Stay Open When the Grid Goes Down.
For Oahu businesses, an outage isn’t just an inconvenience — it’s lost revenue, spoiled inventory (restaurants, medical), and unhappy customers. A properly sized commercial backup generator keeps you operating through HECO disruptions, weather events, and load-shedding rotations.
Sparky and Sons installs commercial backup generators from 22kW (small office or restaurant) up to 150kW+ (multi-tenant or larger facility) — Generac, Kohler, Cummins, Caterpillar. We size based on actual operating loads, coordinate the gas-line tie-in, install the automatic transfer switch, and handle commercial permitting.
For medical offices, restaurants with refrigeration, and any business with critical IT loads, this is one of the highest-priority infrastructure investments you can make.
What’s Included
Every commercial backup generator job covers the same scope — here’s exactly what you’re getting when you book us.
How It Works
Four steps from first call to written warranty. No surprises along the way.
Load Study
Meter your actual operating loads over a representative week.
Spec & Quote
Right-size the generator, write the commercial quote with full equipment list.
Permit & Order
Pull commercial permits, order generator (lead times 4–12 weeks).
Install & Commission
Pad, generator, ATS, gas line, test under simulated outage. Document.
Why Sparky
Right-Sized
Real load metering means your generator runs your actual business, with reasonable headroom.
Service Contracts
Annual maintenance keeps the generator ready when you need it most.
Permitted & Inspected
Commercial permits, code-current install, signed-off documentation.
Frequently Asked Questions
How do I size a commercial generator?
Diesel, propane, or natural gas?
How long is generator lead time?
Do I need a service contract?
Get a Free Commercial Backup Generator Quote
Written estimate on the first visit. No surprise charges, no salesman act — just a licensed electrician answering your questions.
Ready to Get Started?
Contact Sparky and Sons LLC today for a free, no-obligation estimate. We look forward to working with you.