solar system you need to charge an EV.

Heat is the hard part. Heat pump installations grew only 7% in 2026 according to the CCC, against 56% the year before, so this is the slowest leg of the strategy. Our heat pump vs gas boiler comparison covers running costs at current prices.

As always, get quotes from at least two MCS-certified installers based on your own bills and roof, rather than relying on a headline number from a think tank report.