Standby Generator in Portland

You need power when it counts, and Southern Maine Electric Inc. is here to deliver it. We’re a family-owned, mobile electrical service team that serves Portland residents and businesses. Whether it’s a cold snap or a coastal storm, we’re ready to install or maintain your standby generator so your power doesn’t skip a beat.

When the power goes out, we keep your comfort on. For service you can trust, contact our team at (207) 423-5443 today.

Install a Standby Generator

What Size Standby Generator Do You Need?

Choosing the right size generator is a matter of knowing what your home or business will need to maintain power during an outage. An undersized unit won’t keep up, and one that’s too big may waste energy or cost more than necessary. We’ll help you figure out the best fit based on your priorities and property.

Size ranges include:

• 10 to 12 kW: Suitable for small homes with basic backup needs
• 14 to 20 kW: Covers most household essentials, including central AC
• 22 to 27 kW: Ideal for larger homes or small businesses
• 30 to 50+ kW: Designed for commercial properties with high energy loads

We’ll walk you through your options and make sure you’re covered without overcommitting.

What Appliances or Systems Should a Backup Generator Cover?

Not everything needs to run during an outage, but some things absolutely do. Focus on your essentials: the systems you need to stay safe, comfortable, and productive.

You’ll want to maintain power for your heating or cooling system, refrigerator and freezer, medical devices, lighting, internet, and any work-from-home equipment. For businesses, you should add point-of-sale systems, security systems, and systems that maintain climate-sensitive inventory.

What Happens if You Overload Your Generator?

Overloading a standby generator can cause it to shut down or trip its circuit protection. When the unit is asked to supply more electricity than it’s rated for, essential systems may stop functioning properly. Continuous strain can also damage the engine and electrical components over time.

To prevent this, it’s important to select the right system size and prioritize which circuits or appliances you need during an outage. Properly managing the load ensures your power source operates reliably, maintains optimal performance, and protects your equipment from unnecessary wear and malfunction.

Southern Maine Electric Inc.'s Full Suite of Standby Generator Services

Our team works closely with you from the initial conversation through to long-term support. We assess your needs, help you choose the right system, and ensure you’re fully set up for reliable backup power.

Our services include:

• System sizing and consultation
• Generator installation
• Automatic transfer switch setup
• Routine generator maintenance
• Fuel source integration
• Remote monitoring solutions
• Generator diagnostics and testing
• Generator repairs and parts replacement

Do Standby Generators Turn on Automatically During an Outage?

Standby generators are designed to turn on automatically when the power goes out. An automatic transfer switch monitors the electrical supply and signals the system to start as soon as an outage is detected. Within seconds, power is restored to your selected systems. Once utility service returns, the switch transfers the load back and powers down the generator. The entire process happens automatically, so there’s no need for manual intervention during an emergency.

How To Prepare Your Standby Generator for an Incoming Outage

The best way to get the most out of your generator is to prepare it before an outage hits. Like any machine, standby generators perform better and last longer with proper care. That includes testing it regularly, keeping fuel levels in check, and making sure the surrounding area is clear.

With proper preparation, many standby generators can run for days without interruption. We’ll show you how to keep yours ready, so when the power fails, your generator kicks in without hesitation. Routine maintenance and readiness checks go a long way toward system longevity.

How Often Should You Schedule Generator Maintenance?

Scheduling generator maintenance is essential for keeping it reliable and operational. Most units should be inspected every 6 to 12 months, depending on usage and manufacturer guidelines. Routine service includes checking oil and fluid levels, testing the battery, inspecting the transfer switch, and examining electrical connections.

These checks help ensure the generator runs efficiently during an outage and reduce the risk of unexpected problems. Scheduling servicing with a licensed professional extends the life of your system, maintains peak performance, and protects your investment, giving you confidence that your backup power will work whenever you need it.

How Often Should You Run Your Generator in Preparation?

To keep a standby generator ready for an outage, it’s important to run it regularly. Most manufacturers recommend operating the unit for 15 to 30 minutes every month. This allows the engine to reach normal operating temperature, circulate oil, and charge the battery. Running the generator also helps identify any potential issues before a real power loss occurs. For frequent users or larger systems, slightly longer or more frequent test runs may be beneficial.

How Long Does Standby Generator Installation Take?

The installation of a standby generator typically takes one to two days for most residential properties. This timeframe includes preparing the site, connecting the generator to your electrical system, and installing the automatic transfer switch. Larger or more complex installations, such as commercial properties or homes with extensive electrical systems, may require additional time for permitting and inspections. Working with a licensed professional ensures the installation is safe, code-compliant, and completed efficiently.

Do You Need a Permit for Standby Generator Installation in Portland?

Standby generator installations in Portland require permits to ensure compliance with local building and electrical codes. This typically includes a building permit for the installation, an electrical permit for wiring and connections, and any necessary approvals for fuel lines or propane hookups.

Our licensed team handles all paperwork, coordinates inspections, and ensures your system complies with city regulations. By handling the permitting process for you, we guarantee your generator is installed safely, legally, and is ready to provide reliable backup power whenever you need it.

Get Expert Help With All Your Standby Generator Needs

From repairs to upgrades to full installations, Southern Maine Electric Inc. handles every aspect of standby generator service. We’ll guide you through the decision-making process, provide clean installations, and deliver responsive maintenance no matter the weather. We proudly serve all of Maine and New Hampshire with licensed mobile service.

Looking for a standby generator in Portland? Contact us at (207) 423-5443.