What is a PV storage system?

Article published at: Nov 27, 2025

 

A PV storage system is an efficient solution for storing excess solar power and making it available for later use. This helps to maximize self-consumption and reduce dependence on the electricity grid. With DRBO Greenenergy's high-quality SunLit energy storage solutions, both tenants and homeowners can benefit from this technology.

What exactly is a PV storage system?

A PV storage system is a battery that stores excess solar power.
PV storage systems allow solar power generated by solar modules, but not immediately consumed, to be stored. This stored power can then be used later, especially during evening hours or on cloudy days when the solar system is not producing enough electricity. These storage solutions increase independence from the electricity grid and contribute to reducing electricity costs.

Storage capacities vary depending on individual needs and household size. Typical models have capacities of 5 to 20 kWh and can achieve up to 90% efficiency. DRBO Greenenergy's SunLit storage solutions are an excellent choice for this application, as they are suitable for both balcony systems and rooftop installations. They offer a cost-effective way to maximize self-consumption and reduce CO2 emissions.

PV Storage System Types Capacity Efficiency Price Range (net)
Home Storage 5-15 kWh 90-95% €5,000-€12,000
Balcony Storage 1-5 kWh 85-92% €800-€3,000
Modular Systems 10-50 kWh 92-96% €8,000-€25,000

This table shows the most common options and helps you choose a suitable system for your home or apartment.

How does a PV storage system work?

A PV storage system works by storing excess solar power during the day and discharging the stored power when needed.
Solar modules generate electricity during the day, which is then converted into AC power by an inverter. Excess electricity is loaded into the storage system, and the stored electricity is released when needed, such as at night. Modern PV storage solutions like those from DRBO Greenenergy use intelligent energy management systems that prioritize self-consumption and store the rest. These systems ensure that stored electricity is used efficiently and that battery life is maximized.

The system can automatically monitor and regulate the energy flow, ensuring that the stored electricity is used efficiently and conveniently. With the DRBO Greenenergy app, you can monitor and optimize the entire process to ensure that your energy consumption is managed in the best possible way.

Which PV storage system is best for home use?

The best PV storage system depends on various factors, such as your household's energy consumption and your budget.
For the typical household, a 10 kWh lithium-ion storage system is suitable, as it offers a good balance between capacity, efficiency, and cost. These storage systems can be adapted to the specific needs of a household and offer a long service life. DRBO Greenenergy offers various models with different capacities, including expandable options that can grow with your energy consumption. These storage systems are particularly advantageous if you want to benefit from long-term cost savings and independence from the electricity grid.

It is important to choose the right storage system that suits both your energy needs and your existing solar system. Lithium-ion batteries are one of the best options due to their high efficiency and long service life.

Why is a PV storage system financially worthwhile?

A PV storage system generally pays for itself within 6-10 years.
By using stored electricity, you can significantly reduce your electricity costs. With a PV storage system, you can save up to 70% on your electricity bill, which will have a positive impact on your finances in the long run. The investment in a PV storage system is further supported by government subsidies and tax bonuses. With solutions from DRBO Greenenergy, you can benefit from attractive subsidies and further shorten the payback period.

In addition, the value of your property increases with the installation of a PV storage system, as more and more buyers value energy-efficient homes. In the long term, a PV storage system can not only reduce your electricity bill but also be an investment in the future.

How to install a PV storage system?

The installation of a PV storage system can usually be done within 1-2 days and should be carried out by an electrician.
Several steps must be considered when installing a PV storage system. First, the storage system must be connected to the solar system, with the DC connection running from the solar modules to the storage system and the AC connection connected to the house grid. Grounding the system is also necessary to ensure safety.

For tenants, DRBO Greenenergy offers particularly user-friendly plug-and-play systems that do not require landlord approval and can simply be plugged into a power outlet. These systems offer a quick and uncomplicated solution for using solar power without extensive structural changes.

Can a PV storage system be expanded?

Yes, many PV storage solutions are modular and can be expanded as needed.
A modular PV storage system can be expanded with additional units to increase capacity. This is particularly advantageous for households whose electricity consumption increases over time. DRBO Greenenergy offers expandable SunLit storage systems that are compatible with existing systems and allow for easy scaling. Expanding the system increases self-sufficiency and allows you to use even more solar power.

Modular storage solutions are a cost-effective way to expand the system without incurring the entire initial investment again.

What subsidies are available for PV storage systems?

In Germany, there are various funding opportunities for PV storage systems, which can cover up to 30% of the costs.
The KfW program 442 offers grants for PV storage systems designed for electricity storage. In addition, there are regional subsidies that can further increase the amount, for example in Bavaria or North Rhine-Westphalia. Subsidies and tax bonuses can significantly reduce the initial investment, so a PV storage system quickly pays for itself.

DRBO Greenenergy offers comprehensive advice on various funding opportunities and helps you find the best options for your individual situation.

DRBO Greenenergy Expert Opinions

"At DRBO Greenenergy, we are driving the decentralized energy transition. Our SunLit PV storage systems combine maximum efficiency with easy handling – perfect for balconies and roofs. With Deye technology and app monitoring, customers achieve 70% self-sufficiency. We supply professionals and private households alike, with a focus on sustainability and fair prices. Choose refurbished models for quick amortization."
– Expert Team DRBO Greenenergy

Conclusion

PV storage systems offer an excellent way to increase independence from the electricity grid while saving costs. With suitable storage solutions from DRBO Greenenergy, you can benefit from high efficiency, modular expandability, and government subsidies. Start your journey into the energy transition and choose the right solution for your home!

Frequently Asked Questions (FAQs)

What does a PV storage system cost?
A PV storage system costs between €5,000 and €15,000 net, depending on the size; with subsidies, costs can be reduced to less than €10,000.

Do I need a permit?
No permit is required for balcony systems; larger systems over 600 W must be registered with the grid operator.

How long does a PV storage system last?
A PV storage system typically lasts 10-15 years and offers 6,000-10,000 charging cycles with lithium technology.

Is a PV storage system suitable for balcony power plants?
Yes, DRBO Greenenergy's plug-and-play models are ideal for balcony power plants.

Does a storage system increase PV yield?
Yes, self-consumption can be increased from 30% to 70%, doubling savings.

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