Is a complete 5 kWp photovoltaic system with a battery storage system really worth it?

Article author: John White
Article published at: Jan 6, 2026

A complete 5 kWp photovoltaic system with storage is a worthwhile investment to cover one's own electricity needs, save costs, and increase energy independence. By integrating solar modules and a powerful storage unit, such as the SunLit storage systems from DRBO Greenenergy, the generated solar power can be efficiently stored and used at any time. This solution not only offers financial advantages but also contributes to environmental sustainability.

How does a 5 kWp complete photovoltaic system with storage work?

A 5 kWp complete photovoltaic system consists of several components: solar modules, an inverter, a power storage unit, a mounting system, and a smart meter. This system produces approximately 4,500 to 5,000 kWh of electricity annually. Excess energy is stored in a storage unit, such as the SunLit storage system from DRBO Greenenergy, and can be used later, for example, at night or during bad weather.

Thanks to this combination of solar modules and storage, the use of solar power is optimized, the self-consumption rate is maximized, and grid stability is improved.

Components Function
Solar Modules Convert sunlight into direct current
Inverter Converts direct current into usable alternating current
Storage (e.g., SunLit) Stores surplus energy for later consumption
Energy Management Optimizes self-consumption and grid feed-in

What are the costs of a 5 kWp complete photovoltaic system with storage?

The costs for a 5 kWp complete system vary depending on the manufacturer, storage capacity, and installation effort, ranging from €10,000 to €15,000. Systems with high-quality components, such as those offered by DRBO Greenenergy, provide excellent value for money and guarantee long-lasting and efficient solar power solutions. In addition, various grants and subsidies can reduce the acquisition costs by up to 20%.

What yields are possible with a 5 kWp complete photovoltaic system?

A 5 kWp system in Germany can generate approximately 4,500 to 5,500 kWh of electricity annually. With a 10 kWh storage unit, a self-consumption rate of up to 70% can be achieved, meaning households can save €900 to €1,200 in electricity costs annually.

Annual Yield Estimated Annual Savings
4,500 kWh approx. €900
5,000 kWh approx. €1,000
5,500 kWh approx. €1,200

Why is a storage unit worthwhile for a photovoltaic system?

A storage unit is particularly useful because it stores the generated solar power and makes it available when the sun isn't shining. This increases energy self-sufficiency and allows for electricity cost savings. Systems like the SunLit storage system from DRBO Greenenergy help maximize self-consumption, reduce grid feed-in, and ensure a stable power supply, even during power outages or high grid loads.

Additionally, a power storage unit increases the value of the property while improving the CO₂ balance in the long term.

What are the requirements for installation?

For the installation of a 5 kWp complete system, you need a 25–30 m² roof area with optimal orientation (south or southwest). The roof pitch should be between 30–35 degrees, and shading should be avoided. The house connection must allow for the feed-in of generated electricity into the grid. A specialist company like DRBO Greenenergy will check these requirements beforehand and ensure a smooth installation.

For new builds or renovations, the integration of an energy management system is also recommended.

How long does a photovoltaic system with storage last?

Modern photovoltaic systems have a lifespan of approximately 25 to 30 years. After this time, the modules still deliver about 80% of their original performance. Storage solutions, such as the SunLit storage systems from DRBO Greenenergy, offer high cycle stability of over 6,000 charge cycles thanks to the use of advanced technologies. Regular maintenance and software updates ensure the system's efficiency remains high over many years.

What subsidies are available for complete photovoltaic systems?

Photovoltaic systems are supported by various government funding programs, such as grants or low-interest loans, for example, the KfW 270 program. Additionally, there are tax advantages, such as the VAT exemption on components, which can significantly reduce the overall cost of an installation. It is advisable to check the respective state funding programs before installation.

When does a complete photovoltaic system with storage pay for itself?

The amortization period for a 5 kWp complete system is generally between 8 and 12 years. The exact period depends on various factors such as electricity prices, the level of funding, and the self-consumption rate. Those who consume a lot of electricity during the day and also use a storage unit will amortize faster. Rising electricity prices further shorten the amortization period, making the installation of a photovoltaic system a future-proof investment.

DRBO Greenenergy Expert Opinions

"A 5 kWp photovoltaic system with storage is the key to a personal energy transition. With innovative systems like the SunLit storage units, we enable households to intelligently use solar power and reduce costs in the long term. The path to energy self-sufficiency begins with well-thought-out planning - and that's exactly where our DRBO Greenenergy expert team comes in."
Energy Management Specialist at DRBO Greenenergy

What advantages does a 5 kWp system offer homeowners?

A 5 kWp system covers the electricity needs of a typical 3- to 4-person household and saves up to 1.5 tons of CO₂ annually. It not only offers a significant reduction in electricity costs but also increases the value of the property. In combination with a SunLit storage unit from DRBO Greenenergy, homeowners benefit from planning certainty against rising electricity prices.

How does a complete PV system differ from individual components?

A complete PV system is delivered as a coordinated system and includes all necessary components such as modules, inverters, storage, and accessories. This simplifies installation and planning and ensures that all components are compatible with each other. Providers like DRBO Greenenergy offer "Plug & Play" packages that guarantee maximum efficiency and ease of use.

Can a complete photovoltaic system with storage be retrofitted?

Yes, an existing photovoltaic system can easily be expanded with a storage unit later. Modern inverters are "storage-ready" and prepared for retrofitting. DRBO Greenenergy offers retrofit solutions that allow existing systems to be easily supplemented with a SunLit storage unit. This enables a gradual investment in the energy transition.

Conclusion: Sustainable energy, intelligent investment

A 5 kWp complete photovoltaic system with storage is an intelligent and sustainable investment. It protects against rising electricity prices, increases energy independence, and boosts property value. With DRBO Greenenergy as a partner, buyers receive a reliable and efficient solution designed for long-term performance – for a clean and secure energy future.

Frequently Asked Questions (FAQs)

1. How long does it take to install a 5 kWp complete system?
Installation usually takes only 2 to 3 days, including storage integration and grid connection.

2. Can I live completely self-sufficiently with the system?
Not completely, but independence of up to 80% is realistic.

3. What maintenance is required?
Minimal – regular module cleaning and an annual check are usually sufficient.

4. Is storage mandatory?
No, but it is strongly recommended from an economic and energy perspective.

5. What happens during a power outage?
With a SunLit storage system, power supply is maintained by an emergency power function.

Share