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TNB Customer Guide EV Home Charger - English
What should I do before installing an EV home charger?
Appoint a licensed wireman or electrical contractor registered with the Energy Commission (ST) to check your home’s total electricity usage, including the EV charger.
TNB electricity supply types:
- Single-phase: Suitable for homes with total usage up to 10 kW
- Three-phase: Suitable for homes with usage above 10 kW up to 37 kW
The EV home charger must be connected using a dedicated circuit from your home’s distribution board (DB).
Do I need approval from TNB to install an EV home charger?
No approval from TNB is required to install an EV home charger.
However, if your home needs to be upgraded from single-phase to three-phase supply, you will need to apply to TNB for the upgrade.
Do I need to upgrade my electricity supply to install an EV home charger?
This depends on your home’s total electricity usage:
- If the total usage does not exceed 10 kW, your current single-phase supply is sufficient.
- If the total usage exceeds 10 kW, an upgrade to three-phase supply is required.
How can I check my current TNB electricity supply at home?
Single-phase supply: 2 wires connected to your TNB meter.
Three-phase supply: 4 wires connected to your TNB meter.
How can I check my home’s current electricity usage?
You can view your usage details in the myTNB app, available for customers with smart meters.
Who can help me check my electricity usage and EV charger requirements?
A licensed wireman or electrical contractor registered with ST can help assess your current usage and advise on any upgrades needed.
How do I apply to upgrade my TNB electricity supply?
Visit myTNB for step-by-step guidance.
How much does it cost to upgrade my electricity supply?
Sample cost calculations are available on the myTNB website via myTNB. Please note that internal wiring costs inside your home are not included and will be charged separately by your contractor.
What happens if I don’t upgrade my supply even though my usage is too high?
You may experience frequent power trips or outages due to electricity overload, which can affect your home appliances.
Can a contractor upgrade only the fuse without applying to TNB?
No. This is not allowed. Any changes to TNB’s meter or fuse are strictly prohibited, as they can be unsafe and may cause fire risks.