https://soyacincau.com/2025/11/28/tnb-ackno...n-prevent-this/

TNB Acknowledges Rising EV Charger Issues. Here’s How We Can Prevent This for You
BY soyacincau
28 November 2025

Tenaga Nasional Berhad (TNB) has officially acknowledged a rise in reports involving blown cut-out fuses and electrical overload in homes where EV chargers were installed incorrectly or operated beyond the home’s supply capacity.

In a letter issued by TNB’s Distribution Network Division to the President of Malaysia Zero Emission Vehicle Association (MyZEVA) and the President of Malaysia Electric Vehicle Owners Club (MyEVOC), the utility confirmed that many of these incidents originated from domestic single-phase homes, often traced back to overloading during EV charging.

In its official statement, TNB emphasised the importance of verifying the existing electrical supply capacity before installing an EV charger. The utility noted that, for instance, households with a 1-phase 5 kW supply seeking to install a 7 kW charger may need to upgrade to a three-phase supply to safely support the additional load.

TNB also referenced compliance with the Electricity Supply Application Handbook (ESAH v3.1) and the Suruhanjaya Tenaga (ST) Guide on Electric Vehicle Charging Systems for proper installation.

"We advise all homeowners and service providers to ensure installations are compliant and adequate to handle household and EV charger loads, in order to avoid overloading and power disruption,” TNB stated.

This letter was then shared publicly by Datuk Shahrol Azral Ibrahim Halmi, President of MYEVOC, who posted it on his Facebook page to raise awareness among EV owners. Through his post, he emphasised the urgency of proper installation and safe charging practices, especially for homeowners still on single-phase supply.

Datuk Shahrol noted that the community has already seen numerous cases of blown TNB cut-off fuses and even burnt fuse casings, typically when EVs are charged at 32A (7.4kW). Some cases had escalated into actual fires at the meter location. In a few instances, the homeowners were asleep, and it was neighbours or passers-by who spotted the fire and alerted them

To reduce these risks, he echoed TNB’s advisory: Those who plan to charge consistently at 7kW should upgrade to a 3-phase supply. For homeowners who remain on single-phase, he added that a safer approach is to limit charging to 3–4kW (16–20A) to provide a safer margin. He also encouraged installing a smoke detector near the main TNB fuse or meter, especially in homes with electrical wiring older than 20 years.

His message to the EV community was clear: take these risks seriously and prioritise safety to avoid loss of property or life.

Single-Phase vs Three-Phase: It Depends on Your Home, Not Just Your Charger

While upgrading to three-phase is one effective way to increase available capacity, it is not a universal requirement. Many Malaysian homes can still charge safely on a single-phase system, provided the total household load is low enough, and the charging current is properly managed.

It ultimately comes down to:

- Your home’s existing incoming supply capacity
- The age and condition of your distribution board
- How much power do your household appliances draw
- The charging current you intend to use

This is why every home should be assessed individually, rather than assuming that single-phase is dangerous or that three-phase is automatically necessary.

How Cucuk Charge Ensures Safe, Compliant EV Charger Installation

At Cucuk Charge, installation is not just about mounting a charger; it is about ensuring your home is safe, compliant, and capable of supporting EV charging long-term. Our installations follow the exact requirements outlined by TNB and Suruhanjaya Tenaga.

Here’s how we approach every home:

1) Supply Capacity Assessment
Before recommending any charger, we verify your home’s supply capacity and evaluate how much load headroom you actually have. This determines whether you can safely stay on single-phase or whether an upgrade is advisable.

2) Full Compliance with TNB & ST Requirements

Our installations strictly adhere to:

TNB’s Electricity Supply Application Handbook (ESAH)
Suruhanjaya Tenaga’s EVCS guidelines
This ensures your charger is installed safely and meets national regulatory standards.

3) Upgrade Options Where Needed
If an upgrade is required, we can support both paths:

Single-phase to three-phase upgrade
Single-phase DB modernisation (for those who prefer to remain on single-phase)

4) Smart Solutions for Single-Phase Homes
For homes that remain on single-phase, we offer safe and intelligent alternatives such as Sparklin chargers with load-managing charging, enabling stable and protected EV charging even within limited supply capacity

TNB’s acknowledgement of rising EV-related electrical incidents is an important reminder: safe EV charging begins with proper planning and correct installation. Whether your home is single-phase or three-phase, the key is ensuring your system is assessed, compliant, and installed by trained professionals.
Our mission is to make EV charging safe, simple, and accessible, while ensuring every homeowner gets the right solution for their home, not a one-size-fits-all setup.

Cucuk Charge: EV Charger Options

Cucuk AC 22kW (Rugged | Multi output) – RM2,869.40 (Promo Price)
Cucuk CCS2 DC 30kW – RM26,800
Sparklin AC Charger (3.3kW) – RM1,200

Base Installation Costs
The prices below are starting rates, with the final cost confirmed after the site visit evaluation:

Single Phase installation – RM1,600 (includes dedicated wiring, EVDB, and safety equipment)
Three Phase installation – RM1,800 (includes dedicated wiring, EVDB, and safety equipment)
Sparklin Charger installation – RM950
Site visit fee – RM150 Klang Valley | RM200 Other Locations (rebated in the final invoice)

Coverage Area

Our installation service is currently available across the West Coast of Peninsular Malaysia, covering Kedah, Penang, Perak, Selangor, Kuala Lumpur, Negeri Sembilan, Melaka, and Johor.

Get in Touch with Us Today

If you’re an EV owner or property manager looking to set up a reliable charging solution, Cucuk Charge can help you make the transition simple and safe. Already have a charger and looking for someone to install it? We’ll handle the installation for you!

Drop us a line on WhatsApp at +60 3-3310 0030 (RKMD) for enquiries.

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https://www.caricarz.com/detail/amp/en/news...ing-risks/20540

B40 house T20 car problem

Most treat EVs as aircon or oven. Need 3 phase for safety.

Some previos ev owners are ditching evs n back to ice

Just another problem to the long list of ev challenges

charge at 20-30A shud b ok for single-phase home with enuff tolerance for 1-2 simultaneous running 1hp aircon, jus take damn long time oni

Use 2k~3kwatt cukup la

Malaysia ni they not educated for electic power la
Dunno what is kwh

Like extension 1.5mm wire pergi bantai 3kw equipment
Ayam powerbank nearlee kaboom because my friend use it for hairdryer
600w vs 1kw hairdryer


Last time ayam balik kg, my dad water heater 3.5kw use pin plug 13a. Ayam liek wtf man. Whos the contractor

Single phase charge over night?

And we have people here saying why can't we have charger at every street light pole lol

Dei the light pole wire u think very thick kah

This post has been edited by dest9116: Nov 29 2025, 07:56 AM

Very green technology, hahaha.

Funny.

i don't think so
if u ask me this is installer's problem

this sort of high power stuff, better spend more money and ask a certified electrician to install for you
instead of the usual ask bangla to tarik cable or ask uncertified people to install for a cheap price

These idiots with single phase homes insisting on EV chargers ngam2 the limit mmg bodo, mau terpaling murah with high current. When you advise them must upgrade to three phase, die2 say why you cannot do, the other contractor can do. And those idiot EV charger companies salesperson die2 dont want to lose business force the technical team to install saja.

End up many issues.

Padan mukak

cucuk charge just like pucheong

depends on the car batt capacity, can easily b few days even but then again nobody said u have to charge it to 100% in one sitting

same like henpon we jus grab n go, cum home jus plug into charger again

another gud thing is charging at lower ampere is actually moar forgiving on the batt but the trade-off is take longer

If whole taman one phase, can a house install 3 phase?

Sorry for noob

Another anxiety. Home short circuit
EV cannot have peace of mind with ICE park is it?

sos from where?

That why EV are not meant for B40 and even M40.
So many complications and dangers to compliance with safety issue to use it safely

wall of texas.

Yang i tau rule of thumb technician said is :

Lv1 EV charger on single phase ok
Lv2 EV charger onwards must tukar tu 3 phase.

if cas overnight, pakai Lv1 sudah cukup.

/ktard please advise, betui ka ini?

Aircon really need 3phase for safety meh? 1 hp only

Usually how much to upgrade to 3 phases?

Yes you can but you need to apply to TNB and the waiting list is quite long now

Used to be in 3 days to complete but now should be a month at least

If single aircon per hse it is fine anything with more than 3 air cons and a fridge running overnight recommended to switch to 3phase

This problem is UK using 3 pin and Aus also people there use granny charger but I never hear of cases of fuse overload or tripping. Houses there also majority on single phase only.

Why malaysia banyak these cases

This post has been edited by Boy96: Nov 29 2025, 07:52 PM

didnt know that tnb 1 phase supply is only 5kwh, thought it was capable like 12-13kwh or so.

Here many homeowners after power usage assessment, if their usages are almost to the limit, companies will propose to downgrade their chargers or ask the homeowners to upgrade their homes to three phase systems. Many homeowners dont want to change to three phase and downgrade their chargers, pushing the ev charger companies to install anyways eventho it’s near the current limit.

I’d say it’s the mentality of these pipu

Depends on your home and area

Many contractors can give you quotes. But prepare to fork out at least 3-5k.

Diu. Just an advertisement to promote own charger

soyaconcau: fakenews

Betul.

There are two types of charging : DC and AC charging which depend on the vehicle itself.

Example:
EMAS 7 has integrated AC charging at 11kW. (11000w/240v = 45Amp)
EMAS 5 has limited integrated AC charging at 6.6kW (6600/240 = 27.5Amp)

However, both EMAS have integrated DC charging >50kW.
To do so, one would have to perform three phases AC to DC conversion if one want to charge faster than those cars integrated AC charging circuit

Hereby lies the issue......copper conductors size must be sized to the expected amperage
https://www.elandcables.com/media/vyrp3kxq/...1a-and-4d1b.pdf

To make it short, if you live at terraced houses and sharing those thick ulitity wires..........your neighbour house might get on fire instead of yours when you are charging at full power.....due to wiring/resistance issue.

This post has been edited by JohnLai: Nov 29 2025, 09:14 PM

Means safe. Burn 13a fuse. Normal user, just bath cold water. Save energy.


Just lulz.... No serious ok.

single phase normally come with 63amp fuse, during the assessment contractor ask me to on all bedroom aircond, two 1.5hp aircond and two 1hp aircond, it is drawing about 40amp of current, if single phase sure easily hit limit and affect the whole row neighborhood of electricity

Wanna just drive a car oso susah.... EVs.... Lol

This post has been edited by xeNOS: Nov 29 2025, 09:19 PM

3 phase have to pay more. They do not like the extra monies ponied up front. Whats more every month bill also more.

1 phase landed house also not ideal for EV

Upgrade 3 phase, need to fork out moneh

And that the "funny" and dangerous part;

Example, you live at the end of a terraced housing......then you pull a lot of power from the common wires. Now, unluckily enough, your neighbour at the middle of the terraced housing has wiring resistance issue and caught fire instead.....and your neighour like, WTF and how the wire overheat and caught fire?


Then again, majority of AC charger box is practically just a relay controlled switch.

DC charger is different since it perform 3 phases AC to DC conversion and tends to be more expensive and heavier.

Ada one special DB box for EV charger and Isolator switch, if u engage proper electrician sure pakai 6mm above wire.

Deswai padan mukak if anything happens

Who in their right mind if buying proton emas 5 at RM57k gonna spend the Rm5-10k to upgrade to 3 phase.

Just install evse and cap to 16a max.


But bifoti mindset never learn. They gonna max out their chargers and then curi curi upgrade fuse and create more issues.

another problem is B40s will try save out cost of installation, then hire unethical installer to take current directly from meter box without going through DB.

Typical b40 minded, so have to fork out even more money to rebuild own house after burnt.

This post has been edited by Aftermaths: Nov 29 2025, 11:11 PM

go cari EV Connection install la, buy sendiri cari electrician pasang lampu install ev charger sure will kena one day

Betul ke?

So what are their actual reason?

How many pointers below here will kena?
- Tyre cost.
- Battery cost.
- Cannot go from Perlis to Johor without charging for 2 hours.
- Charging cost & charging procedure. (Planning)
- Maintenance cost.
- Cannot vroooom like ICE car, tarak syiok.
- Wiring & something electrical spoil very often.
- Their car type is those after accident cannot be opened by fire brigade.


EV is richman toy, tarak ngam for poorfag like me.