Emergency Power Solutions For Commercial and Industrial Facilities
Reliable emergency backup power solutions to protect operations, ensure safety, and meet compliance.
Whether it’s planned maintenance or an unexpected utility failure, your facility needs a dependable emergency power solution. ESL’s manual transfer switches and emergency connection equipment provide safe, code-compliant backup solutions that keep your operations running without compromise.
Why Emergency Power?
Downtime isn’t just inconvenient—it’s expensive, unsafe, and potentially non-compliant. From life-sustaining equipment in healthcare settings to critical systems in industrial facilities, the need for uninterrupted power is essential.
Reliable emergency backup power helps you:
- Avoid operational disruptions and lost revenue
- Meet NFPA, NEC, and local emergency preparedness requirements
- Protect sensitive equipment and preserve data integrity
- Ensure the safety and comfort of staff, residents, or tenants
Explore how our custom emergency power solutions can be tailored to your facility.
ESL Emergency Power Products
We manufacture UL/cUL 1008 Listed manual transfer switches and related equipment designed for rapid deployment, safe operation, and long-term durability.
Our lineup includes:
Manual Transfer Switch – StormSwitch®
StormSwitch is a manual transfer switch that is UL/cUL 1008 Listed to 3000A and provides an economical commercial solution for businesses that want to be prepared for emergency power loss. Equipped with safety-interlocks and color-coded cam-style receptacles, ESL’s patented StormSwitch ensures a safe and simple hook-up to a portable power generator during a power outage.
3-Way Manual Transfer Switch – TripleSwitch®
Our 3-way manual transfer switches range up to 3000A and are UL/cUL 1008 Listed. ESL’s TripleSwitch uses three interlocked disconnects to isolate standby generator circuits during COPS (Critical Operation Power Systems) load bank testing. The unique design also provides a quick, safe method to connect to a portable generator for redundant backup power
Dual Purpose Docking Station – DualConnect™
For emergency backup system designs with either multiple or existing generators, ESL’s UL 1008 Listed DualConnect™ – Dual Purpose Docking Station (DPDS) provides the flexibility needed to meet your design criteria. ESL’s Dual Purpose Docking Station offers the ability to connect a load bank and portable generator at the same time and is UL 1008 Listed from 400A – 5000A.
Automatic Transfer Switch with Cams – ReadyConnect™
ESL’s ReadyConnect™ Automatic Transfer Switch (ATS) with Cams is UL/cUL Listed pending from 30A-400A and available up to 1200A. ReadyConnect provides the ability to proactively connect back-up power before planned outages. This ensures maintenance workers are not required to be on site for power to be switched from one source to another and then restored.
Portable Generator Connection Box – TempTap™
ESL’s generator connection boxes are UL/cUL 1008 Listed up to 3200A. TempTap inlet boxes provide end users with a safe and simple solution to connect a portable generator to a facility with an existing manual or automatic transfer switch. Once installed by a licensed electrician, temporary connection to a portable generator is easy with color-coded cam-style receptacles.
Outlet Distribution Unit – OutTap™
ESL’s outlet distribution units range up to 5000A and are simple pass-through boxes that are mounted to the exterior of a building and wired to an existing power source. These boxes can be designed with or without a breaker based on your facility needs, and provide operators with color-coded female cam-style receptacles to ensure a quick and safe connection.
All ESL products are engineered with a focus on safety, reliability, and user-friendly operation—ensuring no compromises in performance or compliance. Looking for technical specs or examples? Browse our full Emergency Power Product Catalog for a deeper look at available configurations.
Don’t Let the Next Outage Catch You Off Guard
Power failures risk more than downtime — they threaten safety, compliance, and your bottom line. ESL’s emergency power solutions are built to keep critical operations running when it matters most.
Code Compliance Without the Red Tape
Navigating emergency power code requirements can be complex. ESL designs every solution to help your project pass inspection the first time—minimizing risk, ensuring safety, and keeping timelines on track.
Our solutions are built to meet or exceed common regulatory standards such as:
- NFPA 70 (NEC)
- NFPA 110
- UL 1008 Transfer Equipment Standards
- OSHPD Seismic Certification (OSP)
For peace of mind and inspection-readiness, ESL offers clear labeling, test provisions, and integrated safety features.
Why Emergency Power with ESL?
A proven power partner—trusted where it matters most.
With decades of experience, ESL has delivered critical power solutions to thousands of facilities across North America. Our systems are designed to perform when lives, data, and infrastructure depend on them.
A solution built for performance, not shortcuts.
From rugged construction to intuitive safety features, every ESL product is made to simplify testing, reduce maintenance, and meet the demands of real-world emergencies. We engineer with the end-user in mind—because that’s who it matters to most.
A team that knows emergency power isn’t optional.
From healthcare environments to large-scale infrastructure, our team understands the operational and compliance pressures facilities face. Whether you’re planning new construction or upgrading existing systems, we’re here to help you get it right.
Frequently Asked Questions
Emergency power provides backup electricity during a utility outage to ensure critical systems remain operational. A complete emergency power system typically includes manual or automatic transfer switches, generators, and associated distribution equipment.
Facilities like hospitals, data centers, and public buildings are required by code to maintain power to life-safety systems, critical operations, and essential infrastructure during an outage. Emergency power ensures compliance, safety, and uninterrupted operation.
The right solution depends on your facility’s size, power requirements, compliance obligations, and operational priorities. ESL offers guidance during the planning and specification process to ensure you select the right components—whether for new construction, retrofits, or expanding capacity.
Yes. ESL designs and manufactures both standard and custom configurations tailored to site-specific requirements. We work closely with engineers and facility teams to deliver solutions that meet operational and compliance needs.
Keep Critical Systems Online Without the Headaches
Whether you’re planning ahead or responding to an urgent need, ESL delivers reliable, code-compliant emergency power solutions—backed by expert support from spec to install.
ESL Complies with NFPA’s NEC® 700.3 (F) provision for legally required systems. Click to Learn More
