Generator Sizing Tool

generator sizing tool

Generator Sizing for Home Use

» Essential Load Generator Sizing Calculator

Essential loads are the specific circuits to be powered during a utility outage. An essential load solution keeps you protected and secure, powering only those loads you designate as most important.

» Whole House Generator Sizing Calculator

Calculate the total load of your home for whole house protection. Find out how a load management* solution can keep you comfortable while saving you money!

What size generator do I need? I want to power my whole house, but I don't want to spend a fortune doing it! What options are there for whole and partial house automatic standby generators? This article will address those questions and get you started towards a better understanding of the issues surrounding standby generator sizing. Our approach is based upon the National Electric Code and local municipalities may vary—ask an Assurance Power Systems expert to help size your South Florida residential generator system!

Sizing a generator can be a daunting and dangerous task for the typical homeowner. Assurance Power Systems specializes in designing and installing standby generator packages to meet the diverse needs of South Florida homeowners. There are three basic approaches to sizing an automatic standby generator: 1) whole house protection, 2) whole house protection with automatic load sensing, and 3) partial house protection. Our GenSizer™ tool can assist you with sizing your generator for all of these approaches.

Whole House Protection

Whole house protection is for those homeowners who want uninterrupted backup power with the ability to power all loads simultaneously. This is—naturally—the most expensive option, but it does give you peace of mind that you will live without interruptions in the event of a power outage. Sizing a generator for whole house protection involves calculating all general loads, motor and low power factor loads, and heating and cooling loads. Other factors to consider for whole house protection are fuel supply and spacial constraints. You need to ensure you have adequate space to meet local setback requirements, as well as space for fuel storage if you don't have access to a natural gas service line.

Whole House Protection with Automatic Load Sensing

Whole house protection with automatic load management is quickly becoming the ultimate residential standby generator system solution, and many of the leading generator manufacturers now offer fantastic value propositions. Automatic load management technology monitors the output of the generator’s lower priority loads until the generator output is able to handle these loads. This new technology maximizes the homeowners’ investment and allows them to power more with less!

For example, many houses that would require a 35kW or even a 45kW generator can be powered with a 20kW generator or smaller! Not only is the total installation cost roughly 30% less than a whole house solution, but operating costs are significantly lowered since the smaller generators burn much less fuel (approximately two gallons of propane vapor per hour versus four gallons per hour). With the plethora of new standby generator products on the market, Assurance Power Systems can customize a managed whole house solution for your South Florida home or business that will be sure to exceed your needs and fit your budget.

Partial House Protection

Partial house generator systems are the most affordable solutions, but limit your protected circuits to a dedicated emergency panel. The codes surrounding these installations are very strict because it is assumed that the dedicated emergency circuits will be running simultaneously and, therefore, the generator must be sized properly to handle all loads at once. This is contrary to whole house and managed whole house solutions where the National Electric Code allows for discounts because the loads are not all being used simultaneously.

There are several variables involved when it comes to designing and installing an automatic home standby generator system. Generator installations should ONLY be performed by trained professionals! Assurance Power Systems has installed thousands of standby generators across South Florida neighborhoods, including Boca Raton, West Palm Beach, Delray Beach, Fort Lauderdale and more. We are there for our customers every step of the way, from the design phase all the way through the preventative maintenance and upkeep of their chosen generator system. Call Assurance Power Systems TODAY at 877.499.9500 and find out how we can customize the ultimate generator solution for you!

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Note: The results of the tool are not valid without the signature of a representative of Assurance Power Systems.

*Load System: This is the process of managing loads so the generator won't overload the output rating of the generator.