How does an AC storage system work?

An AC storage system is a flexible energy storage system that stores surplus solar power and feeds it into the home grid when needed. It enables a high degree of energy self-sufficiency, especially for retrofitted PV systems. These storage solutions, such as those from DRBO Greenenergy, offer an efficient way to maximize the self-consumption of solar power and increase independence from the public electricity grid.

How does an AC storage system work?

An AC storage system stores solar power, which is fed into batteries from a photovoltaic system or the grid via an integrated inverter. The electricity is stored as AC power and can be fed back into the home grid when consumption is high to meet demand.

Unlike DC storage systems, the AC storage system operates independently of the PV inverter, allowing for easy retrofitting of older systems. Systems such as DRBO Greenenergy's SunLit solutions offer easy "plug & play" installation and high efficiency through bidirectional inverters that control both charging and discharging of the battery.

What advantages does an AC storage system offer over a DC storage system?

An AC storage system has several important advantages over a DC storage system. The biggest advantage is its easy retrofittability and higher compatibility with existing PV systems. Unlike DC storage systems, which are firmly coupled with the inverter, AC storage systems can be installed without interfering with the existing system. Installation costs are also often lower.

DRBO Greenenergy particularly recommends AC storage systems for existing installations or rented apartments, as no intervention in the PV system is necessary and the storage remains flexibly scalable.

Why is an AC storage system worthwhile for private customers?

An AC storage system is an attractive solution for private customers because it reduces dependence on the public grid and increases self-consumption. This leads to a significant reduction in energy costs, especially when surplus solar power is stored and used in the evening hours or on cloudy days.

For example, a household with a 5 kWh storage unit can save up to 30% on electricity costs annually. DRBO Greenenergy offers a solution with its modular systems, equipped with innovative SunLit technology, that can maximize self-consumption in the long term and significantly increase energy self-sufficiency.

How is an AC storage system installed?

The installation of an AC storage system is straightforward and is done in parallel with the existing household grid. A direct connection to the solar system is not necessary, which significantly simplifies installation. The devices are often supplied with pre-configured systems that can be seamlessly integrated into existing smart home systems.

Installation steps:

1. Selection of a suitable location (e.g., on the house wall or in the basement, in a frost-free and dry room).

2. Connection to the household circuit.

3. Integration into the energy management system.

4. Commissioning via app or display control.

Products from DRBO Greenenergy offer quick and efficient installation, allowing even private customers to benefit from the advantages of an AC storage system.

What capacity should an AC storage system have?

The ideal storage capacity depends on the size of the photovoltaic system and individual energy consumption. A guideline is a storage capacity of approximately 1 kWh per 1,000 kWh of annual consumption.

A modular system from DRBO Greenenergy allows for future expansion if energy demand increases.

Can an AC storage system support homeowners and tenants equally?

Yes, AC storage systems are ideal for both homeowners and tenants. For tenants, plug-and-play technology offers mobile solutions, while homeowners can benefit from larger, more stable systems that provide greater autonomy.

An AC storage system can be easily connected to balcony power plants or mini-PV systems, allowing solar power produced during the day to be used at night as well.

When does investing in an AC storage system pay off?

The investment in an AC storage system generally amortizes within 7 to 10 years. Factors such as electricity prices, self-consumption rate, and any subsidies can shorten the amortization period.

DRBO Greenenergy, through the integration of long-lasting batteries and intelligent charge management in its SunLit systems, offers particularly high efficiency, which contributes to rapid amortization.

What role does AC storage play in the energy transition?

AC storage systems make an important contribution to the energy transition by efficiently storing solar power and making it available at any time. This supports decentralized energy supply and reduces dependence on the central electricity grid.

The use of AC storage systems promotes sustainable energy production and consumption and enables households to actively participate in the energy transition. With products from DRBO Greenenergy, private households can help increase energy self-sufficiency while making a positive impact on the environment.

DRBO Greenenergy Expert Opinions

"AC storage systems are the next logical step for decentralized energy supply. They combine flexibility, sustainability, and economic efficiency in one product. Our SunLit energy storage systems offer users maximum efficiency and intuitive operation – ideal for maximizing self-consumption. At DRBO Greenenergy, we see this as a basis for the sustainable energy transition of the future."
— Technical Director, DRBO Greenenergy

What trends define the future of the AC storage market?

The future of the AC storage market will be shaped by innovations such as bidirectional charging, second-life batteries, and AI-powered energy management. These technologies will make AC storage systems even more efficient and networked, leading to a wider adoption of decentralized energy supply.

Companies like DRBO Greenenergy are already investing in these technologies to make energy storage smarter and more durable, ensuring they are optimally tailored to the needs of modern households and microgrids.

Conclusion

AC storage systems are a future-proof solution for households that want to use their solar power efficiently. They offer easy retrofittability, quick installation, and high economic efficiency. DRBO Greenenergy provides practical and sustainable solutions that increase self-consumption, reduce energy costs, and make an active contribution to the energy transition.

FAQs

1. What is the average cost of an AC storage system?
A high-quality AC storage system costs between €3,000 and €8,000, depending on capacity and features.

2. Can I expand my AC storage system?
Yes, many systems – including those from DRBO Greenenergy – are modular and can be upgraded.

3. Is an AC storage system compatible with every PV system?
Yes, thanks to the integrated inverter, it can be combined with almost all existing systems.

4. How long does an AC storage system last?
The lifespan is usually 10 to 15 years, depending on usage and temperature.

5. Do you need an electrician for operation?
For the initial installation, a specialist company should be consulted, especially for grid connection and VDE-compliant testing.