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March 4, 2026
One minute you're cooking dinner or wrapping up a Zoom call, and the next thing you know, the lights go out and the house goes quiet. From summer storms to overloaded grids, power outages aren’t rare anymore—they’re just part of life. That’s why more homeowners are turning to reliable home battery solutions to stay powered up when the unexpected hits.
This guide covers everything you need to know about power outage protection, from understanding what a home battery is and how it can help, to choosing the right one.
A backup battery is an energy storage system designed to keep your home’s essential appliances and devices running when the grid goes down. Unlike a portable generator, a battery stores electricity—either from the grid, solar panels, or both—and delivers it instantly and silently during an outage.
Here’s how a home battery works:
A home battery can provide reliable outage protection and peace of mind, without the noise, fumes, or fuel of a gas generator.
Plus, if you have solar, you can pair it with a battery to store more of your own electricity, making your home more energy independent while saving you money on your electric bill.
If you live in an area with frequent outages, extreme weather, or rising electricity costs, a backup battery can safeguard your comfort, safety, and daily routines.
Here’s how to decide if one is right for you, and what to consider before investing.
Before shopping for backup options, get familiar with how much energy your home consumes. Make a list of what absolutely needs backup power if there’s an outage.
For example, you may consider some common essentials:
For added comfort, you might include some auxiliary appliances and devices:
Anything you need or want powered, add it to the list to more accurately evaluate your power usage.
Once you have some idea of how much your backup battery will support, it’ll be easier to narrow down your options. Most battery systems are rated in kilowatt-hours (kWh), which indicates how much energy they can store. The more energy-hungry your setup (think HVAC units, refrigerators, or multiple freezers), the higher the storage you'll need.
A high-capacity battery, like the Tesla Powerwall 3 or Franklin WH, can usually keep essential appliances running for two or three days. With additional backup batteries, you can support a greater number of appliances or increase your runtime—and if you have solar, you can expect an even longer runtime, as your solar system will continue to charge up your backup battery, even during an outage.
With a clear outline of your needs and preferences, an installer, such as Treehouse, can design the best system for you and your setup. They’ll review details with you and make recommendations on what to back up, based on your budget and concerns. After a solid plan is in place, your installer will evaluate your power usage needs, make necessary calculations, and design your system, so you can rest assured your power needs are properly supported during an outage.
Hardware and install costs
Once you know your needs, it’s time to compare pricing, including any incentives and financing. To start, batteries with a professional install typically cost around $1,500 per kilowatt-hour (kWh). With a high-capacity battery like the Tesla Powerwall 3 (13.5 kWh) or Lunar System (15 kWh), that would mean a total investment in the estimated range of $20,000 to $23,000. Not only does pricing depend on which battery you choose (and how many), every home is different, so the cost of installation also depends on factors such as the length of the wire run, and other electrical work required to ensure your panel can handle the additional load. An expert installer can help you determine which battery is best suited for you given your budget and what the all-in cost might be for installation in your home.
Rebates and incentives
While the initial sticker price of a battery can seem significant, there are several generous tax credits and utility rebates available to reduce the upfront cost of your system. These incentives can make premium batteries much more cost-effective investments.
At the federal level, while Congress ended the ability for homeowners to claim the 30% federal tax credit after 2025, the good news is that there are financing providers that can still claim the tax credit on your behalf and pass the savings directly to you—meaning you can still get 20-30% off the cost of your battery without dealing with any tax paperwork.
Here's how it works: because of how federal tax law treats commercial entities differently than homeowners, these financing partners can claim the credit on systems they own and lease to you. They handle all the tax filings, and you get the savings applied directly to your upfront price. No waiting until tax season, no forms to fill out—just immediate savings on day one.
For even more savings, you can also look into what incentives your state or utility offers. A few of the largest programs include:
An experienced battery installer, such as Treehouse, knows the ins-and-outs of these programs and will identify all the rebates you might qualify for.
Financing
Finally, on top of incentives, you may want to look into your financing options to help make the remaining cost of a battery more manageable. On top of traditional loans with fixed terms and APRs, you can also consider leasing your battery system (instead of owning it), which means you’d only pay a low monthly payment and have no down payment or upfront cost. These monthly lease options often come with great warranty and maintenance coverage, making them especially attractive to many homeowners.
Ultimately, you want to make sure to choose an installer who has an extensive range of financing options available, so you can select the best one for your preferences and financial situation. Treehouse has several financing partners that offer traditional home improvement loans, prepaid leases and monthly leases, giving you maximum choice flexibility.
A battery isn't just a backup plan for the next outage — it's part of a broader shift toward electrifying your home. Many homeowners who start with a battery eventually add solar panels, an EV charger, a heat pump, or an induction cooktop. Each of those additions draws more power from your electrical system, and a well-chosen battery can help you manage that growing demand.
When evaluating systems, think about what's coming next for your home, not just what you need today. If solar is on your radar, make sure the battery you choose is compatible with a solar array. If you're considering an EV, factor in the additional load that a Level 2 charger will put on your panel. Planning for these additions upfront can save you from costly retrofits down the road.
You should also consider how easily your system can scale. Some battery brands offer modular units that let you add storage capacity over time without replacing your entire setup — a smart option if your needs are likely to grow but you're not ready to invest in a larger system right away.
Choosing the right battery backup solution isn’t just about picking the biggest battery you can find. As we discussed in the previous section, it’s wise to match the system to your home’s unique power needs, budget, and future plans. But what specific features play into these areas, and what should you look for?
Below are a few things to consider when evaluating backup battery solutions.
If you find the evaluation process intimidating, that’s totally understandable—you don’t need to be the expert. You can discuss all of these factors with an expert installer and they’ll help you evaluate your needs and get the right system for your home and setup.
Yes. Adding a backup battery to your home isn't just a plug-and-play operation—it requires smart integration with your current power system.
Modern battery systems include automatic switching equipment that seamlessly transitions your home to battery power during outages, protecting your system and ensuring backup kicks in when needed. It's always best to work with a licensed electrician who can safely configure your system, balance your electrical load, and ensure everything works together properly.
It's important to consider your home's electrical capacity. When charging, the battery draws power from your electrical service—potentially a significant load. Some homes may need an electrical service upgrade to support this additional demand, especially if your current service is already close to capacity. While this is an additional investment, it protects your home and loved ones from fire risks and other electrical hazards.
That's why it's important to verify that your total electrical load, including battery charging, doesn't exceed your home's available electrical service capacity.
We’ve covered a lot on how to evaluate your power usage and choose a backup battery system based on your needs, but you might still have a few more questions about how a backup battery might benefit your home and how to go about getting one, since it can be a significant investment.
Here are a few of the most common questions homeowners have about home backup battery solutions.
With a backup battery, you can keep your internet and smart devices running, alongside anything else you deem essential. You can get a battery system that can handle light loads, like your router, modem, and key smart home components, and these draw relatively low power. Other appliances like a heater, A/C, dryer and EV charger draw much more power, so if you want to keep those running too, you’ll need a battery system with more power and capacity.
A qualified installer will help you understand the right backup battery to keep the devices you want running. The best battery systems take less than a second to kick on during a power outage so you’ll hardly notice the interruption in electricity.
Absolutely. You can configure a backup battery to keep outlets in your home powered, so your devices can keep charging without a hitch. We recommend putting together a list of whatever may require backup power in your home so you can then work with a professional installer to evaluate your energy usage needs and land on the right size of a backup battery to suit those needs.
Battery systems can often help you save money by storing energy during off-peak hours and using it when rates are high. Plus, certain batteries offer insights into your power consumption, making it easier to manage your electricity bills over time.
To do this, you can use the time of use (TOU) mode on certain batteries to:
Optimizing your energy usage with the TOU mode can save you quite a few bucks over time.
If you have solar, you can save even more—think hundreds of dollars a month on your electric bills. You can do this by setting your battery to “self consumption” mode to maximize use of stored solar energy and minimize grid power usage. So, instead of just letting extra solar energy go to waste, you can store it in your battery and use it during peak hours to avoid pulling from the grid at all, maximizing your savings.
Battery runtime depends on what you’re powering and the system’s battery capacity. Most homeowners choose a setup that supports powering essential needs like Wi-Fi, lighting, and refrigeration for 24 hours up to a few days with proper sizing and load management.
High-quality systems are built to last 10–15 years or more. But to get even more mileage out of your battery, look for products with proven track records and transparent performance guarantees to ensure long-term value. Many options already have extensive hardware warranties of 10 years or more, but your installer can help you understand the warranty details of each system you are considering.
There’s no such thing as a one-size-fits-all home backup power solution because every home is different with varying priorities and power needs. For some homeowners, affordability is most important, while for others the battery’s backup power and capacity is.
No matter what’s most important to you, Treehouse can help you navigate the landscape of modern home batteries and ensure your next backup power solution perfectly fits your home and needs.
Schedule a free consultation with one of Treehouse’s battery experts to explore your options and get a free quote customized for your home.