Solar Battery Backup
- How To Select The Best For Your Home

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Solar battery backup systems have become increasingly popular as homeowners recognize the importance of having a reliable, clean source of energy during power outages and emergencies.

With various types available in today's market, selecting the best option can be overwhelming. This comprehensive guide will provide essential information on understanding solar battery backup systems, crucial factors to consider when making your choice, and our top recommendations for 2023.

Understanding Solar Battery Backup Systems

Solar battery backup systems are essential, as they allow you to store excess energy generated by solar panels, making it available for use during power outages or other times when grid failure might occur.

Importance Of Having One

A solar battery backup system is essential for homeowners considering solar power, as it ensures a consistent and uninterrupted supply of electricity to your home in times of grid outages or generated excess energy during the day.

For example, consider a situation where there's an unexpected power outage due to extreme weather conditions in your neighborhood (our Tucson monsoons, for example!). With a solar battery backup system in place, your household can continue running smoothly without any disruptions, using stored energy from your batteries instead of relying on expensive grid-supplied power (or candles and flashlights!)

Furthermore, you'll be able to avoid rising electricity rates and leverage low-cost solar energy even after the sun goes down, thereby reducing overall energy costs and increasing savings over time.

How Solar Battery Backup Systems Work

Solar battery backup systems work by storing the excess energy generated by your solar panels and supplying it when needed, such as during power outages or periods of low sunlight.

The basic components of these systems include solar panels, a charge controller, an inverter, and batteries for storage.

The DC electricity flows from the charge controller to the batteries for storage. In most residential setups, homeowners often use lithium-ion or lead-acid batteries due to their efficiency and affordability.

For example, suppose there's a sudden power outage on a sunny day. Your solar panels are generating power but have nowhere to send that energy since the grid is down. With a solar battery backup system in place, the excess energy generated by your solar panels can be stored in the battery bank instead of feeding back into the grid.

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Benefits Of Using Solar Battery Backup Systems

One of the most significant advantages of using solar battery backup systems is achieving increased energy independence. By storing excess solar power generated during the day, homeowners can minimize their reliance on the electric grid and reduce vulnerability to power outages caused by natural disasters or other unforeseen events.

In addition, utilizing a solar battery backup system has financial benefits as well. With stored solar energy available for use during peak periods when electricity rates are higher, homeowners can effectively lower their energy bills by reducing consumption from the grid – which in turn helps them recover their initial investment in solar technology faster.

Furthermore, depending on your location and utility company policies, residential solar battery storage may make you eligible for government incentives or rebates that promote greener living solutions.

Factors To Consider When Selecting A Solar Battery Backup System

Consider your energy needs, battery capacity and type, compatibility with your solar panel system, longevity and warranty, as well as cost and financing options when selecting a solar battery backup system for your home.

Your Energy Needs

It's important to understand your household's energy needs when selecting a solar battery backup system. Start by examining your electricity bills from the past year and analyzing how much energy you typically use during peak hours.

This information will help you determine the size of the battery capacity you need for optimal usage. For example, if you have a larger home with more appliances and electronics, then you may require a higher kWh battery capacity than someone with a smaller home.

Additionally, consider any future changes in energy consumption such as installing electric vehicle charging stations or expanding your living space.

As with any significant purchase decision, comparing different battery quotes is recommended to ensure that homeowners get the best solar battery for their energy needs while also being mindful of cost and storage capacity requirements.

Battery Capacity And Type

Another crucial factor to consider when selecting a solar battery backup system for your home is the battery capacity and type.

Lithium-ion batteries are popular in the solar industry because they offer high storage capacity, fast charging time, and long lifespan compared to other types like lead-acid batteries.

Additionally, some lithium-ion batteries like Tesla's Powerwall 2 come with advanced features such as liquid cooling systems that optimize their performance even under extreme temperatures.

Compatibility With Your Solar Panel System

Your solar battery backup system needs to be compatible with your existing solar panel setup. This helps ensure that you're able to maximize the amount of energy your panels produce by storing excess energy for later use.

One important factor to consider is whether your inverter is a traditional string inverter or micro-inverter. Traditional systems will require an AC-coupled battery, which connects between the inverter and the grid.

When evaluating different solar batteries, it's crucial to check if they're compatible with your current system. For example, some systems may only work on certain types of inverters, while others may not provide enough storage capacity for larger installations.

Longevity And Warranty

The longevity and warranty of a solar battery backup system are important factors to consider when selecting the best one for your home. A typical warranty for solar batteries is around 10 years, which guarantees a 70% operating capacity after that time.

As such, it's vital to choose a reliable brand with a proven track record in the market. Look for companies with reputable warranties backed by strong customer reviews and ratings.

Some brands offer more extended warranties or even prorated replacements if their products don't perform as expected during the guaranteed operating period.

Cost And Financing Options

The cost of installing a solar battery backup system for your home can vary significantly depending on the specific system and its features. While prices have been going down recently, it's still important to consider factors such as battery storage capacity, cycle life, and voltage when deciding on a system that fits your budget.

But don't let cost deter you from investing in this valuable addition to your home. There are financing options available that can help make the upfront costs more manageable.

For example, some government incentives in the form of tax credits or rebates may be available to further offset costs and encourage renewable energy adoption.

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Top Solar Battery Backup Systems For Homes In 2023

In 2023, the top solar battery backup systems for homes include SunPower SunVault, Tesla Powerwall 2, Sonnen Eco, Enphase IQ, Generac PWRcell, LG Chem RESU, and Panasonic EverVolt.

SunPower SunVault

The SunPower SunVault is a top-of-the-line solar battery backup system that provides reliable power during outages and reduces energy costs for homeowners with solar panels.

The SunVault charges from the Equinox solar panel system, creating a "perpetual" energy backup system. This exceptional battery storage capacity offers enough power to keep your home running smoothly even during extended outages, making it one of the best choices for homeowners who want to be fully prepared for any eventuality.

In addition to its impressive performance, SunPower is known for offering high-quality solar panels that enable homeowners to save money on their utility bills while reducing their carbon footprint.

Tesla Powerwall 2

One of the top solar battery backup systems for homeowners is the Tesla Powerwall 2. This powerful battery is rated as one of the best for its higher storage capacity and power output.

However, it is associated with high costs, with prices ranging up to $14,200 for one unit. Starting at $11,500 for a single unit, Tesla Powerwall prices can increase depending on your location.

Adding this battery backup system to your solar PV system is the best solution to store excess electricity in a home battery and provide reliable backup power during outages.

Sonnen Eco

Sonnen Eco is a top-rated company that offers intelligent home battery solutions for energy storage and backup power, with or without solar. The company's product has been associated with the best solar battery backup systems for homes in 2023, providing reliable backup power during outages for homeowners considering solar.

What sets Sonnen Eco apart from other companies is its remote monitoring capabilities, giving you real-time data about your system's performance through an app. With decades of experience in communication connection and bus communications, Sonnen Eco has established itself as a leader in this space.

Additionally, the product comes with a standard year warranty and is built using well-proven PylonTech LFP battery modules – guaranteeing quality AC battery systems that will last beyond the initial investment.

Enphase IQ

Enphase IQ is a high-quality battery backup system that's designed for homeowners who want to store excess solar energy and use it when the power goes out. The battery is available in capacities of 3.3 kWh and 10 kWh, making it suitable for both residential and light commercial use.

Another great feature of Enphase IQ is its ability to work seamlessly with grid-tied solar panel systems. This means that you can easily add the battery to your existing solar setup without any major installation hassles or additional costs.

In terms of price, Enphase IQ may cost around $5,000 to $10,000 depending on the size (does not include installation costs).

Generac PWRcell

The Generac PWRcell is a top-of-the-line solar home battery backup system that offers homeowners the power and capacity needed to stay connected during power outages. With its ability to store energy produced by a solar panel array, this battery backup system helps homeowners save money on their energy bills while ensuring reliable access to electricity in emergency situations.

What sets the Generac PWRcell apart from its competitors is its impressive capacity range of 9 kWh up to 17.1 kWh per unit.


If you are considering a solar battery backup system for your home, the LG Chem RESU 10H is a great choice. This high-quality lithium-ion home solar battery has been rated as one of the best in its class and offers essential backup and time-of-use savings at a lower price point compared to competitors.

With a capacity of 9.8 kWh, it can store excess energy from your solar panels during the day and provide power during outages or times when energy rates are higher.

Panasonic EverVolt

The Panasonic EverVolt is a scalable storage system that homeowners should consider when selecting a solar battery backup for their homes. It integrates seamlessly with Panasonic solar panels to create the Total Home Solar Energy System, providing reliable backup power during outages and reducing energy costs over time.

The EverVolt has both AC and DC-coupled configurations, making it versatile in different homes. Additionally, the EverVolt home battery is being compared to the Tesla Powerwall as one of the top batteries on the market for delivering better backup power for homes.

How To Choose The Best Solar Battery Backup System For Your Home

To choose the best solar battery backup system for your home, you should evaluate your power needs, consider your budget and installation process, and look for specific features that meet your requirements.

Determine Your Power Needs

To choose the best solar battery backup system for your home, you need to determine your power needs. This involves figuring out how much energy you use on a daily basis and what devices or appliances require more electricity.

It's important to note that calculating the amount of power a battery can store in kilowatt-hours (kWh) is crucial when selecting a solar battery backup system. A customized solution that takes into consideration the specific energy needs of each household or business will provide maximum efficiency and long-term savings.

Evaluate Your Budget

Before investing in a solar battery backup system, it's crucial to evaluate your budget and determine how much you're willing to spend upfront. While battery storage systems can be slightly expensive, they are an investment worth considering as they offer long-term cost savings on energy bills.

It's important to note that the cost of a system typically depends on factors such as battery capacity, depth of discharge, usable storage capacity, and brand.

For homeowners on a tight budget or cannot afford a full set of solar panels and large battery backup systems, going for portable batteries with solar chargers may be more affordable options available in the market.

The advantage of these smaller units is that they can easily be transported around for outdoor activities while still providing reliable power during emergencies or power outages at home.

Consider The Installation Process

Installing a solar battery backup system in your home requires careful consideration of the installation process. It is important to ensure compatibility with your existing solar panel system or plan for future installations.

Additionally, you need to evaluate whether you will install the battery backup system yourself or employ professional installation services.

If you decide to hire professionals for installation services, it's crucial to choose certified and experienced technicians who use high-quality equipment. Sunstate Power Solar Solutions is ready and able to help you with your solar battery backup system installation.

Look For Features That Meet Your Specific Needs

It's important to choose a solar battery backup system that meets your specific needs. Some factors to consider when selecting a solar battery backup system include the amount of energy you use, the size and type of battery, compatibility with your current solar panel system, and any other features that may be important for your home.

Additionally, some homeowners may prioritize sustainable and environmentally friendly options while others are more concerned about cost-effectiveness.

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Benefits Of Solar Battery Backup Systems

Solar battery backup systems provide reliable backup power during outages, reduce energy costs, increase home value, and offer potential government incentives.

Reliable Backup Power During Outages

One of the most significant advantages of installing a solar battery backup system is the ability to provide reliable backup power during outages. Whether caused by natural disasters or grid failures, power outages can be uncomfortable and even dangerous.

With a solar battery backup system, homeowners can have peace of mind knowing that they will still have access to essential appliances and devices even when the grid goes down.

This means being able to keep refrigerators running, lights on, and communication devices charged. In addition, since solar batteries are rechargeable using renewable energy from the sun, they offer an environmentally friendly alternative to traditional gasoline-powered generators.

Reduced Energy Costs

Investing in a solar battery backup system can be an effective way to reduce your energy costs. By using excess energy generated by your solar panels during the day, you can power your home at night instead of relying on grid power.

In addition, many utility companies offer incentives for homeowners who generate their own renewable energy. By switching to solar and relying less on grid power, you may be eligible for rebates or other financial incentives that further reduce your monthly bills.

Sustainable And Environmentally Friendly

One of the biggest advantages of using solar battery backup systems in your home is that they are sustainable and environmentally friendly. By harnessing the power of the sun, you can reduce your reliance on traditional energy sources and decrease your carbon footprint.

Additionally, solar batteries allow you to store excess energy generated by your solar panel system during peak sunshine hours for use later when the sun goes down or during a power outage.

This means less dependence on grid power from utilities that often rely on non-renewable energy sources such as coal-fired power plants.

Increased Home Value

One of the lesser-known benefits of installing a solar battery backup system is that it can significantly increase the value of your home. A recent study by Zillow found that homes with solar energy systems not only sold for more than their non-solar counterparts but also had a faster time to sale.

In addition, solar panels and batteries are viewed as upgrades similar to renovation projects, making them an attractive investment both financially and environmentally.

Potential Government Incentives

There are several government incentives that homeowners should be aware of when considering solar battery backup systems. The federal Inflation Reduction Act of 2022 contains incentives that may affect the decision to add battery backup to an existing solar system, such as the investment tax credit (ITC) and the Residential Clean Energy Credit.

Some incentives that have been available include the following:

  1. Federal Investment Tax Credit (ITC): This federal program provides a tax credit of 26% of the cost of installing a solar energy system, including the battery storage system, if it's charged primarily by the solar panels. The tax credit was set to decrease to 22% in 2023 and then expire for residential systems in 2024. Keep in mind that these rates may have changed since my knowledge cutoff date.

  2. Arizona State Tax Credit: Arizona provided a state tax credit of 25% of the cost of solar energy devices, including battery storage, up to a maximum of $1,000. This credit could be applied to your state income tax liability.

  3. Utility Incentives: Some utility companies in Arizona may have offered incentives or rebates for installing energy storage systems, like batteries, when paired with solar. For example, Tucson Electric Power (TEP) had a Residential Energy Storage Program that provided incentives for customers installing battery storage systems. However, these programs may have changed, and it's essential to check with your local utility for the latest information.

To ensure you have the most accurate and up-to-date information on incentives and tax credits for home battery storage in Tucson, Arizona, check with the Arizona Department of Revenue, the Database of State Incentives for Renewables & Efficiency (DSIRE), and your local utility company.

Conclusion And Final Thoughts

In summary, a solar battery backup system is an excellent investment for homeowners who want to save money on energy costs and have reliable backup power during outages. When choosing the best solar batteries for your home, consider several factors such as your energy needs, battery capacity and type, compatibility with your solar panel system, longevity and warranty, and cost.

Several top-rated solar battery backup systems are available in the market today that can meet specific needs like SunPower SunVault, Tesla Powerwall 2, Sonnen Eco among them.

Remember to evaluate your budget carefully so that you invest in a solar battery storage solution that meets your power requirements without breaking the bank.


What factors should I consider when selecting a solar battery backup system for my home?

When selecting a solar battery backup system, it’s important to consider your energy usage needs, the size of your home and the type and amount of appliances you want to power during an outage. You’ll also need to consider the cost and warranty length of different systems.

What are the benefits of using a solar battery backup system?

Solar battery backup systems enable homeowners to store excess energy created by their solar panels during peak production times so that they can use it later during outages or when electricity rates are higher. This can help reduce overall energy costs while providing reliable power in emergency situations.

How do I know if I need a larger or smaller capacity solar battery backup system for my home?

Consulting with an experienced technician is recommended when determining what size capacity you need for your specific household based on how much electricity you consume on average and what kind of appliances you want to keep running during outages.

Can I still use my existing solar panel array with a new solar battery backup system?

Yes, many existing residential solar panels can be paired with new battery storage technology provided that proper compatibility standards have been met between manufacturers involved in both products. An experienced technician can recommend compatible systems that work best specifically for your unique needs & requirements without risking damage due improper pairings or connection methods used incorrectly leading otherwise avoidable complications down road such as fire risk hazards caused by electrical shorts etc.

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