★★★★★
“Fantastic from start to finish. 19 sockets, bathroom fans and more — they barely left a mark in the house. Polite, professional and lovely to have in my home. Would absolutely recommend anytime.”
// Generator & Backup Systems //
Generator & Backup Power Systems in Cork
Diesel generator installation, automatic transfer switches, and UPS backup power systems for Cork businesses — correctly sized, installed, and certified.
★★★★★
4.8 · 64 Reviews
·
RECI Registered·Fully Insured
// About This Service //
Cork’s Generator & Backup Power Specialists
Haven Electrical install backup generator systems and uninterruptible power supplies (UPS) for businesses across Cork City and County. Power outages are costly — for a food processing facility in Ringaskiddy, a data centre in Cork city, or a care home in Carrigaline, maintaining power during a grid outage isn’t optional. We carry out the full electrical installation: changeover switchgear, generator connections, earthing and bonding, load testing, and certification. We work with generator suppliers across Cork and can advise on generator sizing, fuel management, and maintenance requirements. All generator electrical work is carried out by RECI-registered electricians.
Correct Generator Sizing
We assess your critical loads and specify the correct generator size — neither under-sized nor over-specified.
Automatic Transfer Switching
ATS panels detect mains failure and automatically start and connect the generator within seconds.
RECI Certified Installation
All generator and backup power electrical work certified by RECI-registered electricians on completion.
Full Load Testing
Every generator installation load-tested under real operating conditions before sign-off.
// What You Get //
What’s Included in a Generator & Backup Power Installation
Critical load assessment
We assess your critical electrical loads to correctly specify generator size and transfer switch capacity.
Automatic transfer switch (ATS) installation
ATS panel monitors incoming mains supply and triggers generator start and changeover on supply failure.
Generator supply cabling
Heavy-duty cabling from generator to transfer switch panel, sized for full load capacity.
Earthing and bonding
Correct generator earthing system designed and installed — essential for safety and equipment protection.
UPS system installation
Uninterruptible power supplies for critical equipment where even a brief transfer delay isn’t acceptable.
Fuel management provisions
Fuel tank connections, day tank provisions, and fuel monitoring systems installed as required.
Load bank testing
Generator load-tested at full rated capacity before handover to verify correct operation.
Maintenance bypass provisions
Isolation and maintenance bypass arrangements for safe generator servicing without loss of power.
RECI installation certificate
Full electrical installation certificate issued on completion.
// SIMPLE PROCESS //
How It Works
1
Fill In The Form
Takes less than 60 seconds. Tell us about your job and where you’re based in Cork.
2
Send Us Photos or a Video
We’ll send you a WhatsApp message so you can show us the job. Helps us give you an accurate quote without a wasted visit.
3
Get Your Quote & Book In
We’ll come back to you within 24 hours with a price. Agree a day and time that suits you — we’ll be there.
// Why Choose Haven //
Get a Free Quote
Why Cork Businesses Choose Haven Electrical
Sizing Expertise
An undersized generator fails at the critical moment. An oversized one wastes capital. We carry out proper load assessments to get the sizing right.
Safety First
Generator installations involve high-energy systems that require correct earthing, isolation, and protection. We don’t cut corners on any of it.
Fast ATS Response
Our ATS panel designs typically achieve mains-to-generator transfer in under 10 seconds, minimising disruption to operations.
Ongoing Support
We offer maintenance contracts for generator systems we install — regular servicing, load tests, and priority call-out for reactive issues.
// Customer Reviews //
What Cork Customers Say
★★★★★
“We’re so pleased with the service from Haven Electrical Limited. Everything was handled quickly and efficiently, from the prompt replies to getting us scheduled in right away. The technician Caoilte was professional, friendly, and a pleasure to work with.”
★★★★★
“Sent an email for a quote on Monday. Had a phone call Tuesday morning and had Haven call Thursday! Very happy with the turn around, highly recommend. Very clear on prices and affordable for those small jobs around the house. Will definitely use again!”
// FAQs //
Generator & Backup Power FAQs
Generator sizing is based on the total electrical load of the circuits you need to support during a mains failure. This isn’t simply the sum of all your circuit breakers — it requires a proper assessment of actual running loads, motor starting currents, power factor, and any non-linear loads such as UPS systems or variable speed drives. We carry out a full load assessment before specifying a generator. Getting the sizing wrong in either direction is an expensive mistake.
An automatic transfer switch (ATS) monitors the incoming mains supply and automatically starts the generator and transfers the load when it detects a supply failure. Without an ATS, someone has to manually start the generator and operate the changeover switch — which means your premises is dark until someone gets there. For most commercial and industrial applications, an ATS is essential. We design and install ATS panels to suit your generator capacity and load requirements.
A typical diesel generator requires 10–30 seconds to start from cold, warm up, and stabilise before it can accept load. With a correctly specified ATS, the total transfer time from mains failure to generator supply is typically 10–20 seconds for most commercial installations. For equipment that cannot tolerate any supply interruption (servers, life-safety systems), a UPS (uninterruptible power supply) bridges the gap during generator start-up.
A UPS (uninterruptible power supply) provides instantaneous battery-backed power the moment mains supply is lost — with no transfer delay. For critical equipment like servers, control systems, or life-safety systems, the 10–20 second generator start-up time can cause problems. The UPS bridges this gap, holding the critical loads on battery until the generator is running. Most robust backup power designs for critical applications combine UPS systems with a generator.
A standby generator may require planning permission depending on its size, noise output, fuel storage capacity, and location. External generators are generally considered development. We advise customers to check with Cork City or County Council on their specific installation before proceeding. We can provide the technical information you need for a planning submission. Smaller internal generators or those within an existing plant room are often exempt.
Generator earthing is critical for both safety and equipment protection. An incorrectly earthed generator can create dangerous touch voltages on equipment casings, damage sensitive electronics, and cause nuisance tripping of RCDs. The correct earthing approach depends on whether the generator is operating as a TN, TT, or IT system, and how the neutral is handled at the transfer switch. We design the earthing arrangement correctly for each installation — it’s not something to improvise.
Yes — we offer maintenance contracts for generator electrical systems we install. This covers regular testing of the ATS, inspection of electrical connections, load bank testing of the generator, and checking fuel levels and battery condition on auto-start systems. Generator manufacturers typically recommend at least annual maintenance and a monthly no-load test run. We’ll put a maintenance plan in place as part of the handover.
Yes — we regularly upgrade and extend existing generator and backup power systems. Common upgrade projects include fitting ATS panels to existing manual changeover installations, upgrading undersized generators, extending the generator to cover additional circuits, and replacing aging UPS systems. We assess the existing installation and design the upgrade to integrate correctly with what’s there.
// Related Services //
Related Commercial Services
Emergency Lighting
Emergency lighting systems for Cork commercial premises. Battery-backed, IS 3217 compliant.
Learn More →
Maintenance Contracts
Planned and reactive electrical maintenance for Cork businesses. Keeps your backup systems serviced and reliable.
Learn More →
Factory & Plant Wiring
Three-phase industrial electrical wiring for Cork factories and manufacturing plants.
Learn More →
// Free Quote //
Get Your Free Generator & Backup Power Quote
Free load assessment · Fixed price · RECI certified
Get in Touch
021 203 2045
Unit 5, Carrigaline Industrial Estate,
Co Cork
Co Cork
★ 4.8 Google Rating · 64 Reviews
✓ Safe Electric Registered
🏆 All-Ireland Business All-Star