Long Island’s
Generac Certified Dealer
Professional generator installation, service, and maintenance across Nassau and Suffolk Counties.
Generator Service, Warranty & Maintenance
IllumiGEN provides comprehensive Generac generator service across Long Island, from routine maintenance to emergency repairs.
Whether we installed your system or another dealer did, our factory-trained technicians keep your generator running at peak performance.
Scheduled Maintenance:
Annual and semi-annual service plans to keep your system ready when you need it.
Repairs & Diagnostics:
Fast, accurate troubleshooting from certified Generac technicians. Same-day service available.
Warranty Support:
We handle standard warranty claims and offer extended warranty plans on new and existing Generac units.
Maintenance Contracts:
Lock in priority service with a maintenance agreement. Includes annual inspections, load testing, and oil and filter changes.
Remote Monitoring:
We proactively monitor your generator’s status through Generac’s Mobile Link, so we know about issues before you do.
Generator Rentals & Temporary Hookups:
Need temporary power for an event, construction site, or while your permanent system is being installed? IllumiGEN provides portable generator rentals with professional hookup and removal.
Residential
Generator Installation
A Generac whole-home standby generator turns on automatically within seconds of a power outage, keeping your lights, refrigerator, HVAC, and critical systems running without interruption.
IllumiGEN handles every step of the process: site assessment, system sizing, permitting, professional installation, and activation. We work with Nassau and Suffolk County municipalities daily and know the local codes inside and outside.
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We evaluate your home’s electrical load, fuel source, and placement options to recommend the right system.
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From essential-circuit coverage to whole-home backup, we size your generator to match your needs and budget.
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We handle all municipal permits and utility coordination with PSEG Long Island.v
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Our licensed electricians install your system to code, with clean wiring and a proper concrete pad.
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We test the full system, set up Mobile Link monitoring, and walk you through everything.
Discover our Generators
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Standby Generator Generac
AC Standby Generators — The standard whole-home solution. Provides direct power to your home’s electrical system when utility power goes out. Turns on automatically and runs on natural gas or propane.
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PWRcell Generac
DC Generators — Designed to recharge battery storage systems in homes with self-sustained energy setups. Ideal for homeowners with a PWRcell or other battery backup who want generator-level resilience.
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Portable Generators
Portable Generators are a flexible option for temporary or targeted backup power. IllumiGEN carries portable Generac units and can advise on the right model for your needs.
Commercial
Generator Installation
For Long Island businesses, a commercial standby generator isn’t a luxury; it’s a necessity. IllumiGEN installs and services Generac commercial generators up to 150kW, protecting operations of every size.
We work with restaurants, medical offices, retail locations, property managers, and multi-tenant facilities across Nassau and Suffolk Counties. Every installation includes load analysis, code-compliant wiring, and a dedicated project manager from start to finish.
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Automatic standby generators up to 150kW, designed to keep your business running without interruption during an outage.
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Purpose-built for commercial applications with higher duty cycles. Ideal for facilities that need reliable, continuous backup power beyond standard residential units.
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Single-phase and three-phase configurations available for businesses with heavier electrical demands — including manufacturing, medical facilities, and large commercial properties.
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Business standby systems include automatic transfer switches that detect an outage and start your generator within seconds, no manual intervention required.
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Lock in priority service with a commercial maintenance agreement. Includes scheduled inspections, load testing, and preferred response times.
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When critical systems go down, our team responds fast. Same-day emergency service available for commercial accounts across Nassau and Suffolk Counties.
Smart Generator Technology
Every Generac system IllumiGEN installs comes with Wi-Fi connectivity and Mobile Link integration, giving you and our service team real-time visibility into your generator’s status from anywhere.
Mobile Link monitors your system 24/7 and sends alerts for maintenance needs, utility power status, and system activity. It also gives our technicians the ability to diagnose issues remotely — often resolving problems before a service call is even needed.
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Real-time status updates on your phone, tablet, or computer.
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Instant notifications for power outages, maintenance reminders, and system events.
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IllumiGEN sees what your generator sees, so we can act fast when something needs attention.
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Prioritization technology evaluates your energy consumption to maximize efficiency during an outage.
Generac PWRcell &
Energy Storage
Backup power is just the beginning. The Generac PWRcell is a fully integrated energy storage system that lets you capture, store, and manage energy on your own terms — reducing your reliance on the grid and lowering utility costs.
A single PWRcell battery delivers up to 9kW of continuous backup power, enough to run essential systems or an entire home. Pair it with a generator for a complete home energy ecosystem that keeps you protected and lowers your utility costs.
IllumiGEN is a certified Generac PWRcell installer, and one of the only companies on Long Island qualified to design and install these systems. We handle the full process: system design, electrical integration, permitting, and activation.
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Start with what you need today and expand as your energy demands grow. The PWRcell system is modular, so you can add battery capacity over time without replacing your existing setup.
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Pair your PWRcell with a Generac generator and grid power for multiple layers of energy security. If one source goes down, the others keep your home running.
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PWRcell stores energy during off-peak hours when rates are lower, then uses that stored energy during peak times when electricity costs more. Over time, this adds up to meaningful savings on your utility bill.
Frequently Asked Questions
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Generac recommends servicing your generator at least once a year, or every 200 hours of use — whichever comes first. An annual maintenance visit typically includes an oil and filter change, spark plug inspection, battery check, and a full load test. IllumiGEN offers maintenance contracts that keep your system on schedule so you never have to think about it.
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The right size depends on your home’s electrical load — specifically, which systems you want to keep running during an outage. A typical Long Island home needs between 14kW and 26kW for whole-home coverage. IllumiGEN provides a free on-site assessment to calculate your exact needs, so you get the right system without overpaying.
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Yes. Generator installations on Long Island require electrical and building permits from your local municipality. Setback requirements and noise regulations vary by town. IllumiGEN handles the full permitting process for every installation — we know the local codes and work with municipal offices regularly to keep your project on track.
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Absolutely. You are not required to use the dealer that originally installed your generator. IllumiGEN services all Generac models regardless of who did the installation. Switching is simple — just call us to schedule your first service visit and we’ll take it from there.
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A typical residential installation takes one to two days once permits are approved. The full timeline from assessment to activation is usually two to four weeks, depending on equipment availability and your municipality’s permit processing time. IllumiGEN manages the entire process and keeps you informed at every step
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A standby generator is permanently installed outside your home and turns on automatically when the power goes out — you don’t have to do anything. A portable generator requires manual setup, fuel management, and extension cords, and can only power a few appliances at a time. For reliable whole-home backup, a standby generator is the professional-grade solution.
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Yes. We partner with Synchrony to offer 0% financing options on residential generator installations and other qualifying projects. Prequalification is quick and won’t affect your credit score. We also help customers take advantage of available rebates and incentives through NYSERDA and PSEG Long Island.
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Your Generac standby generator detects the outage within seconds and starts automatically through an automatic transfer switch. It supplies power to your home until utility power is restored, then shuts itself off. The entire process happens whether you’re home or not. With Mobile Link, you’ll also receive a notification on your phone so you always know your status.