General Information, Important Notice | Siemens Standby Generators

Generator Sizing Guide

General Information

Important Notice

This booklet is designed to familiarize estimators and installers with proper sizing guidelines for residential and commercial generators. The information is not comprehensive, nor does it replace or supercede any material contained in any of

the written documents shipped with the equipment. This booklet should only be used in conjunction with the Owner’s Manual, Installation Manual and other technical documents shipped with each product. Always read all accompanying documentation carefully before attempting to install any generator, transfer switch or related equipment.

How to Use this Booklet

Within this booklet, you will find electrical load information, plus an outline of generator surge capability, fuel pipe sizing, liquid propane tank sizing, and UPS / generator compatibility. The final pages are perforated for easy removal and can be photocopied to create additional Onsite Estimating Sheets for use with individual jobs.

Safety Information

Proper sizing of the generator is crucial to the success of any installation and requires a good working knowledge of electricity and its characteristics, as well as the varying requirements of the electrical equipment comprising the load. When analyzing the electrical load, consult the manufacturer’s nameplate on each major appliance or piece of equipment

to determine its starting and running requirements in terms of watts, amps and voltage. When choosing the generator output for commercial or industrial applications, select a rating that is approximately 25% higher than the peak load (for example, if the load is about 40 kilowatts, select a 50 kW genset). A higher rated generator will operate comfortably at approximately 80% of its full capacity and will provide a margin of flexibility if the load increases in the future.

For safety reasons, Siemens recommends that the backup power system be installed, serviced and repaired by a Generac Authorized Service Dealer or a competent, qualified electrician or installation technician who is familiar with applicable codes, standards and regulations.

It is essential to comply with all regulations established by the Occupational Safety and Health Administration (OSHA) and strict adherence to all local, state and national codes is mandatory. Before selecting a generator, check for municipal ordinances that may dictate requirements regarding placement of the unit (setback from building and/or lot line), electrical wiring, gas piping, fuel storage (for liquid propane or diesel tanks), sound and exhaust emissions.

If you have a technical question regarding sizing or installation, contact Siemens Technical Service Center toll free at 800-844-0029 during normal business hours (8 a.m. to 5 p.m. CST).

Standby Generators specifications

Siemens Standby Generators provide reliable power solutions for both residential and commercial applications, ensuring that homes and businesses remain operational during power outages. These generators stand out due to their advanced engineering, innovative technology, and robust design, making them a preferred choice for those seeking uninterrupted power.

One of the primary features of Siemens standby generators is their automatic transfer switch (ATS) capability. This technology allows for seamless switching from the utility power source to the generator within seconds of a power outage. The ATS continuously monitors the incoming utility power and activates the generator when it detects an interruption. This ensures that critical appliances and systems remain functional without manual intervention.

In terms of performance, Siemens generators are equipped with continuous power ratings that cater to varying power needs. Whether it’s an essential load or a full-scale home or commercial operation, these generators can handle the demands efficiently. Most models come with powerful engines, designed for durability and longevity, ensuring they can operate under heavy loads without compromising performance.

Siemens also employs advanced noise reduction technologies in their standby generators, which significantly reduce operational noise levels. This feature is particularly beneficial for residential areas where noise compliance is essential. Additionally, the generators are engineered with vibration dampening systems, enhancing user comfort and ensuring minimal disturbance to the surrounding environment.

The fuel efficiency of Siemens generators is another remarkable characteristic. Many models utilize propane or natural gas, allowing for cleaner and more sustainable operation compared to traditional diesel generators. These fuel types not only reduce emissions but also lower operational costs over time, making Siemens generators a more economical choice for long-term power solutions.

Moreover, Siemens generators are designed with user-friendly interfaces and smart monitoring systems. Users can track generator performance, maintenance schedules, and fuel levels through digital displays or smartphone applications. This connectivity allows for proactive maintenance, reducing the risk of unexpected failures and ensuring that the generator remains in optimal working condition.

In summary, Siemens Standby Generators combine reliability, efficiency, and advanced technology to deliver unparalleled performance during power outages. With features such as automatic transfer switches, low noise operation, fuel efficiency, and smart monitoring, they provide users with peace of mind and a steady power supply whenever needed. Whether for residential or commercial use, Siemens generators are a trusted solution for maintaining essential services and comfort in the face of power interruptions.