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Safe, Reliable, and Professional Standby Generator Solutions

A sudden blackout is more than just an inconvenience—it can be incredibly stressful. Within hours, a major power outage can lead to spoiled food, frozen pipes, failed sump pumps, and a completely uncomfortable home.



At Holtzclaw Electric, we eliminate the anxiety of severe weather and unreliable grid infrastructure. Based right here in Marion, IL, we design and install professional home standby generators that detect power failures instantly. When the utility power drops, your generator kicks on automatically, keeping your lights bright, your HVAC running, and your family safe.

Perfect Sizing & Code-Compliant Electrical Integration

A backup generator is only as reliable as the electrical installation behind it. We take a careful, engineering-first approach to protect your investment:

1. Precise Load Calculations

We calculate your home's actual power demands (including heavy loads like AC units and water heaters) to ensure your new generator is perfectly sized to carry the load.

2. Seamless Automatic Transfer

We configure high-quality automatic transfer switches that transition power cleanly from the grid to the generator within seconds of a blackout—completely hands-free.

3. Strict Local Compliance

We handle all permitting, local Marion electrical codes, and utility hookup requirements safely and legally.

Installation, Preventative Maintenance, & Diagnostics

Whether you need a brand-new standby unit seamlessly integrated into your home's electrical panel or your existing system serviced before storm season, we handle it all with precision:



  • Residential Generator Installation: Sizing and mounting permanent home standby generators, installing automatic transfer switches (ATS), and performing all structural wiring.
  • Preventative System Maintenance: Testing battery charges, changing oil and filters, checking electrical output, and running diagnostic self-tests to ensure your unit is 100% ready for the next storm.
  • Diagnostic Troubleshooting & Repairs: Quickly fixing failed starter motors, control board errors, fuel delivery problems, or system warning lights.
  • Manual Transfer Switches: Installing manual transfer panels for homeowners who prefer to back up select, critical circuits using portable generators.

Never Worry About a Blackout Again

Storm season is always right around the corner. Contact Southern Illinois' favorite local electrical and generator experts today to secure a reliable backup power supply for your family.