What Are Electrical Backup Power?

Electrical backup power are electrical power sources that serve as the secondary source of power to the primary source which is normally the electric utility company power. When the primary source fails, the secondary or backup power takes over through an automatic transfer switch. This article will present only the best of electrical backup power out there in the market.

Do not confuse electrical backup power with uninterrupted power supply. These are two systems that could be interconnected but serve two different purpose. While the backup system provides temporary power to the loads when the primary is out, it does take several seconds to start and be online to provide power.

Uninterrupted power supplies however provide instantaneous and immediate power to the load as it is always connected directly to the load.

Duro Star Diesel Generator

DuroStar DS10000EH 10000 Watt Portable Electric Start Dual Fuel Generator

Applications: The Best Of Electrical Backup Power

The following are just a few of the many applications of electrical backup power.

  • Hospitals
  • Military bases
  • Police departments
  • Hotels
  • Universities
  • Ocean going vessels
  • Manufacturing plants
  • Power plants
  • Mining sites
  • Deep sea diving platforms
  • Oil Rigs

The Different Forms Of Back Up Power

Depending upon the type of equipment and facility that we would like to provide continuous power to, there are many options for what type of backup power to choose from.

In large power requirements such us whole buildings or compounds as hospitals, hotels, universities, military bases, ships and whole cities etc we normally find large diesel generators serving as back up or emergency power sources. These generators are automatically started using batteries or compressed air upon failure of the primary power source.

Battery banks are still for the most part used for limited power backups or for limited time duration of several hours. Nowadays however, with the advent of huge and powerful battery set ups and configurations, we can use batteries as the main source of power and no longer just the back up. Indeed it is now our choice to use batteries as our main source of power or just the back up power.

Gasoline, Diesel Or Propane Fuel Backup Power

For the following products below, please Click on the photos or links below the photos to read more about them.  They can be purchased directly through these links.

1) Champion 7500-Watt Dual Fuel Portable Generator with Electric Start.

At 9375 starting watts and 7500 running watts on gasoline and 8400 starting watts and 6750 running watts on propane, trust Volt Guard built-in surge protector to prevent overloads.

Champion 7500 Running Watts Dual Fuel Generator
2) 20 kW Portable Generator – Deep Sea Controller – 120/240V 60 Hz – 3PH – Diesel – IP65.

Product is available from Amazon by clicking at the photo or link below.

20 kilowatt diesel generator

20 kW Portable Generator – DeepSea Controller – 120/240V 60 Hz – 3PH – Diesel – IP65

3) Briggs & Stratton 76107 25kW Home Standby Generator System with Dual 200 Amp/Split 400 Amp Automatic Transfer Switch, Gray
4) DuroMax XP12000E 12000W Portable Gas Electric Start Generator
The Best Of Electrical Backup Power

DuroMax XP12000E 12000W Portable Gas Electric Start Generator

5) Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator
Generac Electrical Backup Power

Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator

6) Cat RP7500E Gas Powered Portable Generator with Electric Start – 7500 Running Watts/9375 Starting Watts 490-6491
CAT 7500 Running Watts Gasoline Generator

Cat RP7500E Gas Powered Portable Generator with Electric Start – 7500 Running Watts/9375 Starting Watts 490-6491

Thank you all so much for stopping by  and leaving a comment. Your comments will be responded to.

Joe Joson


Matthew · November 1, 2018 at 8:19 am

If there were no backup generators there would be a lot of places in trouble like hospitals, military bases, and oil rigs like you said but surely they are causing more harm than good to the environment, especially the diesel ones?

I’m no expert but there must be a way in this day and age to not lose power at all than have to wait for the backup generator to kick in?

I used to work on building sites and these generators were the lifeline of the site so if they were out of action then nothing got done.

I’m actually surprised at the price of them, I thought they would be a lot more expensive as they are lifesavers in a way,aren’t they?

    Joe · November 1, 2018 at 8:40 pm

    Thanks for stopping by and dropping off your comments and question Matthew! Yes we are now just beginning to have the option not to use smoke-belching diesel generators for backup power! 

    The rapid advancement in battery technology, the continuous drop in prices, help to speed up the transition process for facilities and home owners to batteries. For the most part we are still using the good old reliable diesel generators but the transition is now happening.

    Elon Musk’s Tesla Inc leads the pack with their Powerwall and Powerpack batteries and many more are rising up to compete. The market will increasingly be carrying more manufacturers and we hope to see prices of batteries go down. Solar power setups nowadays have the option to add some amount of battery storage. This system can be adjusted and designed to determine how long the backup battery power will support in terms of hours or even days depending on the load being supported.

    Joe Joson

Chris · November 6, 2018 at 12:52 pm

Several years ago I helped a friend set up a building business and even built a website for him – they were a group of 5 builders and they grew from strength to strength. I helped them out with labouring on their building site in the early days and these generators were an absolute must to their work – they were near enough their lifeline in bad weather. 

Out of all the backups you’ve listed above, which would you say is the best fit for a modern day building site?

BEazzy Shifts · November 6, 2018 at 12:56 pm

Nice article and thanks for sharing your recommendations.

I was confused with the difference between uninterruptible power supplies and electrical backup power. I’m cleared now. So Uninterrupted power supply contains batteries. But electrical backup includes generators and but most times contain batteries.

I want to know what the batteries in generators do. Please help me out asap!

    Joe · November 6, 2018 at 7:41 pm

    Hello BEazzy Shifts!

    Thanks for dropping by and leaving your comment and question! Happy to hear that the differences in UPS using batteries and backup or standby generators have cleared up for you! The battery for most generators are used for starting up the engines. 

    Here is a sample starting battery for a portable Champion generator.

    Hope this helped you!

John · November 6, 2018 at 1:09 pm

Hi Joe, thank you for your great article.   You’ve explained the main users of electrical backup power.You’ve also explained the difference with Uninterrupted power supplies, as I know the schools in my city all have these.  I learned a lot about the battery banks, they seem to be the most environmentally friendly solutions in the longer term.  I really like the concept of solar power to help fuel these batteries.Being a solopreneur, I’m not really a customer for such but I learned a lot from options from your great article!

    Joe · November 6, 2018 at 7:26 pm

    Hello John! A great privilege to share a bit of what I have learned about these essential electrical backup and UPS systems. They will come in handy one of these days. We hope never to use it but when the time comes we will all be thankful we had the system to protect our families, friends and communities.

    Thanks for dropping by and sharing us your thoughts on the subject John!


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