Yes — you can leave an EV charging overnight, and a home wall charger is built for exactly that. The first night with a new 48 A unit is the one owners tend to watch, so it helps to know the shape of a normal session: it starts within seconds of plugging in, runs at full rate while most of the energy moves, slows as the car nears its set limit, then stops and sits idle until morning.
Key Takeaways
- A normal overnight session starts fast, runs at full rate, tapers near the limit, then stops and idles.
- At 48 A, most daily energy is replaced in the first few hours; the rest of the night is parked time.
- Four morning checks — charge level, energy, connector condition, breaker — prove the routine.
- Trips, error states and scorch marks are installer calls, not DIY jobs.
The Shape of a Normal Session
The car runs the session; the charger supplies what the car asks for, up to its rating. On the EV-ACT5006T 48A Level 2 wall charger that ceiling is 48 A, about 11.5 kW. A typical night moves through four stages:
| Stage | What happens | What you notice |
|---|---|---|
| Start | The car and charger handshake and the session begins | The car confirms charging on its screen or app |
| Full rate | Most of the night’s energy is delivered at up to 48 A | The cable and connector can feel slightly warm — under load, that is expected |
| Taper | The car slows the rate as it approaches the limit you set | Charging continues, more slowly; nothing is wrong |
| Finish | The car stops the session at its limit and the charger goes idle | In the morning the car shows the target charge, reached hours earlier |
Because 48 A moves energy quickly, the full-rate stage is short for most cars: a session that adds 30 kWh takes under three hours at full rate. The rest of the night is not charging at all — the car is simply parked, connected and done. Our general guide to leaving an EV charging overnight covers charge limits and scheduling, which decide when that finish happens.
A Quick Morning Check
On the first morning, four checks tell you the night went as it should:
- The charge matches the limit you set — not higher, and not far below it.
- The energy roughly matches yesterday’s driving. Compare the session’s delivered kWh with the car’s trip readout; a large mismatch is worth a second look, a small one is rounding and charging losses.
- The connector releases normally and shows no damage, discolouration or scorch marks.
- The breaker has not tripped and the panel looks as it did the night before.
Pass those four and the routine is proven. From the second night on, plugging in takes seconds and the session looks after itself — the same always-connected pattern that makes leaving a Level 1 charger plugged in unremarkable, at Level 2 speed.
What Is Not Normal
A short list of things should end the experiment and start a phone call to your installer or electrician:
- The breaker trips during the session, once or repeatedly.
- An error state on the car or charger is still showing in the morning.
- A burning smell, or scorch marks near the connector, the outlet or the panel.
- Anything on this list that repeats on the second night.
Do not open the unit or rewire anything yourself. A new installation that misbehaves in its first nights is the installer’s job to put right, and the permit inspection behind it is part of that protection. The battery side of the overnight question — whether nightly charging wears the pack — is covered in does Level 2 charging shorten battery life.
Frequently Asked Questions
Will the charger keep charging all night long?
No. It charges until the car reaches the limit you set, then stops. Most of a long night is idle time with the car parked at its target — which is the point of plugging in every night.
Is it OK that the cable feels warm during the first session?
Slight warmth under a 48 A load can be normal. Heat you cannot comfortably keep a hand on, discolouration, or any smell is not — stop the session and call your installer.
Should my first charge go to 100%?
There is no need. Use the daily limit you plan to keep — many makers suggest a limit below 100% for everyday use. The session’s shape is the same either way, so the first night tests the routine you will actually live with.
Related Reading
- Can You Leave an EV Charging Overnight?
- Can I Leave a Level 1 Charger Plugged In All the Time?
- Does Level 2 Charging Shorten Battery Life?
- How Many kW Is a Level 2 Charger?
