Capacitor Bank Supply, Design & Installation in Malaysia
Avoidance of power factor fines, reduction in energy costs and/or increased electrical system efficiency.
An effective electrical system ensures that your business runs smoothly, your expenses are reasonable and that your operations are efficient. Yet many industrial and commercial facilities in Malaysia quietly lose money to poor power factor, excessive reactive power, and avoidable electricity charges - often without realising it.
At Central Capacitors, we specialise in the supply, design, installation, testing, commissioning, and maintenance of Capacitor Bank systems for businesses across Malaysia. Our customised power factor correction solutions are engineered to improve electrical performance, lower operational costs, and maximise energy efficiency, all while staying compliant with local electrical standards.
Whether you run a manufacturing plant, commercial building, shopping mall, hotel, hospital, warehouse, or data centre, our engineering team designs a Capacitor Bank solution around your facility's actual electrical needs - not a generic template.
What is a Capacitor Bank?
A Capacitor Bank is a group of electrical capacitors connected together to improve the power factor of an electrical system. It supplies the reactive power that inductive equipment needs, easing the load on your electrical network so the whole system runs more efficiently.
Many industrial facilities rely on motors, pumps, compressors, air-conditioning units, lifts, and production machinery - all of which consume reactive power. These machines are essential to daily operations, but left uncompensated, they quietly drag down the efficiency of your entire electrical system.
A well-designed Capacitor Bank automatically provides this reactive power, allowing your system to provide energy more efficiently and with no unnecessary loss.
In addition to the savings in electricity costs, a properly designed Capacitor Bank provides additional benefits such as voltage stabilization, availability of electrical capacity, reduced stress on equipment and increased power system reliability.
Understanding Power Factor
Power factor is just a way of quantifying the efficiency of the use of electricity that your facility receives. A high power factor will be good because most of the electricity is being used for useful work; a low power factor will be bad because part of the electricity is being wasted.
Reactive power is power that is consumed and not used for any useful purpose, but is necessary for the equipment to operate, such as the power consumed by equipment like induction motors, transformers, welding machines and HVAC systems. Too much of it increases the electrical load on your transformers and cables, creating losses throughout the system.
Improving power factor - typically through a properly sized Capacitor Bank - helps your business use electricity more efficiently, cut wasted energy, ease the strain on equipment, and get more out of your existing electrical infrastructure.
How a Capacitor Bank Improves Power Factor & Cuts Costs
A correctly designed Capacitor Bank is an effective way to correct power factor.
By supplying reactive power locally, a Capacitor Bank reduces the reactive current drawn from the grid - improving system efficiency and lowering the total electrical demand on your facility.
Key benefits include:
- Improved power factor
- Reduced reactive power
- Lower operational costs
- Better voltage regulation
- Reduced electrical losses
- Increased transformer capacity
- Longer equipment lifespan
- Higher overall energy efficiency
- More reliable electrical performance
For many businesses, investing in a Capacitor Bank can be a practical upgrade to their electrical infrastructure.
Reduce Reactive Power for Higher Efficiency
Reactive power is a normal part of electrical systems running heavy inductive equipment. But too much of it reduces the efficiency of your network and increases the current running through cables, transformers, and switchgear.
Reactive power compensation solves this by supplying reactive power locally through a Capacitor Bank, instead of drawing it from the utility.
By reducing reactive power, your business can:
- Improve electrical efficiency
- Reduce energy wastage
- Lower heat generation
- Improve voltage stability
- Increase available electrical capacity
- Extend equipment life
- Optimise overall system performance
Every Capacitor Bank we design at Central Capacitors is engineered around your facility's actual electrical load profile - not a one-size-fits-all spec sheet.
Avoid TNB Surcharges from Low Power Factor
Many business owners don't realise poor power factor can lead to extra electricity charges.
When a facility consistently runs a low power factor, the network has to deliver more current to provide the same usable power. This raises the demand placed on infrastructure and can trigger additional charges from the utility provider.
Installing a properly designed Capacitor Bank corrects this - improving power factor and cutting the unnecessary reactive power demand behind those surcharges.
Our engineers carry out a detailed assessment of your electrical system before recommending the right power factor correction solution for your site.
Our Capacitor Bank Services
Consultation & Site Assessment
We evaluate your electrical system, operating conditions, and
current power factor before recommending a solution.
Electrical Load Analysis
Our engineers analyse your facility's load profile to
determine the right Capacitor Bank capacity and configuration.
System Design
Every Capacitor Bank is designed specifically around your
operational requirements for efficient operation and long-term
performance.
Supply of Quality Components
We supply high-quality capacitors, contactors, protection
devices, and controllers from manufacturers we trust.
Installation
Safe and efficient installation by our technicians, with
minimal disruption to your operations, with our Capacitor Bank
systems.
Testing & Commissioning
All systems are tested before commissioning to ensure their
performance, safety and compliance.
Regular maintenance
Preventive Maintenance helps keeping your Capacitor Bank
running efficiently and reduces the risk of unexpected
failures.
Prompt Diagnostic, Troubleshooting & Repairs
Our technical staff will diagnose, troubleshoot and replace
the components quickly to minimise downtime.
Why Choose Central Capacitors for Your Capacitor Bank?
The choice of engineering partner is as critical as the choice of the right engineering equipment.
Businesses across Malaysia choose Central Capacitors for practical engineering solutions, technical knowledge and reliable support.
To work with us, you receive:
- Experienced electrical engineers
- Made-to-order Capacitor Bank solutions
- Complete turnkey project management service provided by a single source.
- High-quality electrical components
- Professional installation, commissioning.
- Preventive maintenance programmes
- Responsive technical support
- Reliable after-sales service
- A sincere desire to be safe and quality.
From reducing electricity bills, enhancing power quality, to modernising your electrical infrastructure, our team is dedicated to providing solutions that are designed to generate tangible, long-term benefits.
Industries We Serve
Our Capacitor Bank solutions are used across:
- Manufacturing Facilities
- Commercial Buildings
- Shopping Malls
- Hotels
- Hospitals
- Warehouses
- Data Centres
- Educational Institutions
- Food & Beverage Processing
- Industrial Plants
Every project is customised to the client's electrical system, operational needs, and future expansion plans.
Power factor is a measure of how efficiently electrical power is being used in an AC (alternating current) system.
Electricity in AC systems has two components:
- Real Power (kW) – does actual work (turns motors, lights bulbs, runs machines)
- Reactive Power (kVAR) – doesn’t do work but is needed to create magnetic fields (used by motors, air-conditioners, transformers)
- Apparent Power (kVA) – the combination of both
Power Factor = kW ÷ kVA
Why does it matter?
- If your power factor is low, you are drawing more total current than necessary
- TNB penalize commercial/industrial customers for low power factor.
- When your power factor is high, current rating decreases
- Good PF reduces load on cable and transformer and lower Voltage drop
- Improving power factor saves money and reduces strain on electrical equipment
- Avoid frequent breakdown and increase equipment efficiency with good PF
Power Factor Penalty
Penalty charges are incurred on your electricity bill when your PF falls below 0.85
- 1.5% surcharge of the current bill - for every 0.01 less than 0.85 PF
- If your PF falls below 0.75 the penalty charge increases
- 3% surcharge of the current bill - for every 0.01 less than 0.75 PF
Sample TNB bill with Power Factor Penalty
| Jenis Caj | Tanpa ST | Dengan ST | Jumlah | |
|---|---|---|---|---|
| Jumlah Penggunaan Anda | kWh | 6,551.00 | 0.00 | 6,551.00 |
| Caj Penjanaan | ||||
| Tenaga (RM0.2703/kWh) | RM | 1,770.74 | 0.00 | 1,770.74 |
| AFA (6,128kWh, -RM0.065/kWh) mulai 01/10/25 | RM | -398.32 | 0.00 | -398.32 |
| AFA (423kWh, -RM0.0891/kWh) mulai 01/11/25 | RM | -37.69 | 0.00 | -37.69 |
| Kapasiti (RM0.0883/kWh) | RM | 578.45 | 0.00 | 578.45 |
| Caj Rangkaian (RM0.1482/kWh) | RM | 970.86 | 0.00 | 970.86 |
| Caj Peruncitan | RM | 20.00 | 0.00 | 20.00 |
| Caj-Caj Lain | ||||
| Surcaj Angkadar Kuasa (0.68) | RM | 1,045.46 | 0.00 | 1,045.46 |
| Caj Penggunaan Bulan Semasa | RM | 3,949.50 | 0.00 | 3,949.50 |
| KWTBB (1.6%) | RM | 53.12 | ||
| Caj Semasa | RM | 4,002.62 | ||
Click To View Table Image
Calculation of Penalty charge
Bill Amount: RM 3,949.50 – 1,045.46 = RM 2,904.04
Power Factor: 0.68
0.85 – 0.75 = 10 x 1.5% x RM2,904.04 = RM435.60
0.75 – 0.68 = 7 x 3% x RM2,904.04 = RM609.85
RM435.60 + RM609.85 = RM1,045.45
What should I do to avoid being charged a Penalty?
- Install a capacitor bank. A capacitor bank supplies capacitive reactive power to your electrical system to counteract the inductive reactive power from loads, which improves the overall power factor.
How does a capacitor bank work?
Will my TNB bill increase after installing a capacitor bank?
- No, installing a capacitor bank will not increase your bill. The capacitor bank does not need any power supply because the reactive power is already stored inside the capacitor itself. The reactive power is discharged automatically to your electrical system as and when it is needed.
Does the capacitor bank need to be charged?
- No, a capacitor bank does not need a power supply, and does not need to be charged.
What is the life span of a capacitor bank?
- It depends on how frequently it discharges reactive power to your electrical system. In general, a well maintained and properly sized capacitor bank can last for up to 5-10 years. After this time the capacitor cylinders may need to be replaced.
Does a capacitor bank need to be maintained?
- Yes, we recommend all our customers to conduct periodic preventative maintenance to ensure all parts are functioning well, and to avoid incurring any future penalties.
Below are extracted from TNB webpage on low power factor. Attach the Bahasa version, the English, and Mandarin.
Frequently Asked Questions
How do I know if my facility needs a Capacitor
Bank?
If your facility has a low power factor, high electricity
costs, or runs a large number of inductive loads like motors
and transformers, a Capacitor Bank could significantly improve
efficiency. A professional assessment will confirm an
appropriate solution for your site.
How much can a Capacitor Bank reduce electricity
costs?
Savings depend on your electrical load, existing power factor,
and operating conditions - businesses may see a noticeable
drop in electricity-related costs after correcting power
factor.
Do Capacitor Bank systems require regular
maintenance?
Yes. Routine inspection and preventive maintenance keep the
system reliable, extend its lifespan, and maintain consistent
performance.
Can a Capacitor Bank improve equipment lifespan?
Yes. By improving power factor and reducing unnecessary
current flow, it reduces stress on motors, transformers, and
distribution equipment.
Do you provide Capacitor Bank design, installation, and
maintenance throughout Malaysia?
Yes. Central Capacitors handles the full process -
consultation, design, supply, installation, testing,
commissioning, maintenance, and technical support - for
industrial and commercial facilities across Malaysia.
Speak to Our Engineering Team
Planning a new installation, upgrading an existing system, or looking to improve power factor and cut energy costs? Central Capacitors is ready to help.
Contact our team today to schedule a site assessment, discuss your project, or request a customised quotation for Capacitor Bank supply, design, installation, and maintenance anywhere in Malaysia.
Call us today at 03-5879 9040 if you are experiencing a PF Penalty or 'Surcaj Angkadar Kuasa'. Please prepare a copy of your TNB bill on hand for an accurate assessment.