Please be advised that all Manufacturer’s instructions, User manuals and Installation Guides take precedence over all and any of the tips listed below.
The information provided is merely intended to serve as a tip to the generator purchasing. UnitedGenerator.com cannot be held liable for any experience that deviates from what is listed below.
Q: What is the process I will have to go through to get a generator installed and ready for back-up?
A: The generator process typically involves:
- Site Survey by a licensed electrician which includes a wattage calculation
- Selection of Generator
- Architectural drawing/ permit
- Natural/LP Gas Installation
- Delivery of unit and placement of panel (this may be done before the gas source has been installed.)
- Electrical Installation
Q: What should I consider when choosing a generator?
A: Get a generator that is rated for the amount of power that you can determine you will need.Look at the labels on lighting, appliances, and equipment you plan to connect to the generator to determine the amount of power that will be needed to operate the equipment. Choose a generator that produces more power than will be drawn by the combination of lighting, appliances and equipment you plan to connect, including the initial surge to the generator when it is turned on. Surge is the wattage or amperage required to get an electric motor started from a dead stop which can be 1 1/2 to 5 times the running wattage requirements. The running wattage and starting/surge wattage is usually displayed on a data plate on the electric motor. We also have a wattage estimator on our web site available for your review that has common wattage requirements listed for appliances, tools and motors. Sizing Estimator
Q: How much outdoor space do I need for the generator?
A: Make sure you have adequate safe space outdoors to run the generator. In order to provide proper ventilation, some generators require 3-5’ distance on all sides of the generator – check your generator manual for specifics.
Q: Is there someone that can help me decide what generator I need?
A: If you cannot determine any of the above call an electrician familiar with generators and ask for a site survey – an electrician will be able to help you make these determinations. You may also use our Sizing Estimator which contains wattage estimates for many common household appliances; including AC units, tools, refrigerators and even pressure washers.
Q: What is included with the generator?
A: It is important to find out what does and does not come with the generator you are purchasing e.g. Transfer switch, composite pad (if not, cement slab may need to be poured, which may require a building permit being pulled), battery etc.
Q: Will there be any other costs that I might incur?
A: Other than the cost of the generator, additional costs that you may incur include:
- Installation cost
- Gas or liquid propane cost
- Generator Shipping cost
- Delivery Truck added lift gate cost. This is a hydraulic platform used to lower heavy generators to the ground when customers do not have a delivery dock or fork lift.
- Battery cost
- Permit fees
- Architectural drawings (if necessary)
Generators come with an installation or owners manual. Be sure to always make reference to the manual if you have any doubts.
Q: How long does a generator take to install?
A: It takes approximately eight to ten hours to install a standby generator. Pre-packaged pre-wired units may take less. This would be subject to a site survey. Installation includes engine break-in and initial oil and filter change.
Q: Does a generator need maintenance?
A: Depending on how often power goes out the engine oil and filter will need to be changed once per year or more.
Technical:
Q: What is the difference between running watts and starting watts?
A: Running watts are the continuous watts needed to keep items running. Starting watts, are extra watts needed for two or three seconds to start motor-driven products like a refrigerator or AC unit.
Q: How can I determine the running or the starting watt requirement for a tool or appliance?
A: First check the data plate on the tool appliance, if the running watts are not listed. You may use this equation:
Watts = Volts X Amps
Transfer switches allow switching from a primary power source to a secondary or proprietary power source. Most often transfer switches can be seen where emergency power generators are used to back up power from the utility source when there is a power failure. The transfer switch allows switching from utility power to emergency generator power. The switch is either a manual switch, an automatic switch or a combination of manual and automatic. A manual transfer switch is designed for portable generators. An automatic transfer switch is designed for permanently installed home backup systems. During a power outage, the transfer switches isolate the emergency circuits from the utility line allowing for efficient operation of the generator without back feeding electricity onto the utility.
Why put transfer switches on generators?
The most safe and convenient way to run a generator is with a transfer switch. These switches should only be installed by a qualified electrician. Transfer switches have three selections. Generator on ...center off...and utility on. Transfer switches prevent you from having the generator and the utility power on at the same time. Which would mess up the wiring in your home, damage your appliances and generator. When installed properly they will prevent a back feed to the utility lines which could prove fatal to a lineman working on the power lines. The utility transformer is a step down into your home but becomes a step up when fed the other way.
Power inlet boxes are perfect for connecting your portable generator to your transfer switch. You basically install the box just like an external power outlet, just connect it to your transfer switch. When the power goes out, simply start your generator and plug it into the outlet.
Break Before Make Transfer Switch
A Break Before Make transfer switch breaks contact with one source of power before it makes contact with another. It prevents back feeding from an emergency generator back into the utility line. One example is an open transition Automatic Transfer Switch (ATS). During the split second of the power transfer the flow of electricity is interrupted.
Closed Transition Transfer Switch (CTTS)
Provides seamless transfer switching in less than 1/2 cycle.
Soft-loading Transfer Switch (SLTS)
An SLTS essentially uses CTTS technology but actively changes the amount of load accepted by the generator.
Providing Power to the Powerless™ 
