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How to Pick the Best Generator for Your Home or Business

Written by Claudia Morales. Published 29/01/2025

Table of contents: 

  1. Introduction​
  2. 1. Understanding Generator Types and Their Uses
    1. 1.1. Standby Generators (Whole-House Generators)
    2. 1.2. Portable Generators
    3. 1.3. Inverter Generators
  3. 2. What Size Generator Do You Need?
  4. 3. Generator Costs: What You Need to Know
    1. 3.1. What is the average cost of installing a whole house generator?
    2. 3.2. Are generators expensive to run?
  5. 4. Generator Safety & Maintenance
    1. 4.1. How long do generators last?
    2. 4.2. Can a generator run all day?
    3. 4.3. Can a generator run in the rain?
    4. 4.4. Can you sleep with a generator on?
    5. 4.5. How loud is a generator?
  6. Shop Generators at Clarkes of Cavan
  7. Why Buy from Clarkes of Cavan?

Introduction​

Power outages can be inconvenient, costly, and even dangerous, leaving homes and businesses without essential electricity for hours or even days. Whether you need backup power for your household appliances, heating systems, or business operations, choosing the right generator is crucial. If you’re wondering what size generator can power a house in Ireland, how much it costs to install a whole-house generator, or how long generators last, this guide has the answers. We’ll also cover key considerations like fuel types, noise levels, running costs, and safety tips to help you find the best generator for your needs.

Let’s explore everything you need to know about home and business generators so you can make an informed decision and ensure uninterrupted power when it matters most.

🔍 Need help choosing the right size generator? Use our Generator Calculator to find your perfect match!

1. Understanding Generator Types and Their Uses

Choosing the right generator depends on what you need to power. Some are designed for occasional backup, while others can supply an entire home or business with uninterrupted electricity.

1.1. Standby Generators (Whole-House Generators)

A standby generator is a permanent backup power solution that automatically starts during an outage. It’s ideal for homeowners and businesses that need uninterrupted power for essential appliances, heating systems, or commercial operations.

Best For: Homes, offices, shops, farms, and industrial use.

Pros: Automatic operation, seamless power, high capacity. Cons: Higher upfront cost, requires installation.  Check out: Honda EU70is 7KVA Generator – A powerful 7KVA unit perfect for home and business backup power.

1.2. Portable Generators

Portable generators are versatile, fuel powered units that can provide temporary power for homes, worksites, and outdoor events. They require manual operation and refueling but are more affordable and flexible than standby models.

Best For: Home emergency backup, construction sites, events.

Pros: Affordable, easy to transport, no permanent installation. Cons: Limited capacity, requires manual start and refueling.

Draper Petrol Inverter Generator – 2300W – A quiet and fuel-efficient option ideal for home backup or worksite use.Loncin LC2000i Inverter Generator – A compact and reliable 2000W generator for small power needs.

1.3. Inverter Generators

Inverter generators provide stable, clean power for sensitive electronics like laptops, medical devices, and home appliances. They’re quieter and more fuel efficient than traditional portable generators.

Best For: Camping, caravans, backup power for small homes.

Pros: Lightweight, low noise, ideal for sensitive devices. Cons: Lower power output than conventional generators.      Best Choice: Honda EU22i 2.2KVA Inverter Generator , One of the quietest and most efficient inverter generators on the market.

2. What Size Generator Do You Need?

One of the most common questions is: What size generator do I need to power my home or business?

Basic power (lights, fridge, small appliances) 5,000 – 7,500W Mid-range power (heating, water pumps, larger appliances) 7,500 – 10,000W Whole-house backup (heating, AC, electric cooking, all appliances)  10,000W+

🔍 Need help choosing the right size generator? Use our Generator Calculator to find your perfect match!

🔍 Need help choosing the right size generator? Use our Generator Calculator to find your perfect match!
 
 
For whole-house backup: Honda EU70is 7KVA Generator     For essential appliances: Draper Petrol Inverter Generator – 2300W

3. Generator Costs: What You Need to Know

3.1. What is the average cost of installing a whole house generator?

What is the average cost of installing a whole-house generator?  Generator unit cost: €3,000–€12,000 Installation cost: €1,500–€5,000 Total estimated cost: €4,500–€17,000

3.2. Are generators expensive to run?

 Are generators expensive to run?  Petrol Generators: €2–€3 per hour. Diesel Generators: €1.50–€2.50 per hour (more fuel-efficient). LPG Generators: Can be cheaper with bulk gas supply.

4. Generator Safety & Maintenance

4.1. How long do generators last?

Portable generators: 1,000–3,000 hours (~10 years).

Standby generators: 10,000–30,000 hours (~20+ years).

4.2. Can a generator run all day?

Portable generators need breaks every 6–12 hours.

Standby generators can run continuously with maintenance.

4.3. Can a generator run in the rain?

No, unless covered by a weatherproof enclosure.

4.4. Can you sleep with a generator on?

Yes, but only if placed outdoors with proper ventilation.

4.5. How loud is a generator?

Portable generators: 65–90 dB (vacuum cleaner level).

Inverter generators: 50–65 dB (whisper-quiet).

Shop Generators at Clarkes of Cavan

At Clarkes of Cavan, we understand how important it is to have reliable backup power when you need it most. Whether you're preparing for power outages, running equipment on a job site, or looking for an energy solution for your home or business, we have a wide range of standby, portable, and inverter generators to suit every need.

We stock top brands like Honda, DraperJefferson , and Loncin, ensuring you get high-quality, durable, and fuel-efficient generators that won’t let you down. Not sure which generator is right for you? Our team of expert advisors is ready to help you select the best model based on your power needs and budget.

Why Buy from Clarkes of Cavan?

Wide Selection – From compact inverter generators to high-capacity standby units.
Expert Advice – Our team is here to help you find the best solution for your home or business.
Competitive Prices – High-quality generators at great value.
Click & Collect Available – Order online and pick up at your convenience.
Fast Nationwide Delivery – Get your generator delivered straight to your door.

Find Your Perfect Generator Today

Don’t wait until the next power outage be prepared with a high performance generator from Clarkes of Cavan. Explore our full range online or visit us in-store to speak with one of our experts.

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