The home energy stack of 2030: How Next Optimise is building the foundation for your fully automated home energy system.

Summary.

• The UK home energy landscape is shifting from passive consumption to active, automated participation using solar, batteries, and electric vehicles (EVs).

• Many homes have these assets, but they often operate independently, leading to inefficiency; the solution is coordination via software, not just more hardware.

• Next Optimise offers a dynamic tariff and automation platform that uses wholesale market signals to manage home energy assets efficiently.

• By connecting your home battery and other assets to an intelligent, automated system, you can reduce energy costs and maximise the value of your hardware.

Ten years ago, the average UK home was a passive consumer of electricity. Power came in through one meter, an analogue dial spun, and an often estimated bill arrived once a quarter. The only real choice was the supplier name on the top of it. Generation happened somewhere else, the grid did its job in the background, and the role of the household was to use what it needed and pay at the end.

That model is dissolving. Not because anyone decided to dismantle it, but because the kit inside the average home keeps getting more capable. Solar on the roof, a battery on the wall, an EV on the drive, a heat pump in place of an old boiler, a smart meter measuring the imported and exported energy from the property. Each piece is, on its own, a useful upgrade. Stacked together, they're something else entirely. They turn the home from a passive endpoint into an active participant in the electricity system.

The interesting question for the rest of this decade isn't whether more of this hardware will be installed. It's whether the hardware ends up coordinated, or sitting next to each other doing its own thing. A battery that knows nothing about the EV charger. An EV charger that knows nothing about the heat pump. A heat pump that knows nothing about wholesale prices. That's the situation in most homes today, and it's where a lot of value is leaking.

Next Optimise is built on the bet that this gets solved by software, not by more hardware. A tariff wired into a wholesale market signal, and an automation layer that uses that signal to coordinate whatever flexible load and storage the home already has.

The home energy stack is already growing fast.

The UK home energy stack has gone from a curiosity to a category in a handful of years. More than 48,000 MCS-certified domestic batteries were installed in the 12 months to March 2025 alone, with most in the 1 to 11 kWh range that suits a typical home, and the install rate has been rising year on year1. Those batteries are joining a much larger and longer-established base of solar PV, a growing EV fleet, and an ongoing smart meter rollout.

The conversation in 2026 isn't whether households will have flexible assets. It's what they'll do with them.

Here’s the friction: most home energy devices are configured independently. Your battery runs on a basic commissioning schedule, your EV charger uses its own off-peak window, and your heat pump relies on its own internal thermostat, none of them talking to each other. In a world of flat rates or static time-of-use tariffs, that isolated setup was passable because energy prices remained predictable.

That model is rapidly becoming outdated. As dynamic electricity prices fluctuate throughout the day, shifting with cheap solar-soaked afternoons and winter evening peaks, coordinating these assets isn't just a bonus; it’s how households unlock significantly better financial and operational outcomes.

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Why coordination is the missing layer.

If you've got a battery, solar, and an EV today, you already have most of the hardware that matters. The bit that's almost certainly underperforming is the coordination between them.

Think about what a battery on a flat tariff actually does. It charges from solar when the sun's up, discharges into the house in the evening, and that's roughly it. On a cloudy week in February, the battery sits at low state of charge for days. The only signal it might have to react to is a fixed off-peak window set when it was installed.

Instead, you could put the same battery on a tariff that exposes you to actual wholesale prices, half hour by half hour, with software making the decisions. On the same February day, the battery charges at 3am because that's the cheapest half-hour of the night, holds for the morning peak, tops up again at lunch because wind output has pushed prices low, then discharges hard from 4pm to 7pm into the evening peak. The hardware is identical. The behaviour is completely different. The result is a battery that earns and saves a lot more across the year.

That's the gap automation closes. Once you've closed it for the battery, you can start closing it for everything else. The EV that used to charge between 12 and 5am every night, regardless of whether that night's prices were actually low, can be told to charge in the genuinely cheapest hours. The heat pump's hot water cylinder, an underrated thermal store sitting in millions of UK homes, can run when electricity is cheap and coast when it isn't. Discretionary loads like the dishwasher and tumble dryer can wait for a good moment instead of running immediately.

None of that is theoretical. It's the same playbook running at scale in Australia, where the SmartShift technology that powers Next Optimise has been operating for years. UK households are starting from broadly the same hardware base. The difference is whether the tariff and the software are in place to let it work.

Where Next Optimise fits in the stack.

Next Optimise is our dynamic import and export tariff for households with a home battery. It tracks wholesale electricity prices in 30-minute settlement periods, and pairs that with SmartShift, the automation platform Amber Electric has been running at scale in Australia. The battery charges when wholesale prices are low and discharges when they're high. The algorithm reads the market in the background. You don't have to.

The battery storage is the foundation because it's the most flexible asset in the home. It can charge from the grid, charge from solar, discharge into the house, or export to the grid, and it can switch direction within seconds. Solar generates when it generates. A heat pump heats when the house needs heat. An EV charges when it's plugged in. A battery is the one piece of the stack that can move energy across hours, across the day, across price signals, in whatever direction the maths says is most valuable. Get the battery working properly and everything else gets easier to layer on top.

For households also with a Tesla EV, that layering is already part of the product. You can schedule and charge your EV through the Next Optimise app on all models except pre-2021 Model S and X, putting the car into the same wholesale-aware decision-making the battery is using. That's the second piece of the stack joining the orchestration. The pattern repeats outward from there.

As an indicative figure, the Next Optimise product page shows that a household with 4,200 kWh annual consumption, 4 kW of solar, and a 5 kWh battery, on average import and export rates of around 10p and 15p per kWh, would see an illustrative annual energy cost of around £166. That's based on a specific set of assumptions feeding into a simulation, not a guaranteed outcome. What any particular home sees depends on its usage, its hardware, and how prices move.

Next Optimise works with a growing list of home battery and solar inverter setups. Right now that includes all GivEnergy inverters and batteries, Tesla Powerwall, the Fox ESS H1-G2, KH and H3 Smart Range (the H1-G1 isn't compatible), the Alpha AL series, and Sigenergy systems with a Sigen Gateway or Sigen Sensor. The system spends about 30 days learning your home's specific patterns before it fully takes over, and you can switch between auto and manual mode whenever you want.

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What the stack looks like by the end of the decade.

The exact shape of the home energy stack by 2030 depends on policy, prices, supply chains, and a hundred other variables. But the direction of the principle is clearer than the precise numbers. The stack gets larger, more capable, and more valuable, and the gap between coordinated and uncoordinated homes gets wider.

The market is changing alongside it. The Demand Flexibility Service has already shown that domestic and small-scale assets can participate in system balancing, with NESO running the scheme and households being paid to shift consumption away from peak periods when the system is tight2. Schemes like that have introduced a lot of UK households to the idea that their flexibility has a market value, and they're a foundation the next generation of automated flexibility builds on.

By 2030, the stack in a typical participating home looks something like this. Solar on the roof, doing what it always has. A battery on the wall, charging and discharging on a wholesale-aware schedule. An EV plugged in most evenings, charging in the genuinely cheapest hours rather than a generic off-peak window. A heat pump using its hot water cylinder as a flexible thermal store. And one piece of software, tied to one tariff, making the calls in the background so the household doesn't have to.

The foundation question.

A battery matters in this picture not because it's the biggest piece of the stack, but because it's the piece that makes the rest of the stack work properly.

A house with solar but no battery can only consume its own generation in real time. Anything in surplus gets exported, often at a lower price than it could have been worth a few hours later. A house with an EV but no battery can charge cheaply overnight, but can't do much about the evening peak when most homes are using the most electricity. A house with a heat pump but no battery is reliant on the heat pump's own flexibility, which is real but limited by the cylinder size and the comfort tolerance of whoever's home.

A battery is the keystone. It can absorb excess solar, soak up cheap grid power, run the house through the expensive hours, and earn from export when prices spike. Put it on a wholesale-aware tariff with proper automation, and it stops being a backup device and becomes the active centre of the stack. Everything else then becomes a question of layering. EV scheduling, hot water cylinder timing, discretionary loads. Each new piece slots into the same optimisation logic the battery is already using, and the value compounds.

As the energy system evolves, the homes that get the most out of it tend to be the ones whose hardware is already pulling its weight. If you've got a battery on the wall, that work is already half done. The other half is software, a market-following tariff, and the willingness to let the algorithm do its job.

Ready to put the foundation in place? Next Optimise is open to E.ON Next customers with solar panels and a compatible home battery already installed. See if your home is eligible.

• 1. Department for Energy Security and Net Zero, MCS certified domestic battery installation statistics, April 2024 to March 2025. Published 29 May 2025. https://www.gov.uk/government/statistics/mcs-certified-domestic-battery-installation-statistics-april-2024-to-march-2025
• 2. National Energy System Operator (NESO), Demand Flexibility Service. https://www.neso.energy/industry-information/balancing-services/demand-flexibility-service-dfs