An inverter is the component that turns DC power into AC power. An EV battery stores DC, while homes and the grid run on AC — so whenever energy flows out of an electric car, through vehicle-to-load, vehicle-to-home or vehicle-to-grid, an inverter has to make that conversion. It is the part that makes bidirectional charging possible, and the part a normal charger does not have.
Key Takeaways
- An inverter converts DC to AC — the conversion every form of bidirectional charging depends on.
- Charging uses the opposite conversion (a rectifier): in the car for AC charging, in the station for DC fast charging.
- A bidirectional charger is an inverter unit connected to the car’s DC side; a normal AC wallbox converts nothing and cannot discharge a car.
- Solar, hybrid and drive inverters are different components — always ask “inverter between what and what?”
Two Directions, Two Conversions
Charging and discharging are mirror images, and each direction needs its own conversion:
| Power flow | Conversion needed | Where it happens |
|---|---|---|
| AC charging (home wallbox) | AC to DC, by a rectifier | Inside the car, in its onboard charger |
| DC fast charging | AC to DC, by a rectifier | Inside the charging station |
| V2L (car powering appliances) | DC to AC, by an inverter | Inside the car |
| V2H and V2G (car powering a home or the grid) | DC to AC, by an inverter | Usually inside the bidirectional charger |
This is also why an ordinary AC wallbox contains no inverter and no rectifier either: it passes AC through to the car and lets the car’s onboard charger convert it, as are EV chargers AC or DC explains. A box that converts nothing in one direction cannot convert anything in the other.
Why a Bidirectional Charger Is Really an Inverter Unit
A bidirectional charger connects to the car on the DC side. It takes DC from the battery, and its inverter turns that into AC matched to the building or the grid: same voltage, same frequency, in step with the grid waveform. When the car charges, the same unit works the other way. Around that core job sit the safety functions any grid-connected inverter needs, above all shutting down its output the moment the grid fails, so the car never energises lines repair crews are working on.
Two consequences follow. First, the car still has to cooperate: it must allow DC energy out of its charge port under the charger’s control, which is a feature the carmaker enables on specific models — which EVs can do bidirectional charging is the check. Second, the bidirectional unit is a different product from a wallbox, not a setting inside one. The family it belongs to is set out in bidirectional charging explained: V2L, V2H and V2G.
The Other Inverters You Will Hear About
The word also appears in two neighbouring places, which is where the confusion starts:
- A solar inverter turns the DC from rooftop panels into AC for the house. It works with panels, not with a car battery.
- A hybrid inverter handles solar panels and a stationary home battery together. The battery it manages sits in the house, not in a vehicle.
- The car’s own drive inverter turns battery DC into AC for the motor while driving. It is part of the car, separate from charging.
All four are inverters; they are not interchangeable. A solar or hybrid inverter cannot discharge your car, and a bidirectional charger is not a substitute for either. If a quote or a product page uses the word, the useful question is always: inverter between what, and what?
What This Means for the Charger on Your Wall
EVDANCE chargers are one-way AC units, and the inverter question is exactly why: they hand AC power to the car and let the car’s own converter do the charging work. The EVDANCE EV-ACT5006T 48A Level 2 wall charger is built that way on purpose — up to 48 A, hard-wired or on a NEMA 14-50 plug, ETL, FCC and CE listed. If bidirectional use is in your plans, budget for a dedicated bidirectional unit matched to the car, and keep the one-way charger for daily driving; the residential charging solutions page covers that everyday range.
Frequently Asked Questions
Can an inverter be added to my existing wallbox?
No. A one-way wallbox has no conversion hardware to switch on; the bidirectional unit is a separate product that replaces it. An adapter cannot add the function either.
Does a DC fast charger contain an inverter?
Its converter works in the charging direction, turning the grid’s AC into DC for the battery. Some power electronics can be designed to work both ways, but a fast charger is sold and approved for the direction it is built for.
Is the inverter in the car or in the charger for V2H?
Usually in the charger. That is why V2H systems pair specific cars with specific bidirectional units: the car supplies DC, the unit inverts it for the house.
Related Reading
- Bidirectional Charging Explained: V2L, V2H and V2G
- Which EVs Can Do Bidirectional Charging?
- Are EV Chargers AC or DC?
- Is Bidirectional Charging Worth It?
