If you buy it with a power store, you can use more solar power. This makes you more independent from your electricity supplier and reduces your electricity costs. If you invest in a photovoltaic system without storage, on average, you can use about 30% of the solar energy production yourself. Supplementing the electricity storage of the photovoltaic system, it is already 50-80%.

For new photovoltaic systems, it almost always makes sense to purchase electricity storage because solar is so cheap right now. 10-12 cents per kWh. Therefore, using solar power to generate electricity is much cheaper than receiving normal electricity from the grid. By storing electricity, you can increase the amount of solar energy you use, thereby saving on your electricity costs.

Generally speaking, the price of electricity storage ranges from about 4,000 euros to 12,000 euros. Small memories as low as 8 kWh cost around €1,000 per kWh of storage capacity, while larger memories with storage capacities of 10 to 16 kWh already cost around €700 to €900 per kWh of storage capacity.

Take advantage of funding opportunities

With numerous regional and federal funding programs, you can significantly reduce your storage investment costs. KfW Bank issues low-interest loans KfW270 for the installation of photovoltaic systems with battery storage. Financing can also be provided for subsequent installation of storage or individual PV systems.

In addition, some federal states and municipalities have developed dedicated regional energy storage subsidy schemes. The state of Baden-Württemberg encourages storage with a subsidy of 200€ per kWh of available storage capacity. Special services are also available in the cities of Munich, Cologne, Düsseldorf and Münster. Electricity storage subsidy program.

Note:You will usually need to apply for funding before commissioning an installation operation.

Choosing the power storage size that's right for you depends on many factors. An important metric for determining storage size is your annual electricity consumption. Of course, the higher your electricity usage, the greater your power usage. This is also crucial for correct storage dimensions if you already have a photovoltaic system installed on your roof. With a system where your power consumption is relatively large (e.g. 10 kWp is 3,000 kWh) and you have a lot of excess power and instead of feeding it into the grid, a lot of memory here can help you achieve a high level of automation .

Do you want to become extremely self-sufficient and independent of your current electricity supplier? In this case you should make the memory size slightly larger.

Prevent power outages

If the power supply needs to continue even in the event of a power outage, a so-called emergency power memory should be selected. The emergency power feature ensures that your storage device continues to provide power even during a power outage. In extreme cases, it can run for days without electricity. The RCT's battery has emergency power capabilities.

Electric cars? - Thinking about future developments

Are you planning to buy an electric car in the future, or do you expect your electricity consumption to increase for other reasons? You should then buy larger power storage now, or choose a modular model to expand storage capacity later.

The first clue to determine storage size is your annual electricity consumption. The average electricity consumption of a family of four is 4,200 kWh. However, in order to calculate accurate electricity consumption, you should obtain a separate average from your most recent electricity bill.

Average annual electricity consumption: