Your Next Car Might Run Your House: How EVs, Solar and V2H Are Rewiring the Home

Picture the next blackout.

The street goes dark. The fridge hums to a stop. Your neighbours dig out candles and check when the power company says it'll be back.

Your lights stay on. So does the heat pump, the wifi, the oven. Not because you bought a generator. Because your car is parked in the driveway, plugged in, quietly running the house.

That's not a concept video. The technology exists, it's shipping, and it's about to change what people expect from both their car and their home.

The simple idea behind a big shift

For most of automotive history, a car was a thing that consumed energy. You put fuel in, it burned fuel, the end.

An electric vehicle holds energy instead of burning it, and increasingly, that energy can flow both ways. This is vehicle-to-home, or V2H: using your EV's battery to power your house.

The numbers make the case on their own. A modern EV battery commonly stores somewhere between 60 and 100 kilowatt-hours. A typical home uses roughly 20 kilowatt-hours a day. Do the maths and a single fully charged EV can run an average house for several days.

Compare that to a dedicated home battery, which usually stores a fraction of that and exists for one purpose. Your car already holds far more, and most of the time it's sitting still, doing nothing with it.

V2H simply puts that idle energy to work.

Where solar turns this from clever to transformative

V2H on its own is useful. Pair it with solar and it becomes something else entirely.

Here's the everyday version. Your solar panels generate the most power in the middle of the day, exactly when most people are out and the house is empty. Traditionally that surplus gets exported to the grid for a modest return, or simply wasted.

Now point that surplus at your car instead. The EV charges on free midday sun. In the evening, when the panels stop and energy is most expensive, the car powers the home back. You've shifted your own clean energy from when you made it to when you need it, using a battery you already own for other reasons.

The result is a genuinely closed loop: generate your own power, store it in your car, run your home on it, drive on what's left. For the first time, the average household can run a meaningful slice of its energy independently, without a wall of dedicated batteries and without a major construction project.

Solar made home generation normal. The EV is becoming the storage layer that finally makes it pay off around the clock.

The automotive industry knows it's not a car company anymore

This is the part reshaping the whole industry.

Carmakers have worked out that the battery, not the engine, is now the most valuable thing they build, and that a battery's value doesn't stop when the car is parked. So the smart ones have stopped selling cars and started selling energy ecosystems.

The vehicle is becoming one node in a connected system: solar on the roof, a battery in the driveway, a smart charger managing the flow, software deciding moment to moment whether to charge the car, power the house, or sell energy back. The companies that own that whole stack, hardware, software and the energy relationship, are the ones positioning to win the next decade.

It's a fundamental redefinition of the product. The question is no longer just "how far does it drive." It's "what else does it do when it's not driving." That's a different business, and the brands that understand it are already building toward it.

The honest version: what you actually need

Thought leadership that skips the friction isn't worth your time, so here's the real checklist.

Powering your home from your car needs three things working together. A capable vehicle: not every EV supports bidirectional discharge yet, though the list is growing fast. The right hardware: a bidirectional charger or inverter, which is more than a standard wall box and is where most of the upfront investment sits. A compatible setup: the home wiring, and ideally the solar and software, to manage it all safely.

Standards are still consolidating, and questions around battery warranty and cycling are fair to ask before you commit. None of this is a reason to wait. It's a reason to understand the pieces now, so you make the right call when you're next buying a car, a charger, or a solar system, because those three decisions are quickly becoming one decision.

Why New Zealand is built for this

Few places fit V2H and solar better than New Zealand.

Sun is abundant across much of the country, making rooftop solar genuinely productive. Home ownership with off-street parking is common, the practical precondition for charging and discharging at home. The grid is already largely renewable, so the whole system supports clean energy rather than propping up fossil fuels. And distance and weather make resilience real: a car that powers a home through an outage isn't a luxury here, it's a sensible piece of infrastructure.

The pieces are lining up. What's missing is mainstream understanding, the moment the average buyer realises their next vehicle decision is also an energy decision.

See where it's heading: the NZ EV & Tech Expo

This is exactly the shift the NZ EV & Tech Expo, presented by Driven, brings into one place: the vehicles, the solar and energy tech, the charging hardware, and the people building the systems that connect them.

If you want to understand how your car, your roof and your home are about to work together, this is where that future is on display, not as theory, but as something you can stand in front of and ask questions about.

Squid Group is proud to be leading the marketing for the Expo. Keep an eye out, this one's worth your time.