Generators and inverters both provide backup power during outages, but they work differently, and there are pros and cons to each. Choosing one or the other for emergency lighting depends on your specific needs.
Understanding How Generators and Inverters Work
Generators and inverters serve the fundamental purpose of providing power during outages, but they operate in significantly different ways. Generators convert mechanical energy into electrical energy through combustion engines. They typically run on fuels such as gas or diesel. When the engine runs, it turns an alternator, which produces electrical power.
In contrast, inverters do not generate power on their own. Instead, they convert direct current (DC) from a battery or solar panel into alternating current (AC), which is the standard form for household appliances.
Key Features
Several key features influence how generators and inverters perform during power emergencies.
- Power Capacity - Generators offer higher power output, making them suitable for running multiple lights and appliances simultaneously. Inverters are usually better suited for smaller loads.
- Output Stability and Efficiency - Generators produce a fixed output that does not adapt to the demand. They may also produce power surges, which can damage sensitive electronics. Inverters can adjust their energy output based on demand and typically give a stable output without spikes.
- Noise Level - Generators can be noisy, which in many settings might be disruptive. Inverters are typically much quieter.
- Refueling Needs - Generators need fuel to keep running. Inverters, connected to a battery bank, do not need constant refueling but do need to have their batteries charged.
- Run Time - For buildings required by code to have emergency lighting, the NFPA codes require that power sources for emergency illumination must be able to operate for at least 90 minutes.
Generators can run for a long time provided they are given enough fuel. The run time for inverters depends on their battery capacity. - Physical Aspects - Generators are typically bulkier and are built to withstand tough conditions. They do require regular maintenance. Inverters are smaller and easier to move and to store. They have fewer moving parts than generators, so they may wear out less.
- Emissions - Generators rely on combustion engines and therefore produce emissions. They can be used to power indoor appliances but the generators themselves should not be indoors while running. Inverters do not generate emissions and are therefore a "cleaner" option.
Making the Right Choice for Reliable Emergency Illumination
In general, emergency lighting inverters are ideal for localized, low-power needs, while generators are better for large-scale, multi-system backup during extended outages.
Many facilties use a hybrid approach, such as inverters for emergency lighting and generators for standby loads.
The setup you choose must always meet code requirements and ensure safety.
By carefully evaluating all the factors, you can make an informed decision that ensures reliable and efficient emergency lighting. We'll be glad to help. Contact us!
