EV Charging for Factories and Industrial Buildings in Malaysia: Why Maximum Demand Decides the Cost
The short answer
For a Malaysian factory or warehouse, the charger hardware is rarely the number that decides the project. What decides it is maximum demand: a commercial or industrial supply is billed on the highest half-hour demand recorded in the month, so chargers that switch on during the production peak can raise your MD charge for the whole month even if the kWh used is small. The fix is almost always scheduling and load management rather than a supply upgrade, and the order of work is: read your TNB bill's MD figure first, then size the chargers around the spare headroom you actually have.
Why maximum demand matters more than the charger price
A home charger is a small addition to a domestic supply. A factory is different. Industrial and commercial tariffs in Malaysia carry a maximum demand component, charged on the highest demand recorded in any half-hour window during the billing month. One bad half hour sets the charge for the whole month.
That creates a specific risk on an industrial site. Staff arrive at the start of a shift and plug in. Compressors, chillers and production lines are also ramping up at that moment. If a bank of chargers adds load on top of the existing morning peak, the new MD can be noticeably higher than it was before, every month, regardless of how much energy the cars actually took.
The same logic drives the choice between AC and DC. We cover that trade-off in detail in AC or DC EV charging for your building in Malaysia, and the broader budget picture in commercial EV charger cost in Malaysia.
What different charger set-ups add to your demand
The table below shows the connected load a typical industrial charger mix adds, and what that usually means for an MD-billed site. Actual figures depend on your supply, your existing peak and whether load management is fitted.
Set-up | Typical connected load | Effect on maximum demand | Usually suits |
|---|---|---|---|
A few 7kW AC points (single-phase) | Low | Small, and easy to absorb if charging is off-peak | Small sites, a handful of staff cars |
Bank of 22kW AC points (three-phase) | Moderate to high if all charge at once | Can add a visible MD step unless load is managed | Offices, staff car parks, light industrial |
22kW AC with dynamic load management | Capped to spare headroom | Designed to add no new peak | Most factories, the default recommendation |
Single DC fast charger | High and sudden | Very likely to set a new MD if unscheduled | Fleet turnaround, visitor or logistics bays |
DC plus scheduling or battery buffer | High, but shifted or smoothed | Peak avoided or flattened | Depot and fleet charging on tight supplies |
Shift patterns decide the design
Most industrial sites have an obvious charging window and do not use it. Work out where yours is before anyone quotes you hardware.
Single day shift. Cars sit still from roughly 8am to 5pm. That is eight hours of dwell time, which means low-power AC charging is enough for almost everyone and there is no case for DC on staff bays.
Two or three shifts. Cars turn over at handover, which is also when plant load spikes. Staggered charging by bay, or a load manager that throttles during handover, is the cheap answer.
Fleet vans and light trucks. These return at a known time and need a known energy amount. Depot charging overnight on AC is usually cheaper than DC, because the vehicles are parked for ten hours anyway.
Visitor and logistics bays. Short dwell, so DC is justified here if it is justified anywhere. Keep it on a separate schedule from the production peak.
Supply, wiring and what your installer must check
Before any charger is specified, three things need to be read off the site, not guessed:
Your recorded maximum demand. It is on your TNB bill. Compare it with your approved supply capacity. The gap is your headroom.
The switchboard. Spare ways, the incoming breaker rating, and whether there is physical room for a new sub-board and metering.
Cable runs. Industrial car parks are big. Distance drives cable size and cost far more than the charger model does.
Three-phase is normal on industrial sites, so the usual domestic headache does not apply here. If you are also looking at a landed property, we cover that separately in do you need three-phase power for an EV charger in Malaysia. The wiring and protection requirements an installer must meet are set out in EV charger installation requirements Malaysia 2026.
Licensing: when a factory needs one and when it does not
This is the question that stalls most industrial projects, and the answer turns on who uses the charger and whether you charge them for the electricity.
Chargers used only by your own staff and your own vehicles, with no separate charge for electricity, are normally treated as part of your own installation.
The moment you sell electricity to third parties, or open the bays to the public, you are in Suruhanjaya Tenaga's electric vehicle charging system licensing territory.
Suruhanjaya Tenaga publishes the criteria and the document list for an EVCS licence application. Read it before you commit to a billing model.
Official source: Suruhanjaya Tenaga — criteria and documents required for EVCS licence application (PDF) and the Suruhanjaya Tenaga website. Our plain-English walkthrough is in does your building need an EVCS licence.
Incentives worth checking before you buy
Malaysian businesses investing in qualifying green assets have historically been able to claim under the Green Investment Tax Allowance. Eligibility, qualifying asset lists and deadlines change, so check the current position with MIDA rather than relying on a vendor's summary. We track what is claimable in GITA for EV chargers.
What people actually ask
These are real questions from Malaysian owners and electricians discussing EV charger installs publicly, and from the searches that bring people to this site.
“If whole taman one phase, can a house install 3 phase?” Asked on the Lowyat forum. On an industrial site this is rarely the blocker, because three-phase is already there. The equivalent industrial question is whether your approved capacity has headroom, not whether three-phase exists.
“mau terpaling murah with high current” A Lowyat poster on cheap installers pairing high current with the wrong supply. On a factory this is the failure mode that trips plant, not just a charger.
“So many complications and dangers to compliance with safety issue” Also from Lowyat. For commercial work the compliance path is well defined: competent person, proper protection, and ST rules if you bill third parties.
“Do I need a licence to put chargers at my factory?” One of the most common commercial enquiries we get. It depends entirely on whether you sell the electricity.
“Will the chargers blow my maximum demand?” The right question, and the reason this article exists. With load management, the answer should be no.
Discussion source: Lowyat forum thread on EV charger issues in Malaysia.
A sensible order of work
1. Read the bill. Find your recorded maximum demand and your approved capacity.
2. Count the cars. How many EVs today, and a realistic number for two years out.
3. Fix the dwell window. Match charger power to how long cars actually sit, not to how fast they could charge.
4. Decide the billing model. Free for staff, internal recharge, or sold to third parties. This decides your licensing.
5. Specify load management before hardware. It is almost always cheaper than a supply upgrade.
6. Get a site survey. Cable runs and switchboard condition move the price more than the charger brand.
Related reading
Frequently asked questions
Will EV chargers increase my factory's maximum demand charge?
They can, if they are allowed to run during your existing peak. A dynamic load management system caps total charger draw to the spare headroom on your supply, so the site's recorded maximum demand does not move. Scheduling charging outside the production peak has the same effect and costs nothing in hardware.
Do I need a licence to install EV chargers at my factory in Malaysia?
If the chargers are used by your own staff and vehicles and you do not sell the electricity, they are generally treated as part of your own installation. If you sell electricity to third parties or open the bays to the public, Suruhanjaya Tenaga's EVCS licensing rules apply. Check the criteria document on the Suruhanjaya Tenaga website before you choose a billing model.
Should a factory install AC or DC chargers?
For staff cars that sit for a full shift, AC is almost always the right answer because dwell time does the work. DC makes sense for visitor bays, logistics vehicles and fleet turnaround where the vehicle is only on site for a short period. Many industrial sites end up with mostly AC and one DC unit.
Do I need to upgrade my TNB supply to add chargers?
Often not. A supply upgrade is the expensive route and is only necessary when there is genuinely no headroom. Read your recorded maximum demand against your approved capacity first; load management usually closes the gap without an upgrade.
Can my business claim tax incentives for EV chargers?
Malaysian businesses investing in qualifying green assets have been able to claim under the Green Investment Tax Allowance. Eligibility and deadlines change, so confirm the current position with MIDA or your tax adviser rather than relying on a supplier's claim.
How many charging bays should a factory start with?
Start from how many EVs are on site today plus a realistic two-year figure, then install the groundwork and conduit for more than you fit now. Trenching and cable runs are the expensive part; adding a charger to prepared infrastructure later is cheap.
Get a free site assessment
We will read your maximum demand, look at your switchboard and your car park, and tell you what your site can take before anyone talks about hardware.
Background reading on Malaysia's charging infrastructure programme: TNB on advancing EV adoption with enhanced charging infrastructure.
