STORAGE BATTERIES

WHAT ARE BATTERY ENERGY STORAGE SYSTEMS (BESS)

Power goes out. It happens during summer storms that roll through Atlanta without warning, during peak demand events that strain Georgia's aging grid, and during the kind of extended outages that can shut a business down for hours — or days. For most companies, that moment of darkness means lost revenue, spoiled inventory, missed deadlines, and the kind of operational disruption that's hard to fully recover from. And the frustrating truth is that it's almost entirely preventable.

Solar DC Power designs and installs commercial energy storage battery systems for businesses across Atlanta and the Carolinas that want to stop being at the mercy of the grid. We've been building clean energy infrastructure in the Southeast for five years, led by a Professional Engineer with 35 years of real-world experience. Our storage battery solutions aren't off-the-shelf products we swap in and call it done — they're engineered systems, designed around your facility's power demands, your critical loads, and your long-term energy strategy. We size, specify, permit, and install the right battery storage solution for your specific situation.

Whether you're a commercial property owner in Midtown Atlanta trying to protect your tenants from outage disruptions, a manufacturer in the Carolinas managing power quality and demand charges, or a data center operator looking to locate infrastructure in rural areas where clean energy and low operating costs align - Solar DC Power builds the energy storage foundation that makes it possible. Backed by professional engineering and local expertise, we're the team that turns battery storage from a good idea into a working system.

Battery Energy Storage Systems (BESS) are systems that store electrical energy for later use, typically using rechargeable batteries. These systems are designed to store excess energy generated from renewable sources like solar and wind and release it when demand is high or when generation is low. BESS helps balance the supply and demand of electricity, ensuring a stable and reliable power supply. At the core of any Battery Energy Storage System are the batteries, which store electrical energy for later use. Batteries are the primary medium for energy storage in BESS, and their performance is a critical factor in determining the system’s efficiency, cost, and scalability. There are various types of batteries used in BESS, and each type has its unique properties, benefits, and challenges. The most common types of batteries used in BESS include:

Lithium-Ion Batteries:

Lithium-ion (Li-ion) batteries are the most widely used type in energy storage systems due to their high energy density, long lifespan, and relatively low maintenance requirements. These batteries can store large amounts of energy in a compact size and discharge it efficiently, making them ideal for both residential and utility-scale applications. Their ability to charge and discharge rapidly also makes them a great fit for managing peak loads and integrating intermittent renewable energy sources, such as solar and wind. A safety issue with lithium batteries is they heat up and have caused deadly fires. BYD, the largest EV manufacturer in the world, fastens baffles to dissipate heat on its Lithium Iron Phosphate batteries used in their EVs. Also, Ifron has been added, and most used Lithium batteries today are LEPs, Lithium Ferric Phosphate.

Sodium-Sulfur Batteries:

Sodium-sulfur (NaS) batteries are high-temperature batteries commonly used in utility-scale energy storage applications. These batteries are known for their high energy efficiency and ability to store large amounts of energy, even in harsh conditions. They operate at temperatures between 300°C and 350°C, which allows them to store and release energy at a very high rate, making them ideal for grid stabilization. However, they require specific temperature conditions and insulation, which can increase the complexity of their deployment. Whereas Sodium Ion batteries are more stable, and sodium is perhaps the most abundant and easily available known element, sodium batteries are far less expensive than Lithium batteries. Sodium batteries are just beginning to be mass-manufactured.

Sodium Ion Batteries:

Sodium-ion batteries represent the most significant shift in storage chemistry in decades. Unlike lithium, sodium is one of the most abundant elements on Earth — found in ordinary salt, available everywhere, with no rare earth mining, no Congo supply chains, and no geopolitical vulnerabilities. BYD, the world's largest EV manufacturer, has begun mass-producing sodium-ion batteries, marking a turning point from laboratory promise to commercial reality. Sodium-ion batteries carry no thermal runaway risk, perform better in cold temperatures than lithium-ion, and are projected to cost significantly less at scale. For grid-scale storage, microgrids, and agrivoltaic data centers, sodium-ion represents the chemistry that makes true energy independence economically viable.

Flow Batteries:

Flow batteries are a type of rechargeable battery that uses liquid electrolytes to store energy. Unlike lithium-ion and sodium-sulfur batteries, which store energy in a solid form, flow batteries store energy in a liquid form that is pumped through the system. This unique design allows flow batteries to be highly scalable, meaning they can easily be expanded to store larger amounts of energy without sacrificing efficiency. Flow batteries are particularly suitable for large-scale, long-duration storage, and can last for thousands of charge-discharge cycles.

Flow batteries are an emerging technology in which the internal dynamics change: unlike conventional batteries, the electrolytes are stored in separate tanks and then flow into a central cell where they react during the charging and discharging phases. Vanadium batteries are the most common, but research is also focusing on zinc-bromine and zinc-iron models. This is a promising solution, thanks to its longer lifespan.  https://www.sciencedirect.com/topics/engineering/islanded-mode

Fuel Cells:

Fuel cells convert fuel into high-efficiency electricity without combustion. Other outputs include high-temperature air and a high-concentration CO2 stream. The CO2 can be easily captured.  And, solid oxide technology converts natural gas, biogas, or hydrogen into electricity without combustion, resulting in low or no CO2 emissions.

Demarks Molten Salt Battery:

Denmark has placed in service the MOSS (Molten Salt Storage) project in Esbjerg, it is a demonstration plant with plans for larger, utility-scale applications.

THE ECONOMIC AND SOCIAL IMPACT OF BESS

BESS have a very favorable impact on the energy market: thanks to their operation, they can provide grid services and energy at times of high demand at more competitive prices than traditional generation plants; furthermore, they promote the flexibility of the electricity system and distributed generation, characteristics of the new paradigm. The old unidirectional model, with a few large power plants supplying electricity to passive users, is transforming into a multidirectional grid with many producers who are active players in the market. This marks an epoch-making change, not only from a technological but also from a social point of view. This transitional change will decentralize electricity distribution and automatically provide cybersecurity.

From an economic point of view, the most immediate beneficiaries of BESS are their private users, who save on their electricity bills and enjoy greater security of electricity supply. There are significant advantages both for the comfort of individual citizens and, even more so, for the competitiveness of businesses. Not only that, in the case of Microgrids or energy communities, BESS also becomes a tool for social cohesion.

Last but not least, BESS have a beneficial impact on humanity from an environmental point of view: by promoting the spread of clean energy sources, they help mitigate climate change and improve air quality.

The role of BESS in the energy system is therefore increasingly crucial from a social and environmental sustainability perspective: in order to pursue a fair and secure energy transition, their presence must become increasingly widespread. Continuous improvements in terms of costs and performance give us every reason to believe that this will indeed be the case.

In conclusion, the future of storage batteries is defined by breakthroughs in chemistry, scale, and intelligence—moving beyond lithium-ion into multi-chemistry systems that will underpin clean energy, resilient grids, and electrified transport. By the 2030s, lithium-ion will no longer dominate alone; diverse chemistries will coexist to serve different applications. Storage batteries are an important part of the global energy system today and are poised to play a critical role in secure, clean energy transitions. In the transport sector, they are an essential component in the millions of electric vehicles sold each year. In the power sector, battery storage is the fastest-growing clean energy technology on the market. The versatile nature of batteries means they can serve utility-scale projects, behind-the-meter storage for households and businesses, and provide access to electricity in decentralised solutions like mini-grids, Microgrids, and solar home systems. Moreover, falling costs for batteries are rapidly improving the competitiveness of electric vehicles and storage applications in the power sector.

Why Atlanta Businesses Need Energy Storage — And Why Now

Grid reliability in the Southeast is under increasing pressure. Metro Atlanta's rapid growth, the surge in data center development, and the region's vulnerability to severe weather events have all combined to make power outages more frequent and more costly for businesses. A single prolonged outage can cost a restaurant thousands in spoiled food, a medical office hundreds of thousands in interrupted care, or a warehouse operation its entire day's throughput. For businesses that simply cannot afford downtime — and that's most of them — energy storage is no longer optional infrastructure. It's essential.

Storage batteries  also solve a second, less visible but equally expensive problem: demand charges. Georgia Power and the major utilities serving the Carolinas bill commercial customers not just for the total energy they consume, but for the peak rate at which they draw it. A single 15-minute spike in demand can dramatically inflate a monthly utility bill. A properly engineered battery storage  system smooths those peaks by drawing from stored power instead of the grid during high-demand periods — cutting demand charges without cutting operations. For energy-intensive businesses, manufacturers, and large commercial facilities, the savings can be substantial.

There's a third scenario that's becoming increasingly important across the Southeast: the growing demand for data center infrastructure. As urban communities push back against large data centers — citing noise, heat, and strain on local power grids — forward-thinking operators are exploring rural siting as a strategic alternative. Solar DC Power sees this as one of the most powerful alignments in clean energy today. Rural land, paired with agrivoltaic solar installations that generate clean power while supporting farm operations, can provide the affordable, reliable, and sustainable energy infrastructure that data centers need — while delivering new income streams to independent farmers and bringing high-quality local food production back to communities that have been underserved by industrial agriculture.