Commercial energy storage systems for businesses: Important factors when purchasing – cycle count and other key figures in focus.

📡 As energy costs for businesses and industries rise rapidly, commercial energy storage systems are becoming increasingly important. Companies that operate energy-intensively or have already invested in photovoltaic systems face the challenge of optimizing their self-consumption of energy. However, selecting the right battery storage system is often complicated and raises numerous questions. Which key performance indicators (KPIs) are truly meaningful when evaluating offers? How can reliable systems be distinguished from less effective ones?

In this guide, we offer comprehensive guidance in the decision-making process, clarify misunderstandings, and prepare you for typical pitfalls.

📊 Key performance indicators for electricity storage and their significance

An efficient energy storage system can mean the difference between inefficient energy waste and optimized use. It allows energy to be stored during periods of low demand and made available when needed. Here are the key performance indicators that are crucial when evaluating an energy storage system:

Overall efficiency

A common misconception is that the efficiency of individual components reflects the overall performance of an energy storage system. However, what is crucial is the overall efficiency, which describes how much of the input energy is ultimately usable.

Ask your supplier explicitly about the overall efficiency and have them explain the processes and components involved. Overall efficiency takes into account all losses that occur during energy storage and withdrawal. This includes aspects such as charging and discharging losses, as well as losses due to system operation and self-discharge.

Warranty conditions

Warranty terms and conditions are often a hidden cost factor. In the event of a warranty claim, it is crucial to know who is responsible for the costs. Sometimes, the burden of proof lies with the buyer, which can lead to further complications.

Carefully review the warranty terms and conditions and obtain written confirmation. Pay attention to how defects must be proven and who is liable in the event of damage. A transparent and comprehensive warranty can lead to significant cost savings in the long run.

Price and included services

Price transparency is often more complex than it initially appears. Which technical systems are included in the price? An integrated energy management system (EMS) can be crucial for efficiency. Post-installation services, such as monitoring or user-friendly remote control of the energy storage system, are also essential.

Request a detailed cost estimate and have each item explained to you in detail. Clarify whether the price includes all necessary components and services or whether additional costs are to be expected.

🚫 Common pitfalls and how to avoid them

There are certain key performance indicators (KPIs) that initially appear attractive, but upon closer inspection do not reflect the actual benefit. Always consider the following sales arguments with caution.

LCOE (Levelized Cost of Energy)

Originally intended for comparing PV systems, the LCOE has its pitfalls when applied to energy storage systems. This value can be misleading because it does not take into account the overall efficiency of the storage system (charging and discharging cycles).

When comparing storage offers, focus on overall efficiency and consider the LCOE as additional information.

Cycle count

Determining the lifespan of a battery storage system based on the number of cycles is hardly reliable today. Average estimates can vary significantly depending on usage and environmental conditions.

Pay close attention to the warranty terms and try to transfer the risk associated with battery lifespan to the manufacturer. While a high number of cycles is desirable, it shouldn't be the sole criterion.

efficiency

Efficiency is a frequently cited but often misunderstood metric. Be sure to ask which processes and components are included in this calculation. Efficiency only provides a limited indication of how efficiently a battery storage system actually operates.

Always consider efficiency ratings in relation to overall efficiency.

Energy density

Gravimetric or volumetric energy density can be of interest in certain storage applications, but usually plays a minor role in commercial storage systems. A high-energy-density storage system can be useful when space is a factor, but often other factors are more decisive.

📊 HTW Berlin analyzes: Efficiency comparison of battery storage systems questionable

The pv magazine article titled "Battery Storage Test 2024: Comparing Apples and Oranges " discusses a questionable product comparison in which the "Sungrow SBR096" battery storage system was declared the test winner due to its high efficiency. The article points out that this comparison is problematic. An analysis by HTW Berlin demonstrates why comparing efficiency based solely on datasheet values ​​is not very useful and what negligent errors were made in the process.

🌍 A future-oriented decision

Purchasing a commercial energy storage system is a forward-looking decision that requires thorough research and asking the right questions. Here are some additional aspects to consider when making your decision:

Environmental friendliness and sustainability

Besides financial considerations, the environmental impact is playing an increasingly important role. What materials are used in the batteries? Can they be recycled? Sustainable energy storage not only reduces the company's carbon footprint but can also have a positive effect on its corporate image.

Financing and funding opportunities

Many countries now offer incentive programs for companies that want to invest in energy storage systems. Find out about potential subsidies, loans with favorable terms, or tax breaks. Professional advice can help you make the most of the available options and reduce investment costs.

Integration into the energy management system

Seamless integration of the new storage system into the company's existing energy management is crucial. The storage system should not only store energy but also be intelligently controlled to avoid peak loads and maximize self-consumption. A modern energy management system (EMS) can support this.

Future-proof and scalable

Technology is constantly evolving. Therefore, you should ensure that your chosen energy storage system is future-proof and scalable. Can the storage capacity be easily expanded as energy demand increases? Is the technology used sustainable and will it continue to be supported and further developed?

An efficient energy storage system can significantly contribute to reducing energy costs and enable more sustainable operations. The right energy storage system not only improves financial efficiency but also the company's energy resilience. In times of energy transition and decarbonization, the storage of renewable energies plays a central role. With the right storage technology, a company can not only reduce costs but also contribute to climate protection and position itself as an environmentally conscious player.

✔️ Understanding key performance indicators and asking the right questions

Investing in commercial energy storage is a strategic decision that should be based on sound information and careful planning. Understanding the key performance indicators and asking the right questions is essential. This guide is designed to help you identify the best energy storage system for your needs and avoid potential pitfalls. This will ensure that your investment is not only financially worthwhile but also future-proof and sustainable.

📣 Similar topics

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• 💡 Optimize energy management: Key factors for commercial electricity storage
• 🛠️ Purchasing battery storage: What companies need to consider
• 📊 Increasing efficiency: The most important key figures for energy storage
• 🔍 The perfect commercial storage solution: Decision-making made easy
• ⚙️ Buying the right energy storage system: A comprehensive guide
• 💸 Keeping costs in mind: Price-performance ratio of battery storage systems
• 🔒 Guarantees & Service: What to look out for with battery storage systems
• ⚡ Using energy wisely: How battery storage can help companies
• 📈 Future-proof: Invest in commercial energy storage

#️⃣ Hashtags: #EnergyEfficiency #BatteryStorage #EnergyCosts #CommercialStorage #EnergySaving

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