1. Generator Power Ratings: Here's What You Should Know

    When you consider purchasing a generator, the first thing you should think about is the intended use of it. It may be easy to find out how much power is required for an application by using a generator power calculator available online but there are several factors to consider before purchasing a generator such as a generator’s engine power ratings and what do they mean.

    The guidelines set in this article explains the proper application of generator drive engines in AC Generator Set installations.

    Standby Power Rating

    Standby power rated generators are the most common rated generator sets. Their primary application is to supply emergency power for a limited duration during a power outage. With standby rated generators there is no overload capability built into the units. It is important to note that standby rated generators, under no circumstances, should run in conjunction with a public utility source.

    Standby power rating should be applied to the unit where public utility power is available. The typical rating for a standby engine should be sized for a maximum of 80% average load factor and roughly 200 hours per year. This includes less than 25 hours per year of running time at the standby rating. Standby power ratings should never be applied except in true emergency outage situations. Manual load shifts for testing purposes can be performed with most automatic transfer switches.

    Prime Power Rating

    Prime power rated generators should be used in applications where the user does not purchase power from a public utility. Prime power applications fall under two distinct categories:

    Indefinite Running Time

    The prime power rating is the maximum power accessible at the variable load for an unlimited number of hours per year in a variable load setting. It is not advisable that the variable load exceed 70% average of the prime power rating during any operational p

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  2. What is an Inverter Generator ?

    What is an Inverter Generator?

    In a few words, it is a generator that can safely power sensitive electronic devices. They produce clean and stable energy in comparison to traditional generators.

    How Do Inverter Generators Work?

    To understand how they work, you first need to understand the inverter. Where traditional generators use a heavy alternator, inverter generators use a lightweight digital electronic alternator – the inverter.

    The inverter generator produces pure sine wave power. It simply means that you get power as clean as what get from the mains power outlets at home. The generator produces DC power, then the inverter inverts and converts DC power to a steady flow of clean AC power.



    The first and biggest selling point of an inverter is its ability to produce clean power - free from spikes that might damage sensitive devices. This makes the inverter generator a safe power source for sensitive equipment such as home appliances, smartphones, and more.

    Secondly, another advantage of an inverter generator is the design. The inverter technology allows manufacturers to design compact, lightweight portable generators that are perfect for caravanning, 4WD touring and camping. The size of an inverter generator can be up to half the size of the conventional generators

    Inverter generators also offer greater fuel efficiency compared to conventional models because its engine speed automatically adjusts in direct proportion to the load, which means it maximizes the fuel efficiency while maintaining 240V supply. This means it has a longer continuous running time and you do not need to refuel frequently.

    Lastly, i

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  3. How to Choose a Water Pump?

    How to choose a water pump?

    The question we at Garpen are often asked is what sort of pump should I buy?

    There are so many options but to boil down what's the right water pump for you is to first know the intended use of it. How do you intend to use the pump? Is it for fire fighting, water transfer, perhaps to fill a 1,000 litre pod, or to transfer chemical or contaminated water? Depending on the application, you can then decide which material type of water pump is right for the application, and then the drive power type, water pressure, and so on.

    Water pumps can be classified according to their application, material type, and fuel type. To help you with your buying decision, we're going to go through the types of water pumps.


    Water Pumps By Application

    Fire Fighting Pumps

    Water Transfer Pumps

    Chemical Pumps

    Trash Pumps

    Submersible Pumps


    Fire Fighting Pumps

    Fire Fighting pumps are versatile in they can be used for fighting fires but also transferring volumes of water. There are two types of firefighter pumps, Single Impeller and Twin Impeller. A twin Impeller is a high pressure and has less water flow volume than a single impeller. Put simply you can squirt water further with a twin impeller than a single impeller. This is because the higher pressure is put out. The engine-driven is not reliant on electricity which could disappear at any moment in a fire. Fire Fighter pumps are available in diesel and petrol engines at Garpen.

    Water Transfer Pumps

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