Battery Backup Generator

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Battery Backup Generator Installation in Fairfax, VA & Northern Virginia

Power outages in Northern Virginia are a fact of life — summer thunderstorms, ice storms, and grid instability from the region's rapidly growing electrical demand mean that the question for most Fairfax-area homeowners is not whether the power will go out, but what happens when it does. Rojas Electric installs home backup power systems throughout Fairfax, VA, and all of Northern Virginia: battery backup systems that provide silent, automatic power for your critical circuits, and generator transfer switch solutions for homeowners who prefer traditional generator backup.

Our primary recommendation for most Northern Virginia homeowners is a battery backup system — modern battery technology from manufacturers like EcoFlow provides reliable, silent, automatic backup power without fuel, exhaust, or noise. For homeowners who need high-output backup for extended outages, we install generator transfer switches and interlock kits that safely connect a portable or standby generator to your home's electrical system. Whatever approach fits your home and goals, Rojas Electric handles the complete electrical installation.

Backup Power Services We Offer in Fairfax, VA & Northern Virginia

Battery Backup System Installation

We install whole-home and partial-home battery backup systems including EcoFlow and other modern battery platforms. Battery backup is silent, requires no fuel, starts automatically during an outage, and integrates with Span smart panels for intelligent circuit-level backup management.

Span Smart Panel Integration for Backup Power

When paired with a Span smart panel, battery backup becomes significantly more powerful — you can configure exactly which circuits receive battery power during an outage and monitor battery status in real time from your smartphone.

Portable Generator Transfer Switch Installation

A manual transfer switch or generator interlock kit allows you to safely connect your portable generator to your home's electrical panel during an outage — without backfeeding the utility grid, which is both dangerous and illegal.

Automatic Transfer Switch Installation

An automatic transfer switch detects a power outage and automatically transfers your home's electrical load to a connected generator or battery system without manual intervention.

Generator Interlock Kit Installation

A cost-effective alternative to a full transfer switch for homeowners with portable generators. We install listed interlock kits that prevent the main breaker and generator breaker from being on simultaneously — a critical safety requirement.

Generator Wiring & Connection

We install the inlet box, connect the generator cord, run any necessary conduit, and make all electrical connections between your generator and home panel — correctly and to code.

Our Backup Power Installation Process in Fairfax, VA & Northern Virginia

1

Backup Needs Assessment

We start by understanding what you need to power during an outage and for how long. Refrigerator and internet for a few hours? Full home including HVAC for extended outages? The answer determines whether battery, generator, or a combination is right for your home.

2

System Recommendation & Sizing

We recommend a backup system sized correctly for your actual needs — not oversized to increase project cost. Battery systems are sized in kilowatt-hours of storage. Generator capacity is rated in kilowatts of continuous output.

3

Permit & Scheduling

Backup power system installations require Fairfax County electrical permits. We handle the application and schedule all required inspections.

4

Complete Installation

We install the transfer switch or interlock kit, connect the battery or generator system to your panel, run any required conduit, and make all connections safely and to code.

5

System Test & Walkthrough

We test the backup system — simulating an outage to confirm automatic transfer for battery and ATS systems, or walking you through manual transfer for interlock systems — and leave you confident in operating your backup power.

FAQs:

Battery Backup Generator Installation in Fairfax, VA & Northern Virginia

For most Fairfax County homeowners, a battery backup system is the better solution for the outages Northern Virginia actually experiences — short to medium outages from summer storms typically lasting a few hours to a day. Battery systems are silent, start automatically, require no fuel, and have no exhaust. Generators provide higher output and indefinite runtime with fuel, making them better for extended outages or homes with very high electrical loads.
Battery backup system installation costs vary based on system capacity and whether a Span smart panel is included. A basic partial-home battery backup system typically runs $3,000 to $8,000 installed. Whole-home battery backup with Span smart panel integration runs $8,000 to $15,000 or more depending on storage capacity. Generator transfer switch installations run $500 to $2,000.
Runtime depends entirely on the battery capacity and the loads you are running. An EcoFlow system powering a refrigerator, internet router, phone charging, and a few lights might run 12 to 24 hours or more. Running air conditioning shortens runtime significantly. With a Span smart panel, you configure which circuits receive battery power — extending runtime by shedding non-essential loads automatically.
Yes. Fairfax County requires an electrical permit for generator transfer switch and interlock kit installations. Unpermitted generator connections are a code violation and create safety and insurance risks. Rojas Electric handles all permitting for backup power installations.
EV charging during a grid outage is generally not recommended — EV chargers draw significant power that would rapidly deplete a typical home battery system. With a Span smart panel, you can configure your EV charger circuit to be disabled during outages automatically, preserving battery capacity for essential loads.
A generator interlock kit is a mechanical device installed on your electrical panel that prevents the main utility breaker and the generator breaker from being on simultaneously — which would backfeed dangerous voltage onto the utility grid, potentially injuring utility workers. Listed interlock kits are a code-compliant alternative to a full transfer switch for homeowners with portable generators.
You can run your whole home on battery backup for a limited time, but central air conditioning and electric water heaters draw so much power that even large battery systems deplete quickly. The practical approach is to configure your Span smart panel to power only the circuits you need most during an outage — refrigerator, internet, lighting, and phone charging — while shedding high-draw appliances.
A portable generator must never be plugged directly into a wall outlet or connected to your home's wiring without a properly listed transfer switch or interlock kit — doing so backfeeds the utility grid and can electrocute utility workers. The generator must be operated outdoors, at least 20 feet from any doors, windows, or vents — carbon monoxide poisoning from indoor generator use is a serious and unfortunately common cause of storm-related fatalities. A properly installed interlock kit from Rojas Electric makes generator use safe and code-compliant.
We install the electrical components of standby generator systems — transfer switches, wiring, and panel connections. Standby generator installation also involves gas line work and foundation preparation coordinated with the generator supplier or a plumber as appropriate. We handle the complete electrical scope and coordinate with other trades when needed.
Yes. Battery backup systems can be installed with a standard electrical panel using a sub-panel backup configuration connecting the battery system to a dedicated sub-panel serving your critical circuits. A Span smart panel provides more flexibility and intelligence, but is not required.

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