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01.07.2026
The Sunlit Balcony Power Plant Storage BK215 is a modular LiFePO4 storage unit with 2.15 kWh capacity, expandable up to 8.6 kWh. It stores surplus solar power during the day, increases self-consumption rates, and offers plug-and-play installation. Compatible with Deye and Hoymiles inverters, the BK215 provides maximum flexibility for balcony power plants and easy app monitoring for households with high energy demands.
What makes the Sunlit BK215 special?
The BK215 stands out with LiFePO4 technology, offering over 8,000 charging cycles, modular expandability, and two MPPT inputs for up to 1,600 W PV power. Its plug-and-play functionality allows for quick installation without an electrician. With the Sunlit app, charge status and consumption can be monitored in real-time. DRBO Greenenergy integrates the BK215 into complete systems for maximum energy efficiency.
| Feature | Advantage |
|---|---|
| Capacity | 2.15 kWh, expandable to 8.6 kWh |
| Charge Cycles | Over 8,000 |
| PV Input | 1,600 W (2x MPPT) |
| Output | 1,920 W with bypass |
How does the Sunlit BK215 work?
The BK215 stores surplus solar energy during the day and releases it in the evening or at night. MPPT inputs optimize PV performance, while MC4 outputs supply power to the inverter. The app allows real-time monitoring of charge status and consumption. Excess solar power is fed directly into the battery, reducing grid injection, allowing households to achieve up to 70% self-consumption.
What are the technical specifications of the BK215?
The storage unit features 2.15 kWh capacity, 48V/43Ah, IP65 protection, and dimensions of 48x29x26 cm at 32.5 kg weight. Two PV inputs support up to 1,600 W, and outputs deliver up to 1,920 W. Expandable to 8.6 kWh with B215 modules, it supports up to 4 kW PV input, Wi-Fi app for remote control, and bypass function for continuous operation when fully charged.
How to install the Sunlit BK215?
Installation is simple: plug PV cables into the MPPT inputs, connect outputs to the inverter's MC4, plug in the power cord, and set up the app via QR code. No drilling or electrician needed. DRBO Greenenergy offers complete packages with mounting accessories for secure setup and quick commissioning.
Is the Sunlit BK215 compatible with all inverters?
Yes, the BK215 supports Sunlit, Deye, TSUN, Hoymiles (OpenDTU), and APsystems inverters. With EV3600 inverters, bidirectional use for wallboxes and dynamic tariffs is also possible. MC4 connectors are standard, adapters are available if needed. DRBO Greenenergy tests all combinations for seamless operation.
How to expand the Sunlit BK215?
Up to three additional B215 batteries can be connected to increase capacity to 8.6 kWh. Modules are simply stacked and wired. Automatic balancing ensures optimal performance, and costs per kWh decrease with increasing capacity, making the storage unit future-proof.
What savings does the BK215 bring?
With the BK215, up to 70% self-consumption can be achieved. For an annual consumption of 4,000 kWh, the system pays for itself in 3-5 years. Annual savings range from 500 to 1,200 €, depending on PV power and consumption. By storing electricity at self-consumption prices instead of feeding it into the grid, households benefit from high long-term economic efficiency.
| Scenario | Annual Savings | Amortization |
|---|---|---|
| 2 kWp + BK215 | €600 | 3 years |
| Expanded 8.6 kWh | €1,200 | 4 years |
DRBO Greenenergy Expert Opinions
"The Sunlit Balcony Power Plant Storage BK215 is a crucial tool for the decentralized energy transition. With modular expandability, high efficiency, and plug-and-play installation, we make it easier for households to use solar energy. DRBO Greenenergy combines Sunlit technology with German support to offer safe, reliable, and cost-efficient energy solutions." – Expert at DRBO Greenenergy
Why choose DRBO Greenenergy for Sunlit storage?
DRBO Greenenergy offers the BK215 with consultation, complete packages, and special promotions. Refurbished options reduce acquisition costs, and German support ensures smooth operation. The combination of technical expertise, plug-and-play solutions, and local customer service makes DRBO Greenenergy the first choice for balcony and home solar storage.
When is buying the Sunlit BK215 worthwhile?
The BK215 is worthwhile for annual consumption over 2,000 kWh, a sunny location, and balconies with a maximum feed-in limit of 800 W. Ideal for tenants and homeowners who want to reduce their electricity costs and become independent from the grid in the long term. Funding opportunities like KfW should be checked.
Frequently Asked Questions (FAQs)
Is the BK215 weatherproof?
Yes, the storage unit is IP65 protected and temperature resistant from -20 °C to 60 °C.
Do I need an electrician?
No, plug-and-play allows for easy installation, but registration with the grid operator is required.
Does it work with dynamic tariffs?
Yes, usable with an EV3600 inverter and Shelly systems for automatic grid charging.
How long does the battery last?
The LiFePO4 cells offer over 8,000 cycles, equivalent to over 10 years of use.
Where can I buy the BK215?
Available at DRBO Greenenergy, specialist dealers, DIY stores, and selected online shops.
Some of the information in this article is sourced from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.
