Peak loads make energy more expensive

Car dealerships and workshops, which consume more than 30,000 kilowatt hours (kWh) of electricity each year, can cut costs with an individually tailored commercial energy contract.

Businesses pay a unit rate for the kilowatt hours they consume and a demand charge for the highest peaks in consumption. This means that reducing major peaks in consumption is an effective way to cut electricity costs.


For operators of high-speed charging stations, peaks in consumption (known as peak loads) are a major expense. Since electric vehicles have increasingly high-performance batteries, rapid charging requires an ever greater output. But the higher the output, the higher the peak load — and the bigger the power bill for the charging station’s operator.

Storage systems are a valuable tool here. The electric car is charged from the battery storage system instead of the public grid. The storage system then recharges itself with power from the grid, but at a slower rate, which avoids generating peak loads.


If you also invest in a rooftop photovoltaic installation, you’ll be sending out a clear signal in favour of environmentally friendly mobility. On top of that, you’ll need much less power from the grid. Our lithium-ion storage systems have a lifespan of up to 30 years, enabling you to plan confidently for the long term and realize significant energy savings.

A battery storage system offers a range of benefits:

  • Pay less for peak energy loads
  • Pay less for grid connection
  • Use more of the power you have generated
  • Gain independence from utility companies and rising energy prices
  • Project an environmentally friendly image

The most important points to consider when choosing a storage system are:

  • High-speed charging (1C)
    To enable rapid recharging of electric vehicles, the storage system should offer high charging power. 1C means that the storage system can be fully charged or discharged in one hour. If the system is only rated 0.5C, you’ll need a system that’s twice as large to guarantee the same charging power. The larger the storage system, the higher the purchase price.

  • High efficiency rating
    The storage efficiency rating reflects how much of the stored energy can actually be used. Ideally, it should be over 95%. Storage systems also require energy when in sleep mode, e.g. to power the battery control system. The best systems use less than 5 watts for this.

  • Expansion and exchange
    In most storage systems, cells and batteries can only be exchanged or added within the first few months of operation. You should choose a system which can still be expanded years later.

  • Stringent safety standardst
    The battery cells you choose should guarantee traceability and excellent quality. Leading manufacturers offer premium-quality cells which won’t ignite even when punctured by a metal spike. Monitoring the battery cells helps to identify at an early stage when maintenance is needed.

  • Long cycle life
    Battery storage systems undergo wear and tear with every charging cycle. The number of full charging cycles reflects how often the storage system can be charged and discharged before it deteriorates too severely. You should choose a product with the highest possible number of full cycles or guaranteed cycles.

  • Outdoor installation
    Where the storage system can be installed depends not only on its size and weight, but also on external factors such as atmospheric humidity. There are modular systems which can be installed even in small spaces. Some storage systems can also be installed outdoors, which requires additional features such as a particularly robust housing or temperature control.


  • Use: On-Grid
  • Energy generation: 300 kWp photovoltaic energy
  • TESVOLT – capacity: 250 kWh
  • SMA – output: 72 kW
  • Commissioned: 2016
  • Objective: Expanding grid connection output, increasing self-consumption, emergency power

Get in touch today.

Do you have questions, or are you interested in a robust TESVOLT storage system? We are happy to help — please don’t hesitate to get in touch!