Conservation Corner – July 2025

Power Resilience Savings

Home Battery Storage Systems

Home battery storage systems are changing the way homeowners use and manage electricity. Whether or not a home has solar panels, battery systems can provide a way to store electricity for later, offering benefits like backup power during outages, demand charge savings, and greater energy independence.

At their core, home batteries store electricity from the grid or a renewable energy source, such as solar panels, and discharge it when needed. This stored energy can power essential appliances during outages, help reduce electric bills, and support grid stability by limiting demand during high-use hours.

For homes without solar, battery systems are typically used to reduce demand charges or keep the lights on during grid interruptions. For homes with solar, the benefits expand. During the day, excess solar energy can charge the battery. Later, when the sun sets or electricity needs rise, that stored energy can be used instead of drawing from the grid.

Popular battery systems like the Tesla Powerwall, Enphase IQ Battery, and Generac PWRcell are designed for residential use. They typically offer between 10 and 15 kilowatt-hours (kWh) of storage capacity—enough to power essential home loads for several hours. Systems can be scaled up with multiple units to support larger homes or longer backup times.

One major appeal of home battery storage is resilience. In areas prone to outages from storms, wildfires, or an aging grid, batteries can keep critical loads like refrigerators, medical equipment, and Wi-Fi running. Many systems automatically switch to backup mode within seconds of detecting power loss, providing peace of mind and comfort.

Cost remains a factor, however. Financial incentives like the federal Investment Tax Credit (ITC)—which currently covers 30% of the cost—can significantly reduce out-of-pocket expenses. Traditional fossil fuel generators are much cheaper but produce exhaust, noise, and heat, and aren’t typically used often.

Home battery storage systems are not just about emergency power; they’re about control. They allow homeowners to choose when and how they use electricity, support sustainability goals, and make homes more self-reliant.

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Charlie DeSalvo, Energy Efficiency Specialist

If you have any questions about energy efficiency, email Charlie DeSalvo or call (509) 526-4041.