If you’re planning to install an EV charger at home, you’ve probably already started getting quotations.
Different installers. Different prices. Different promises.
So how do you actually decide?
The difference is not in what they offer — it’s in what they understand.
This guide gives you a practical set of questions to separate a professional EV charger installer from a risky one.
1. “Are You a Registered Electrical Contractor?”
This is your first filter.
EV charger installation in Malaysia must be carried out by:
- A registered electrical contractor
- Under supervision of a competent person
This is a regulatory requirement under Suruhanjaya Tenaga guidelines
What you want to hear:
- Clear confirmation
- Willingness to provide credentials
Red flag:
- Vague answers like:
- “We have experience”
- “We’ve done many installations”
Experience does not replace compliance.
2. “Who Is the Competent Person Responsible for My Installation?”
This is where many installers fail.
Every proper installation should have:
- A named Wireman / Chargeman / Engineer
Why this matters:
- They are legally responsible for the work
- They ensure compliance with standards
Red flag:
- “Our team handles it”
- No specific qualified person mentioned
3. “Will You Assess My Home’s Electrical Load Before Installation?”
A professional installer must understand:
- Your existing usage
- Your system limits
Why:
EV charging is a continuous high load
Without assessment:
- You risk overloading your system
Good answer:
- “Yes, we will check your DB, load, and usage pattern”
Red flag:
- “No need, all houses can support”
4. “Will This Be Installed on a Dedicated Circuit?”
This is critical.
EVCS guidelines require:
A dedicated final circuit for EV charging
Why:
- Prevent overload
- Ensure stable operation
- Protect your wiring
Red flag:
- Sharing with sockets or other appliances
5. “What Cable Size Will You Use?”
This question reveals technical depth.
Good installer:
- Specifies cable size (e.g. 6mm², 10mm²)
- Explains based on:
- Distance
- Current
- Installation method
Red flag:
- “Standard cable”
- No clear specification
6. “What Protection Devices Are Included?”
Every EV charger installation should include:
- MCB (overcurrent protection)
- RCCB (earth leakage protection ≤30mA)
Good installer:
- Specifies:
- Type (e.g. Type A RCCB)
- Rating (e.g. 40A, 30mA)
Red flag:
- No mention of RCCB
- Cannot explain protection setup
7. “Will You Recommend a Fuse Upgrade?”
This is a trap question.
Correct approach:
- Fuse upgrade only after:
- Full system assessment
- Cable and DB evaluation
Red flag:
- Immediate suggestion to:
- “Just upgrade fuse to bigger size”
This is unsafe if the system is not upgraded accordingly.
8. “Will You Perform Testing and Commissioning?”
Installation is not complete without testing.
Proper process includes:
- Load testing
- Safety checks
- Charger verification
Red flag:
- Installer finishes and leaves without testing
9. “What Happens If There’s a Problem After Installation?”
This tests accountability.
Good installer:
- Offers:
- Workmanship warranty
- On-site support
- Clear response timeline
Red flag:
- No clear after-sales support
- “Contact manufacturer” type answers
10. “Can You Explain My Home’s Charging Limit?”
This is where expertise shows.
Good installer:
- Explains:
- Maximum usable current
- Charging speed expectations
- System limitations
Red flag:
- “Can use full power, no issue”
This usually means no real assessment was done.
Simple Summary Checklist
Before you confirm any installer, make sure:
- They are licensed and compliant
- They have a competent person responsible
- They assess your home’s electrical system
- They install a dedicated circuit
- They specify cable and protection clearly
- They avoid unsafe shortcuts
- They perform testing and provide support
Final Thoughts
Most homeowners compare:
- Price
- Brand
- Speed
But the real difference is:
How well the installer understands your electrical system — and designs around it.
Because EV charging is not just about powering your car.
It is about:
- Protecting your home
- Ensuring long-term reliability
- Operating safely every day
If you’re still exploring, you may also want to read:
→ Why Cheap EV Charger Installations Can Be Dangerous
→ What Makes a Good EV Charger Installer in Malaysia?
Let our obsession with quality protect your safety.
Because when it comes to EV charging and electrical systems, there’s no room for compromise.
Need your EV charger or electrical setup professionally inspected?
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