Anyone who purchases household electricity intelligently no longer pays the same price per kilowatt hour every month. A dynamic electricity tariff makes this possible. The price changes hourly depending on supply and demand on the power market. It sounds complex, but it is not. Those who own or plan to install a solar system in particular can benefit significantly. But what are the actual costs of a dynamic electricity tariff, and when does switching make financial sense?

What is behind a dynamic electricity tariff and how does it work?

With a dynamic electricity tariff, the price is based on the hourly spot market prices at the European power exchange EPEX SPOT. This means that when a lot of wind and solar power is fed into the grid, prices fall. When everyone is cooking or heating at the same time, prices rise. The key difference compared to a traditional fixed price contract is that as a consumer you have direct influence over your costs through your own behavior or through smart control of your devices.

Since the revised Energy Industry Act came into force in 2022, energy suppliers with more than 100000 customers are required to offer dynamic tariffs. This has significantly stimulated the market for dynamic electricity tariff providers.

What costs should you expect with a dynamic electricity tariff?

This is the first question many people ask, and the answer is not one size fits all. The costs consist of several components:

• Variable energy price which is the hourly changing exchange price, often plus a small margin from the provider
• Grid charges which vary by region and are fixed
• Taxes and levies such as VAT, electricity tax, and concession fees which are unavoidable
• Base fee which is a monthly fixed amount that varies widely depending on the provider

A realistic example: if the exchange price is 10 cents per kWh, grid charges and levies add around 15 to 18 cents per kWh. During peak demand, the total price can rise to 35 to 40 cents per kWh. This means the overall cost depends heavily on your consumption behavior.

If you run your washing machine at midnight instead of at 6 pm, you can easily save 15 to 25 percent on electricity costs over the year without sacrificing much comfort.

How does a solar system benefit from a dynamic tariff?

This is where the real advantage lies. The combination of a dynamic electricity tariff and photovoltaics is more than the sum of its parts. If you have a PV system on your roof, you generate your own electricity during the day. At the same time, exchange prices tend to drop when the sun is shining because many PV systems feed electricity into the grid simultaneously.

In practical terms, this means you use your self generated solar electricity while the sun is shining and purchase low cost grid electricity during hours when prices are at their lowest. For flexibility at night or in poor weather, a battery storage system steps in and automatically charges when prices are low.

Dynamic electricity tariff and solar system working together with energy management:

• Maximize self consumption during the day with no need for grid electricity
• Charge the battery at night or during low price periods
• Schedule flexible loads such as heat pumps, wall boxes, or dishwashers during low tariff hours
• Feed surplus electricity into the grid and receive feed in compensation

This combination extracts the maximum value from every kilowatt hour.

What is dynamic tariff optimization and why does it matter?

Dynamic tariff optimization describes the process of aligning consumption and storage with hourly price signals. While this may sound theoretical, in practice an energy management system handles it automatically.

Modern systems such as Loxone, SolarEdge Home, or integrations via Home Assistant read the price curve for the next day and create a schedule. When should the battery charge? When should the heat pump run? When should consumption be reduced because prices are about to fall? This optimization runs automatically after setup and requires minimal manual input.

Manual adjustments can already deliver savings, but the full potential is clearly achieved through smart automation.

Dynamic electricity tariff and photovoltaics: which combination delivers the best results?

A dynamic electricity tariff combined with photovoltaics is particularly worthwhile if you operate a system of around 6 to 10 kWp and have a battery with a capacity of 5 to 10 kWh. The higher your self consumption rate, the less dependent you are on grid electricity and the less impact volatile prices have on your budget.

Example for a four person household in Lower Saxony:

• Annual consumption: 5000 kWh
• PV system: 9 kWp with 10 kWh storage
• Self consumption rate: around 65 percent
• Remaining grid consumption: about 1750 kWh per year
• Additional savings from dynamic tariff: approximately 120 to 180 euros per year

As your PV system and storage capacity increase, the relevance of dynamic electricity costs decreases because you simply purchase less electricity.

Is switching to a dynamic electricity tariff worthwhile without a solar system?

Yes, but with limitations. Without an intelligent electricity meter or smart meter, you cannot take advantage of variable pricing, and many households still do not have one. However, rollout is progressing quickly. By 2025, households with annual consumption above 6000 kWh are expected to receive a smart meter automatically.

Without a solar system, success depends heavily on user behavior. Those who are flexible and willing to shift usage can significantly reduce costs. Those with rigid daily routines may see little benefit and could even pay more.

Conclusion: when are dynamic electricity tariff costs truly worthwhile?

A dynamic electricity tariff is not hype but a tool. Like any tool, its value depends on how it is used. With a PV system, battery storage, and a smart energy management system, you can fully leverage low exchange prices. Costs drop to a minimum while you reduce your CO2 footprint and become more independent from energy market price fluctuations.

If you want to take your solar system and electricity tariff to the next level, PVPro Solar GmbH is your partner. We provide tailored advice on PV systems, storage solutions, and the optimal tariff strategy for your location in Lower Saxony, Hanover, Bremen, or Wolfsburg.

Get a free consultation now and create your personalized solar savings plan with PVPro Solar GmbH. Your step toward real energy savings starts here.

What is a dynamic electricity tariff?

A dynamic electricity tariff is a contract where the price per kilowatt hour changes hourly based on the current exchange price. Consumers can reduce costs by shifting usage to low price periods or using smart device control.

How high are the costs of a dynamic electricity tariff?

Costs consist of the variable exchange price, grid charges, taxes, and a monthly base fee. On average, flexible users can save 15 to 25 percent compared to a fixed price contract.

Which providers offer dynamic electricity tariffs in Germany?

Well known providers include Tibber, Ostrom, aWATTar, Voltego, and Rabot Charge. The market is expanding and more regional suppliers are introducing similar models.

Is a dynamic electricity tariff worthwhile with photovoltaics?

Yes, especially. Photovoltaics cover daytime demand while the battery charges during low price periods. This minimizes grid electricity costs.

Do I need a smart meter for a dynamic electricity tariff?

Yes. An intelligent meter is required because consumption must be measured and billed hourly. The rollout has been accelerating since 2025.

Can I earn money with a solar system under a dynamic tariff?

Indirectly, yes. You can feed surplus electricity into the grid and ensure that grid consumption occurs during the cheapest hours. Some providers also offer variable feed in compensation.

What does dynamic tariff optimization mean?

It refers to aligning electricity consumption with hourly price signals, either manually or automatically. Energy management systems now handle this automatically and significantly increase savings.