The use of alternative energy sources helps to reduce costs. However, an overall concept must be established here. This is the only way to achieve optimum economic efficiency. The media are selling this as the future. However, due to the discontinuous production of electricity, there are also limits in terms of economic efficiency.

Many companies have recently invested heavily in large photovoltaic (PV) systems, particularly on production hall roofs with outputs of 1 MW and above. However, current political developments have led to a reduction in feed-in tariffs, meaning that the yields often do not even cover the loan installments with interest. Even with internal use, this area must therefore be subsidized.

However, there are various options available to increase yields. Economic and legal approval checks are essential for every option.

 

Variants for increasing yield

 

Variant A: Installation of a battery storage system

By installing a battery storage system, surplus energy that is not used immediately during operation can be stored on site and used later. This enables better use of self-generated PV electricity throughout the day. However, additional energy must still be purchased when PV production is low.
*Cost-effectiveness:* The investment costs for battery storage systems are currently high and refinancing takes more than 10 years.

 

Variant B: Dual use with two-way battery

The use of a battery as bidirectional storage creates an additional source of income. The battery is rented and functions on the one hand as energy storage and on the other hand for participation in electricity trading. The surplus electricity is stored and can be used flexibly for operation or trading.
*Economic efficiency:* The battery is used more efficiently through the business model, which can potentially generate additional income.

 

Variant C: Production communities

In a generation community, regional producers and consumers come together to use the electricity generated jointly. The respective grid connection costs are decisive here and require precise calculation.

 

Approval requirements and regulations

Permits are required depending on the use of the electricity generated:

  • Own use in commercial operations: If the electricity is to be used within the business, a commercial license is required for the PV system.
  • Exclusive feed-in to the grid: If use is exclusively by feeding into the grid, no commercial license is required.

The same approval requirements apply to battery systems. In view of rapidly changing legal and regulatory requirements, a careful examination of the applicable provisions is essential. The following must be taken into account:

  • OIB guidelines
  • Regulations and statutory provisions
  • Standards and insurance requirements

Note: Before any decision is made to install a system, both the economically optimal solution and the approval requirements should be checked. We will be happy to assist you if you have any questions.