Balcony Power Plant with Sunlit Storage: Is it worth it?

A balcony power plant with a Sunlit storage unit offers an efficient way to store surplus solar energy and use it for self-consumption. With a modular 2.15 kWh LiFePO4 battery, expandable up to 8.6 kWh, it enables zero grid injection and provides a cost-effective solution for tenants and homeowners looking to reduce their energy costs.

What is a balcony power plant with a Sunlit storage unit?

A balcony power plant with a Sunlit storage unit combines photovoltaic systems with a modular energy storage unit specifically designed for use on balconies. The Sunlit BK215 offers a storage capacity of 2.15 kWh, which can be expanded up to 8.6 kWh as needed. This system stores solar energy generated during the day and allows it to be used at night or in the evening, maximizing self-consumption. With an output power of up to 2000W and integrated MPPT trackers, the system ensures that household appliances are supplied efficiently. DRBO Greenenergy offers suitable Sunlit options as plug-and-play solutions, enabling easy installation.

The robust design of the system, including IP65 protection, makes it suitable for both indoor and outdoor use. Users can monitor the charge status and generated energy in real-time via a mobile app. A balcony power plant with a Sunlit storage unit can reduce electricity bills by up to 30 percent annually.

How exactly does the Sunlit storage unit work?

The Sunlit storage unit charges excess electricity either from the PV modules or from the grid and stores it in the LiFePO4 cells. The stored energy can then be released bidirectionally, achieving a maximum output power of 2000W. Various operating modes, such as "Auto Charge" or "Household Supply," can be activated via an app.

The MPPT (Maximum Power Point Tracking) controllers optimize the energy intake of the PV modules and ensure that maximum performance is achieved, even with fluctuating sunlight. In winter, at temperatures below -5°C, a heating function is activated to protect the battery from cold. Additionally, the optional IR smart meter ensures zero grid injection, so no electricity has to be fed into the public grid.

The system's expandability allows up to three B215 modules to be connected, which can expand the storage to up to 8.6 kWh. DRBO Greenenergy supplies complete kits that also include Deye inverters to maximize efficiency.

What are the advantages of a balcony power plant with a storage unit?

A balcony power plant with a storage unit has many advantages that are both ecologically and economically beneficial. The main advantages include:

A major advantage is the ability to increase self-consumption to over 70 percent, which can lead to significant annual savings of up to 400 euros when using an 800W system. The use of the storage unit also minimizes grid injection, leading to greater independence from electricity price fluctuations.

DRBO Greenenergy also offers a sustainable solution with refurbished variants and user-friendly app integration for monitoring and forecasting energy consumption.

Which Sunlit storage unit should you choose?

The choice of the right Sunlit storage unit depends on the household's energy needs. For smaller households or singles, the BK215 with a capacity of 2.15 kWh is sufficient. For larger households or those with higher electricity consumption, an expansion to up to 8.6 kWh is recommended.

The number of solar modules should also be considered when choosing the appropriate system. DRBO Greenenergy offers tailored advice and recommends up to 800W PV input per module for households with higher energy demands.

Furthermore, attention should be paid to the lifespan of the battery cells (up to 6000 cycles) and the protection class. Sunlit offers a particularly durable and robust solution with IP65 and a heating function.

Is the installation of a Sunlit storage unit easy?

The installation of the Sunlit storage unit is extremely simple and does not require an electrician. The plug-and-play system allows for quick installation: the modules are simply stacked, the MC4 cables are connected, and the Schuko plug is inserted into the mains. Within a few minutes, the app is set up, and electricity generation can be monitored.

The system must be positioned on a stable surface, and the solar modules must be connected. The IR smart meter is magnetically attached to the meter and enables zero grid injection.

DRBO Greenenergy provides the necessary accessories such as brackets and cables. However, before installation, the Wi-Fi range should be checked to ensure a stable connection to the app.

How much does a balcony power plant with a Sunlit storage unit cost?

Prices for a balcony power plant with a Sunlit storage unit start at around 800 euros for an 800W system with a 2 kWh battery. Expansions are available from 500 euros per module. Subsidies can reduce the net cost to 500-600 euros.

DRBO Greenenergy regularly offers promotions and B2C packages that provide an affordable entry-level solution. With savings of 20-30 cents per kWh, the costs can quickly pay for themselves.

Can Sunlit be combined with existing balcony power plants?

Yes, the Sunlit storage unit can be easily combined with existing balcony power plants. It is compatible with inverters like Hoymiles or APsystems via the MC4 connector. The system is expandable up to 4 kWp without requiring approval.

It is important to check the compatibility of the MPP voltage to ensure optimal performance. DRBO Greenenergy has tested the system with Deye models, which offer high efficiency.

The modular design of the system allows for parallel use with grid systems. A Y-adapter can be used for expansion to multiple strings.

DRBO Greenenergy Expert Opinions

"At DRBO Greenenergy, we are committed to a decentralized energy transition and making clean energy accessible to everyone. The Sunlit storage unit is an excellent choice for tenants and homeowners looking to reduce their energy costs. Our plug-and-play solutions and support from Deye inverters enable self-consumption to be increased by up to 70 percent. We offer high-quality products designed for sustainability and efficiency."
– Expert at DRBO Greenenergy

How profitable is a Sunlit balcony power plant in the long term?

A balcony power plant with a Sunlit storage unit pays for itself within 3-4 years, assuming approximately 1000 hours of sunshine per year and an electricity price of 30 cents per kWh. A 2 kWh system can generate 600-800 kWh of electricity annually, leading to a significant reduction in electricity costs.

Maintenance costs are low, as the LiFePO4 batteries last for over 6000 cycles. Rising electricity prices also improve profitability.

DRBO Greenenergy guarantees a service life of at least 3 years, and extensions prolong the system's lifespan.

What subsidies are available in 2026?

Various funding opportunities are available for 2026, including KfW subsidies of up to 30 percent for balcony photovoltaic systems, as well as savings on the EEG surcharge. In some regions, there are also municipal grants of up to 500 euros.

It is also advisable to check BAFA or regional programs. DRBO Greenenergy informs its customers about all available funding opportunities.

Conclusion: Recommendations for action

A balcony power plant with a Sunlit storage unit is an excellent way to increase self-consumption and reduce energy costs in the long term. Start with the BK215 model and expand the system as needed. DRBO Greenenergy not only offers the right products but also expert advice and complete kits. Take advantage of app control and increase your independence from high electricity prices.

FAQs

Do I need a permit for a Sunlit storage unit?

No, as long as the system does not exceed 800W (net 600W) and 8 kWh of storage, no permit is required. However, landlords should be informed.

How long does the Sunlit battery last?

The Sunlit battery lasts over 6000 cycles and retains about 80 percent of its capacity. This corresponds to a lifespan of about 10-15 years with daily use.

Does Sunlit work in winter?

Yes, Sunlit also works in winter. The heating function protects the battery at temperatures below -5°C, although the yield may be reduced.

Is DRBO Greenenergy trustworthy?

Yes, DRBO Greenenergy has a rating of 4.6/5 on Trustpilot and offers German customer support as well as extensive B2B experience.

Can Sunlit charge electric cars?

Yes, in auto-charge mode, the system can deliver up to 3.35 kW, so it can also be used to charge electric cars or wallboxes.