Solar Battery Storage in St. Louis
Take Control of Your Energy with Solar Battery Storage

Solar energy is a smart investment, but what happens when the sun isn’t shining? With solar battery storage, you can keep your lights on, lower your energy costs, and gain true energy independence—day or night.

At StraightUp Solar, we believe in solutions that make solar work smarter for you. Since 2006, we’ve helped St. Louis homeowners and businesses harness clean, reliable energy. Our expert team will design a battery storage system tailored to your needs, ensuring you get the most from your solar investment.

How Solar Battery Storage Works

Solar battery storage systems allow you to store excess energy generated by your solar panels during the day for use when the sun isn’t shining. This ensures a consistent energy supply, reduces reliance on the grid, and offers peace of mind during power outages. With a solar panel-battery combo, the excess energy from the sun charges your battery for nighttime use, allowing you to self-consume more of your energy instead of drawing from the utility grid.

Benefits of Solar Battery Storage in St. Louis

1. Energy Independence

By storing surplus solar energy, you can reduce dependence on utility providers, protecting yourself from fluctuating energy prices and potential grid disruptions. This autonomy allows you to manage your energy consumption more effectively and ensures a reliable power supply for your home or business.

2. Backup Power During Outages

St. Louis experiences its share of storms and unpredictable weather. A solar battery system provides a reliable backup power source, keeping essential appliances and systems running during outages. Unlike traditional generators, solar batteries offer a clean and quiet solution without the need for fuel.

3. Financial Savings

Solar battery storage is affordable with the 30% Federal Solar Investment Tax Credit (FITC). Energy stored during daytime production can be used in the evening and night time, saving money for homeowners on time of use utility rates.

Our Solar Battery Storage Solutions

Solar battery storage isn’t one-size-fits-all, which is why StraightUp Solar offers industry-leading options to fit your energy goals. We are a certified installer for the Enphase IQ Battery, FranklinWH, and Tesla Powerwall, two of the most advanced and reliable battery solutions available.

Enphase IQ Battery: Safe, Smart, and Scalable

The Enphase IQ Battery is designed for homeowners and businesses who want a flexible, high-performance energy storage solution with industry-leading safety features. Unlike traditional lithium-ion batteries, the Enphase IQ uses lithium iron phosphate (LFP) chemistry, known for its superior safety and longevity.

Advanced safety technology: LFP battery chemistry reduces overheating risks, making it one of the safest battery storage options available.
Seamless integration with Enphase microinverters: Works smoothly with Enphase solar systems for a highly efficient and smart energy solution.
Smart energy management: The Enphase app lets you monitor real-time energy flow, track savings, and optimize battery usage.
Modular design: The IQ Battery can be sized to meet your energy needs, allowing for future expansion as your energy demands grow.

Tesla Powerwall: Reliable Backup with Smart Monitoring

The Tesla Powerwall is one of the most well-known solar battery storage solutions, offering seamless integration with solar panels and powerful backup capabilities. With a sleek, compact design, the Powerwall provides homeowners and businesses with:

Whole-home backup power: Automatically powers your home during outages, ensuring uninterrupted electricity for critical appliances.
Seamless energy management: The Tesla app allows real-time monitoring of energy production, consumption, and battery status from anywhere.
Time-based control: Store excess energy during the day and use it when electricity rates are highest to maximize savings.
Scalable storage: Expandable battery capacity allows you to add multiple Powerwalls as your energy needs grow.

FranklinWH: Powerful. Reliable. Ready for Anything.

The FranklinWH aPower 2 delivers 15 kWh of storage and 10 kW of output—more than enough for whole-home backup. With safe, long-lasting LFP battery chemistry and broad inverter compatibility, it’s a smart, flexible choice for energy independence.

Power You Can Count On: Delivers 15 kWh of storage and 10 kW continuous output—enough to power major appliances like a 5-ton A/C unit, EV chargers, and more without compromise.
Safety-First Design: Built with ultra-stable LFP battery chemistry and fan-free thermal management for quiet, efficient, and worry-free performance.
Flexible & Future-Ready: Compatible with all solar inverter brands and expandable up to 225 kWh, the aPower 2 easily fits into both new and existing solar setups.

Why Choose Our Solar Battery Solutions?

Since 2006, StraightUp Solar has installed more than 3,000 residential and commercial solar projects across Illinois and Missouri. With more than half our team NABCEP certified, our professionals ensure every battery storage system is expertly designed and installed to maximize energy savings and reliability.

Rooted in the St. Louis community, we understand the unique energy needs of our region. Our comprehensive approach covers every step, from personalized consultation and custom design to professional installation and ongoing maintenance.

Guided by our CLEARE values — Care for Community, Lead the Energy Transition, Educate Everyone, Advocate with Purpose, Respect People & Planet, and Embody Excellence — we are committed to delivering exceptional service and fostering a sustainable future for all.

Frequently Asked Questions

Will a battery storage system power my entire home during an outage?

It depends on the size of your battery and your energy needs. Many homeowners choose to back up essential appliances like refrigerators, lighting, and medical devices, while larger systems can support more of your home’s energy demand. Our team will help design a system that fits your goals.

How long does a solar battery last?

Most solar batteries have a lifespan of 10 to 15 years, with warranties guaranteeing performance over time. Factors like usage patterns, environmental conditions, and battery chemistry can impact longevity.

Can I add a battery to my existing solar system?

Yes! If you already have a solar system, you can add a battery for backup power and greater energy independence. The process varies depending on your current system, but our team can assess your setup and recommend the best battery storage solution.

Will my solar battery work during the winter or on cloudy days?

Yes, but solar production may be lower during cloudy or winter days. Your battery will store excess energy from sunnier days so you can still use solar power when production is reduced. Proper system sizing and smart energy management help ensure consistent performance year-round.

How much maintenance does a solar battery require?

Solar batteries require minimal maintenance. Most modern systems, like the Tesla Powerwall and Enphase IQ Battery, come with smart monitoring apps that allow you to track performance in real time. We also offer support and maintenance services to ensure your system runs optimally.

Still have questions? Our team is happy to help! Contact StraightUp Solar today to learn how battery storage can work for you.

Take the Next Step Towards Energy Independence

Investing in solar battery storage is a forward-thinking decision that offers immediate and long-term benefits. Let us help you harness the power of the sun to create a more sustainable and resilient energy future for your home or business.

Contact StraightUp Solar today for a free consultation and a personalized quote.

STRAIGHTUP SOLAR
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Webinar: Top 3 Solar Battery Incentives in 2026

Events

Feb 26 | WEBINAR | Top 3 Solar Battery Incentives in 2026

Learn the top 3 solar battery incentives for homeowners & businesses in 2026, including Illinois rebates & Tesla Next Million Powerwall Rebate.

February 11, 2026

Metro East Illinois Homeowner standing happily in front of his rooftop solar installation from StraightUp Solar on a clear sunny day

Advocacy & Policy

Illinois SREC Incentives Increase in 2026

New “Big Beautiful Bill” changes the federal commercial solar tax credit. Find out how your MO or IL business can secure the credit before it’s gone!

January 26, 2026

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