Dyness STACK280 Powers 917.5 kWh Energy Storage System at Volkswagen Dealership in Austria

Commercial energy storage is moving from a technical add-on to a practical business tool, particularly for companies combining solar generation, high daytime electricity demand and growing EV charging requirements.

A new project in Scharnstein, Austria, provides a useful example. Autohaus Almtal, a Volkswagen dealership, has installed a 917.5 kWh Dyness STACK280 battery energy storage system to manage its increasingly complex electricity demand. The installation combines eight battery clusters with eight modules in each cluster and is designed to support showroom operations, workshop equipment, solar self-consumption and expanding electric vehicle charging infrastructure.

For installers, EPC companies and commercial energy users, the project demonstrates why C&I energy storage is increasingly relevant in locations where simply increasing the grid connection may be expensive, slow or technically difficult.

Why an Automotive Dealership Needs Nearly 1 MWh of Battery Storage

A modern vehicle dealership is a much more demanding electrical environment than it may first appear.

Showroom lighting and building services create a relatively stable base load. Workshop equipment introduces shorter periods of significantly higher consumption, while EV chargers can add concentrated power demand when several vehicles charge at the same time.

That combination creates two different energy problems. The first is how much electricity the business consumes over the day. The second, and often more expensive issue, is when that electricity is required.

Dyness explains that expanding grid capacity can involve substantial infrastructure costs and long planning periods. Autohaus Almtal therefore needed a solution that could manage peak consumption while making better use of locally available renewable electricity.

This is exactly where commercial battery storage becomes useful. Instead of treating every short demand peak as a reason to increase the permanent grid connection, a battery can temporarily supply part of the required power.

917.5 kWh of Dyness STACK280 Energy Storage

The Austrian installation uses a 917.5 kWh nominal Dyness STACK280 system, configured as eight battery clusters.

Dyness states that the system can store surplus solar generation when renewable electricity is available and discharge that energy during periods of higher consumption. In practical terms, this allows electricity generated during lower-demand periods to be shifted into workshop peaks or EV charging periods later in the day.

Each STACK280 cluster supports up to 200 A of continuous charge and discharge current. With eight clusters installed, the dealership has a substantial flexible energy reserve available for managing commercial loads.

The important point is that battery capacity alone does not describe the value of a C&I energy storage system. A 917.5 kWh battery is useful only when its power capability, control strategy and connection architecture are matched to the site’s actual load profile.

For this reason, commercial battery design should always begin with interval consumption data, PV generation and grid limits rather than simply selecting the largest storage system that physically fits on site.

Solar Self-Consumption Becomes More Valuable with Storage

For a business with solar PV, battery energy storage can change the way locally generated electricity is used.

Without storage, excess solar production may be exported when the dealership does not need it. Later in the day, the same business may need to import expensive electricity from the grid to run workshop equipment or charge electric vehicles.

The battery makes it possible to move part of that solar electricity from one period to another.

This is particularly relevant for commercial solar projects because the financial value of one kilowatt-hour depends heavily on what would otherwise happen to it. A kilowatt-hour that replaces high-priced grid consumption is usually more valuable than the same kilowatt-hour exported during a low-price period.

A well-designed energy storage system therefore does not simply increase solar self-consumption. It can also change the economics of the complete napelemes rendszer.

EV Charging Is Becoming a Major Driver of C&I Battery Demand

The Autohaus Almtal project is particularly relevant because automotive businesses are rapidly becoming energy hubs.

Traditional dealerships were primarily electricity consumers. Increasingly, they also operate multiple EV chargers, demonstration vehicles, customer charging points and workshop equipment for electric mobility.

The challenge is not necessarily annual electricity consumption. It is simultaneous power demand.

If several high-power chargers operate at the same time as workshop machinery and normal building loads, the site can create a short but very high peak. Increasing the grid connection to cover these occasional events may be expensive.

A commercial solar battery can help reduce this peak by supplying part of the load for a limited period.

For installers and EPC companies, this means EV charging projects should increasingly be assessed together with solar panels, C&I energy storage, grid capacity and energy management, rather than treating the charger as an isolated electrical load.

STACK280 Can Scale Beyond 2 MWh

One of the most important features of the Dyness STACK280 platform is its scalability.

Dyness describes the product as a rackless, stackable C&I energy storage system designed for relatively straightforward deployment. Up to 12 battery clusters can be connected in parallel, allowing system capacity to expand beyond 2 MWh.

Autohaus Almtal currently uses eight clusters, meaning the installation still has room for future expansion within the product architecture.

That could become useful as the dealership adds more EV charging capacity or its electrical consumption increases.

For commercial users, this kind of modularity is important because energy requirements rarely remain static for the full lifetime of a battery system. EV fleets grow, businesses expand, new electrical heating loads appear and solar PV installations are enlarged.

A scalable energy storage platform can reduce the need to replace the complete battery system when those changes occur.

What the Project Says About Grid Capacity

The Austrian project also illustrates a wider European problem: grid connection capacity is becoming increasingly valuable.

In many commercial projects, the question is no longer whether the company can purchase enough electricity over a year. The more difficult question is whether the local electrical infrastructure can supply the required instantaneous power.

Grid reinforcement may involve new transformers, switchgear, cables and network studies, as well as long approval and construction schedules.

Battery storage offers another option.

By charging during lower-demand periods and discharging during peak consumption, the battery can reduce the amount of power that must be drawn from the grid at any one moment.

This does not mean a battery can replace every grid upgrade. If long-term average consumption exceeds the available connection capacity, physical network reinforcement may still be required. But for short, concentrated peaks, energy storage can be a much more flexible tool.

Commercial Energy Storage Is About More Than Backup

The Dyness project is a good example of why it is misleading to describe every battery system primarily as backup power.

For commercial users, battery storage may create value through several operating strategies at the same time.

At Autohaus Almtal, the system is intended to improve solar utilisation, support high workshop and EV charging loads and reduce exposure to peak-period electricity costs. Dyness also presents the battery as a way to reduce immediate pressure for grid expansion.

That turns energy storage into an active operating asset rather than equipment waiting for a power failure.

The financial value of the battery depends heavily on how frequently it cycles and the difference between the cost of electricity when the system charges and the value of electricity when it discharges.

Dyness gives an illustrative scenario in which shifting approximately 100–200 full-equivalent cycles annually and capturing an electricity-price difference of €0.08–€0.15/kWh could potentially create around €7,000–€26,000 per year in energy-cost optimisation, before system losses and other operating factors are considered. The manufacturer explicitly notes that actual savings depend on PV generation, load profile, electricity tariffs and operating strategy.

That figure should therefore not be treated as a guaranteed project return.

Why Load-Profile Analysis Matters Before Buying a Commercial Battery

A C&I solar battery should never be sized from monthly electricity bills alone.

Monthly bills tell an installer how much energy was consumed but usually do not explain exactly when it was consumed. Battery sizing requires much more detailed information.

For a dealership, the designer needs to understand when workshop equipment operates, when vehicles charge, what the site base load looks like overnight and how much solar generation is available during working hours.

In a professional project, 15-minute or hourly consumption data is often far more useful than the annual kWh total.

The same applies to other commercial applications such as warehouses, hotels, supermarkets, factories and logistics centres.

Two businesses can consume exactly the same amount of electricity annually and still require completely different battery systems because their peak power and load profiles are different.

Safety and Long-Term Commercial Operation

Dyness states that STACK280 incorporates an intelligent aerosol fire-extinguishing system capable of identifying and suppressing fire risk within five seconds. The manufacturer also specifies an 8,000+ cycle life and a 10-year warranty for the platform.

These specifications are especially relevant in a commercial environment where the energy storage system is expected to cycle regularly rather than remain largely idle.

Battery safety, however, involves considerably more than cell chemistry or integrated suppression.

A complete C&I project should also consider electrical protection, thermal conditions, installation clearances, emergency access, fire strategy, monitoring, commissioning procedures and applicable local regulations.

For B2B procurement, these requirements mean the solar battery should be evaluated as part of the complete energy storage system rather than simply purchased according to €/kWh.

What Installers Can Learn from the Austrian Project

The Autohaus Almtal installation highlights a change that is taking place across the commercial solar market.

Customers increasingly have several electrical systems interacting at the same site: rooftop solar PV, workshops, heat pumps, EV chargers, battery storage and the public grid.

The installer therefore needs to understand how these systems influence each other.

A commercial solar inverter determines how PV generation enters the electrical system. The battery determines how much energy can be shifted between different times. The energy management system decides when charging and discharging should happen, while the grid connection ultimately defines how much external power is available.

The strongest commercial projects are those where these components are designed together from the beginning.

A Strong Use Case for Solar Wholesalers and EPC Companies

For a solar wholesaler or solar distributor, C&I energy storage is also a very different procurement market from residential solar batteries.

A project approaching 1 MWh is unlikely to be ordered like a standard webshop product. It requires project-specific configuration, technical documentation, delivery scheduling and commissioning coordination.

Professional procurement needs to confirm the exact battery configuration, number of clusters, power conversion equipment, communication architecture, protection, installation environment and project delivery schedule.

European warehouse stock may still matter for spare parts and urgent replacement components, but large systems will often require direct project allocation and coordinated logistics.

This is why C&I storage increasingly rewards solar PV suppliers that can provide technical and project support rather than simply listing a battery price.

From Electricity Cost to Strategic Energy Management

The Scharnstein project shows why commercial battery storage is becoming particularly relevant in sectors affected by electrification.

Autohaus Almtal is not installing nearly 1 MWh of energy storage simply because batteries are becoming popular. The system addresses several real operating problems at once: fluctuating workshop demand, expanding EV charging, renewable energy utilisation and limited grid capacity.

That is likely to become a familiar pattern across Europe.

Car dealerships, logistics centres, factories, supermarkets and other businesses are adding electrical loads faster than many local grids can be reinforced. At the same time, commercial solar panels are generating larger amounts of inexpensive daytime electricity.

C&I battery storage connects those two developments.

For professional installers, EPC companies and B2B buyers, the opportunity is increasingly in complete systems that combine solar PV generation, commercial solar inverters, energy storage, EV charging and intelligent load management.

The Dyness STACK280 installation in Austria is a practical example of what that transition already looks like.

How large is the Dyness energy storage system at Autohaus Almtal?

The Volkswagen dealership in Scharnstein, Austria, uses a 917.5 kWh Dyness STACK280 system configured across eight battery clusters.

Why does the dealership use battery storage?

The system stores excess renewable generation, shifts electricity into higher-demand periods and helps manage concentrated workshop and EV charging loads without relying solely on a larger grid connection.

How many STACK280 clusters can operate in parallel?

Dyness states that up to 12 clusters can be connected in parallel, allowing the platform to scale beyond 2 MWh.

What is the maximum continuous current of a STACK280 cluster?

Each cluster supports up to 200 A continuous charge and discharge current, according to the project information published by Dyness.

Can commercial battery storage support EV charging?

Yes. A properly designed C&I battery can supply additional power during concentrated charging periods, reduce grid peaks and store solar electricity for later vehicle charging.

What cycle life does Dyness state for STACK280?

Dyness states 8,000+ cycles and a 10-year warranty for the STACK280 platform.