Battery scenario – with solar, dynamic contract and battery

Definition and purpose

The With solar + dynamic contract + battery scenario represents the fourth calculation in the annual savings chart.

It simulates the financial performance of a system that combines a photovoltaic (PV) installation, a dynamic electricity contract and a battery for energy storage. This scenario builds directly on the With solar + dynamic contract scenario by adding physical storage. Locally generated solar energy can be stored and used later instead of being exported to the grid.

The goal of this scenario is to show the baseline financial impact of adding a battery to a system that operates under dynamic electricity prices.

How the scenario is calculated

Total savings are calculated by combining several value streams that together determine the system’s financial performance. All calculations are performed on a time-based basis, matching production, consumption and storage availability per hour.

Included Value Streams

PV production

All energy generated by the PV system is included in the calculation. Solar production is continuously matched against on-site consumption and available battery capacity. Surplus energy is either stored in the battery or exported to the grid, depending on availability.

Dynamic pricing benefits

This scenario retains all characteristics of a dynamic electricity contract. Imported energy is priced using hourly dynamic electricity prices, while exported energy is rewarded at the market price at the moment of export. Imported electricity is often cheaper than under fixed pricing, especially during winter months, which directly affects total savings.

Battery usage

The battery adds value by storing surplus solar energy, for example during midday production peaks, and supplying that stored energy later when consumption occurs. This reduces the need to import electricity from the grid. The calculation assigns financial value to this stored and later consumed energy based on the avoided cost of grid imports at the applicable dynamic price.

Key sources of additional savings

Adding a battery introduces two important financial advantages.

Storing energy locally instead of exporting it helps avoid export-related costs or reduced compensation that apply in many energy setups. This increases the effective value of generated solar energy.

Using stored energy later also increases self-consumption. Energy drawn from the battery does not need to be purchased from the grid, reducing exposure to market prices. Avoided imports are valued at the dynamic electricity price that would otherwise have applied.

What this scenario does not include

This scenario represents a baseline battery setup and has clear limitations.

The calculation does not simulate smart optimisation or arbitrage. The battery is not charged from the grid during low-price hours, and there is no active control based on price spikes, negative prices or forecasts.

The battery is used exclusively to store solar surplus for later consumption. The behaviour reflects basic battery operation without advanced control by an EMS controller.

Difference compared to the with EMS scenario

This scenario shows the financial impact of passive energy storage only.

If you want to evaluate charging the battery during cheap grid hours, avoiding exports during negative prices, or actively optimising energy flows based on forecasts and price signals, these effects are not included here. They are calculated in the next scenario: With EMS.

Role in the annual savings analysis

In the annual savings chart, the With solar + dynamic contract + battery scenario demonstrates the financial benefit of adding storage to a dynamic contract, the value of increased self-consumption and the limitations of a non-smart battery setup.

It forms the bridge between passive energy storage and fully optimised, EMS-driven systems.