Both give your home stored energy for outages and expensive hours, but the battery lives in different places. With vehicle-to-home (V2H), the battery is your car: much larger, but it drives away. A home battery is fixed to the house: smaller, but always there. The right choice depends on when your car is home and what you need to keep running.
Key Takeaways
- V2H offers a much larger store, but only while a supported car is home and plugged in.
- A home battery is smaller, car-independent, and always on duty.
- Both run chosen circuits within an output rating; neither is whole-house by default.
- Choose by your car’s routine and outage pattern, not by capacity alone.
The Core Difference: A Battery That Drives Away
V2H treats the car as the home’s battery. An EV pack holds far more energy than a typical home battery, because it is sized to move a vehicle, not to run a fridge. That capacity is the attraction — and the catch. The store leaves every time the car does, and it only helps while the car is home and plugged in.
A home battery is the opposite bargain. It is sized for household loads, so it holds less, but it never leaves. It works while you are on holiday, while the car is at work, and with any car you own now or later. Our overview of bidirectional charging: V2L, V2H and V2G explained covers how V2H moves energy between car and home.
The Two Options, Side by Side
| Vehicle-to-home (V2H) | Home battery | |
|---|---|---|
| Where the energy sits | In your EV’s battery | In a fixed battery at the house |
| Typical scale | Large — a vehicle-sized pack, minus the charge you keep for driving | Smaller — sized for household loads; check the usable kWh on the spec |
| There when the car is away? | No | Yes |
| Extra hardware | A V2H-capable car, a bidirectional charger and transfer equipment | The battery and its inverter; works alongside any charger |
| What it runs | Chosen backup circuits, within the charger’s output rating | Chosen backup circuits, within the battery’s output rating |
| If you change cars | Support depends on the next car being V2H-capable | Nothing changes |
What Each One Needs Installed
V2H is a matched system: a car model the maker has enabled for home discharge, a bidirectional charger, and transfer equipment that isolates your home from the grid during an outage. Availability is still limited to specific models and systems, as when vehicle-to-home will be available explains. A home battery is a separate system installed at the panel; the car plays no part in it, and it pairs with solar and time-of-use tariffs the same way. Either way, the fixed electrical work belongs to a licensed electrician, with permits and inspection where required.
Which Fits Which Home
- Car home most evenings, outages are your worry: V2H’s large store covers essential circuits for a long time — if your car supports it.
- Car away at peak hours, or backup must work while you travel: the fixed battery is the reliable one, because it is always home.
- Rooftop solar already installed: both pair with it — the battery catches midday solar directly; a V2H car catches it only when parked at home.
- Planning to change cars soon: the home battery is car-independent; V2H ties the investment to one model’s feature list.
Charging the Car in the Meantime
Neither choice changes today’s charging. EVDANCE chargers are one-way units: they charge the car and cannot discharge it, whichever backup route you take later. A wall charger such as the EVDANCE EV-ACT5006T 48A Level 2 wall charger covers daily charging now; see the residential charging solutions page for the home range. If V2H is your likely route, sizing wiring and panel capacity with a future upgrade in mind costs little extra during a planned installation.
Frequently Asked Questions
Can I have both V2H and a home battery?
Yes. They are separate systems and can complement each other: the fixed battery covers short cuts and times when the car is away, and the car adds a large reserve for long outages. An installer designs how they share the backup circuits.
Does a home battery need a special car or charger?
No. The battery connects to the house, not the car. Any EV charges from the home supply as usual; the battery simply changes where some of that energy was stored first.
Which one costs less?
It depends on what you already own. V2H reuses a battery you already bought — the car — but adds a bidirectional charger and transfer equipment, and only on supported models. A home battery is a complete second system. Prices vary by home and region, so compare installed quotes for your case rather than headline figures.
Related Reading
- Bidirectional Charging Explained: V2L, V2H and V2G
- When Will Vehicle-to-Home Be Available?
- Is Bidirectional Charging Worth It?
- Which EVs Can Do Bidirectional Charging?
