When it comes to improving power factor and reducing electricity costs, choosing between fixed and automatic capacitor banks is a critical decision. Each type offers specific advantages depending on your facility’s electrical load profile, budget, and system complexity.
At Neutron Energy Control, we help businesses select and install the right capacitor bank solution to optimise performance and lower utility bills.
Fixed capacitor banks are hardwired into an electrical system and supply a constant level of reactive power. These systems are ideal for facilities with steady, unchanging loads, such as lighting circuits, base-load motors, or HVAC systems running at full capacity.
Cost-effective and simple to install
Minimal maintenance required
Ideal for predictable load conditions
Provides consistent power factor improvement
Not suitable for systems with variable or fluctuating loads
Risk of overcorrection when the actual load drops below the capacitor’s output
Manual switching required if the system needs to adapt
Automatic capacitor banks use controllers and contactors to switch capacitors in or out based on real-time reactive power demand. This makes them ideal for facilities with variable loads—such as manufacturing plants, mines, or buildings with frequently changing equipment usage.
Automatically adjusts to changing loads
Prevents overcorrection and protects sensitive equipment
Enhances power quality and voltage stability
Suitable for large, dynamic electrical systems
Higher initial investment than fixed systems
Slightly more complex installation and maintenance
The best capacitor bank for your business depends on your electrical load pattern, power factor goals, and long-term efficiency strategy.
| Facility Type | Recommended Solution |
|---|---|
| Constant base load (e.g. lighting, pumps) | Fixed Capacitor Bank |
| Variable or fluctuating load (e.g. factories, workshops) | Automatic Capacitor Bank |
| Sensitive equipment prone to power issues | Automatic with Harmonic Filtering |
| Budget-conscious, small operations | Fixed Capacitor Bank |
If you're unsure, a professional power factor audit can determine which option will deliver the best return on investment.
We supply, install, and maintain both fixed and automatic capacitor bank systems for businesses across South Africa. Our engineers provide:
On-site inspections and load profiling
System design based on your unique requirements
High-quality installation and commissioning
Ongoing support, remote monitoring, and maintenance
Whether you need a simple fixed system or a fully automated, scalable solution, Neutron Energy Control delivers reliable, efficient power factor correction tailored to your facility.