Commercial Storage – Green, High-Performance & Versatile

A commercial storage unit is an electricity storage unit for small and medium-sized businesses. It stores surplus solar power from a PV system, for example, and makes it available when needed. This enables commercial enterprises to increase their own consumption, reduce energy costs, and at the same time reduce the load on the grid through intelligent control. Commercial storage units usually have a capacity of at least 30 kWh.

A commercial energy storage system makes your business more independent and sustainably reduces energy costs. With our intelligent energy management system, your consumption is optimized, positively impacting your bottom line and sustainability goals.

A commercial storage system is suitable for various applications that help companies reduce energy costs and optimize their energy supply. Typical areas of application include optimizing self-consumption, peak load capping, optimized use of dynamic electricity tariffs, and virtual grid connection expansion.

How are commercial storage systems monitored and controlled?
The Voltfang Energy Management System (EMS) monitors the systems around the clock—including status data down to the cell level, performance checks, and alerts. The EMS automatically optimizes the charging and discharging processes of a commercial storage system and decides when the storage system should be charged, discharged, or when electricity should be fed into the grid in order to achieve the greatest possible cost savings. Peak shaving, PV surplus utilization, charging/load management, dynamic electricity tariffs, and marketing connections are configured centrally in this way. This allows multiple applications to be operated in parallel (multi-use) safely and economically.

The Venma web app is the central management platform for your storage system. It provides a live overview of consumption, generation, charge status, self-sufficiency, and your active use cases such as dynamic electricity prices, multi-use, peak load shaving, or self-consumption optimization. In addition, connected components such as PV systems, heat pumps, or charging points are displayed in an integrated manner. Historical data for any period can be viewed and exported. Voltfang also provides 24/7 monitoring and maintenance of the system via the app, giving you full transparency and control at all times.

Our system stores cheaper electricity when tariffs are low and releases it as needed. The intelligent energy management adapts to market prices, maximizing cost efficiency and providing flexible energy use for your business. More information can be found here: dynamic electricity tariffs and commercial energy storage.

No, our storage system also works without a PV system, for example, to utilize dynamic electricity tariffs or as a charging infrastructure for electric vehicles. This way, you stay flexible, regardless of your existing infrastructure.

The optimal size of the storage system depends on your individual electricity consumption profile, peak loads, and any existing or planned PV system. A professional economic analysis by Voltfang calculates the required capacity and performance as well as the payback period.

Voltfang 2 scales in practical increments: 1 rack with 90 kWh usable capacity and 92 kW nominal power, 2 racks with 180 kWh and 92/184 kW. The charging/discharging rate is 0.5 C or 1 C, depending on the design. Voltfang 2 Indoor scales analogously in the same application range up to >1MWh. For requirements in the MWh range, several cabinets or systems are combined – above a certain threshold, Voltfang 2 Plus GS is the appropriate option.

Voltfang 2 (Outdoor) is a turnkey, all-in-one solution for outdoor use: the inverter, AC sub-distribution, and EMS are integrated, and the robust housing and efficient climate control allow operation from −20 to +50 °C. Voltfang 2 Indoor is designed for use in buildings and is suitable for technical rooms, existing properties, and production environments. Both commercial storage systems address typical C&I use cases such as peak shaving, self-consumption optimization, and intelligent control of PV, charging points, and heat pumps.

Yes, the Voltfang 2 is specifically optimized for outdoor use. It is weatherproof and robust, making it ideal for various environments and conditions.

Our storage system uses powerful, safe, reused electric car batteries. These second-life batteries come from well-known German OEMs and were originally used in electric vehicles or come from overproduction. The technology offers maximum safety and durability and is ideal for a reliable energy supply. Compared to new batteries, up to 1 ton of CO₂, 3 MWh of energy, and 50 kg of resources can be saved per 10 kWh, maximizing efficiency and promoting resource conservation.

The investment depends on capacity, performance, use cases, location/network requirements, and integration costs. Voltfang provides a reliable price indication after a free electricity and project data analysis as part of a request for quotation. This allows for a realistic assessment of the investment amount, operating costs, savings (e.g., through peak shaving), and payback period.

The payback period for a commercial storage system can vary greatly, but is often between 3 and 7 years. It is influenced by several factors, including the acquisition costs, the amount of electricity costs saved (through self-consumption, peak load capping, and trading), possible subsidies, and the use of different business models (so-called multi-use approaches).

The service life of a commercial storage system depends on the technology and type of use. Modern battery storage systems from Voltfang are designed for many thousands of charging cycles and can achieve a service life of up to 20 years or more.

The commercial storage systems are three-phase AC-coupled and are typically connected to the building AC. Communication is standardized via Ethernet/Modbus TCP/IP for integration into building management systems, PV inverters, charging stations, or higher-level energy management systems.

Voltfang commercial storage systems are CE-compliant; the battery modules comply with UN 38.3. A multi-stage safety concept with battery management system (BMS), sensor technology, and cell-specific monitoring detects deviations at an early stage. Housing and cabinet solutions have high protection classes (indoor/outdoor) as well as coordinated protection and shutdown functions.

Commercial storage systems are generally eligible for subsidies under many programs; which subsidy program applies depends on the location and the measure and is reviewed on a project-specific basis. Voltfang systems are manufactured in Aachen (North Rhine-Westphalia).