1   Why you need a generator?
Today's homes are equipped with the latest appliances, home theater, home office and security systems. Today's businesses depend on electricity to drive the state-of-the-art equipment that helps run their daily operations. We are too dependent on electricity to go without it for hours, let alone days or weeks.
But all of these power-sensitive devices stop working and your home or business shuts down when the electricity suddenly goes off. Since you never know when the next power failure will strike, make sure your home or business always has the electricity you need with a backup generator.

2   How to choose a generator?
Generators are usually chosen based on their maximum and rated power. One must calculate what the total load will be in order to effectively choose the proper generator. Some appliances and equipment require a higher starting wattage and then it tapers.
Rule of thumb is to take the running wattage and multiply by 3 unless the appliance or equipment is under a constant load such as light bulbs.
You can also contact the dealer for detail and professional suggestions, we would like to offer you the best tailor made power solutions.

3   What is a power factor?
The power factor (pf) is typically defined as the ratio between kilowatts (kW) and kilovolt amps (kVa) that is drawn from an electrical load, as was discussed in the question above in more detail.  It is determined by the generators connected load. The pf on the nameplate of a generator relates the kVa to the kW rating (see formula above). Generators with higher power factors more efficiently transfer energy to the connected load, while generators with a lower power factor are not as efficient and result in increased power costs. The standard power factor for a three phase generator is 0.8.

4   What is the difference between standby, continuous, and prime power ratings?
Standby power generators are most often used in emergency situations, such as during a power outage. It is ideal for applications that have another reliable continuous power source like utility power. It’s recommend usage is most often only for the duration of a power outage and regular testing and maintenance.
Prime power ratings can be defined as having an “unlimited run time”, or essentially a generator that will be used as a primary power source and not just for standby or backup power. A prime power rated generator can supply power in a situation where there is no utility source, as is often the case in industrial applications like mining or oil & gas operations located in remote areas where the grid is not accessible.  
Continuous power is similar to prime power but has a base load rating. It can supply power continuously to a constant load, but does not have the ability to handle overload conditions or work as well with variable loads. The main difference between a prime and continuous rating is that prime power gensets are set to have maximum power available at a variable load for an unlimited number of hours, and they generally include a 10% or so overload capability for short durations.

5   Can a generator I am looking at parallel with one I already own?
Generator sets can be paralleled for either redundancy or capacity requirements. Paralleling generators allows you to electrically join them to combine their power output.  Paralleling identical generators will not be problematic but some extensive thought should go into the overall design based on the primary purpose of your system. If you are trying to parallel unlike generators the design and installation can be more complex and you must keep in mind the effects of engine configuration, generator design, and regulator design.