Cromtech AVR Generator

What Is an Automatic Voltage Regulator? 

A generator’s alternator produce electrical power, while the automatic voltage regulator continously monitors the output voltage and works to keep it close to the generator’s rated level. When equipment is switched on, the increased load can cause the voltage to momentarily drop. When equipment is switched off, the voltage may briefly rise. The AVR responds by adjusting the alternator’s excitation field to compensate for these changes and stabilise the output. 

The AVR continuously monitors the generator’s output voltage and automatically adjusts the alternator to maintain a stable voltage. The result is a steady voltage level and consistent power delivery, even as loads switch on and off throughout the day. 

It’s important to understand that an AVR regulates voltage, not frequency. In Australia, the generator’s 50Hz output frequency is determined by the engine speed, while the AVR’s role is to maintain a stable output voltage. Both are essential for delivering reliable power, but they perform different functions. 

Why Stable Voltage Matters 

Poor voltage regulation can affect the performance, reliability and service life of equipment powered by a generator. Sensitive equipment such as electronic devices, battery chargers, pumps with electronic controls and modern appliances can be damaged or have their life span shortened by an unstable supply. 

Equipment damage leads to costly downtime, and on commercial jobs an unexpected failure can disrupt operations for everyone on site. The same principle applies at larger scale, which is why voltage regulation is standard across generator sets of every sizethat support sensitive applications.  

The Cromtech AVR Generator Range 

We offer two AVR generators under the Cromtech brand. Both are single-phase units with a digital display showing hours, hertz and voltage, a steel frame with wheels and fold-out handles for moving around site, and a 1-year warranty honoured Australia-wide. 

Cromtech Generator 6.5kW Petrol AVR E-start 

• Maximum output: 6,500 watts (6,000 watts continuous) 

• Engine: Cromtech 4-stroke petrol 

• Starting: Electric start with recoil backup 

• Outlets: 2 x 15 amp, weatherproof (IP66) 

• Protection: RCD and overload protection 

• Fuel tank: 25 litres, approximately 11 hours running at 75% load 

• Noise level: 74 dB at 7 metres 

• Weight: 87 kg, on wheels with fold-out handles 

• Warranty: 1-year Cromtech warranty 

The petrol model is the pick for most users. Its large fuel tank comfortably sees out a full working day without refuelling, and the output covers power tools, site lighting, fridges and general appliances. It suits onsite power for tradies as well as home backup, farms, fetes and markets. 

Cromtech Generator 6.0kW Diesel AVR E-Start 

• Maximum output: 6,000 watts (5,500 watts continuous) 

• Engine: Cromtech  

• Starting: Electric start with recoil backup 

• Outlets: 2 x 15 amp, weatherproof (IP66) 

• Protection: RCD and overload protection 

• Fuel tank: 12.5 litres, approximately 5 hours running at 75% load 

• Weight: 110 kg, on wheels with fold-out handles 

• Warranty: 1-year Cromtech warranty 

The diesel model suits users who prefer diesel for its lower flammability or who already run diesel equipment on the property. It is a popular choice for agriculture, rural properties and construction use. 

Sizing the Right Generator for Your Power Needs 

Add up the rated watts of everything you plan to run at the same time, and allow extra for equipment with electric motors, which draw more power on start-up than they do running. Compare that total against the continuous output figure, not the maximum. Our online Generator Calculator walks you through the process, or talk to our team or your local dealer for advice on your specific requirements.