What is the Sunlit B215 price in 2026 – expansion from €699?

The Sunlit B215 starts at €699 as a modular 2.15 kWh expansion battery for the SunEnergyXT BK215 PLUS system. Expandable up to 17.2 kWh and compatible with Deye inverters and app control. Available at DRBO Greenenergy with refurbished options, 0% financing, Trustpilot 4.6/5, and German support – the ideal solution for tenant expansions and homeowners.

Check: balcony power plant

What is the Sunlit B215 and what is its function in a balcony power plant system?

The Sunlit B215 is a modular expansion battery with a 2.15 kWh capacity, specifically designed to complement existing BK215 PLUS balcony power plant systems. Unlike the BK215 PLUS head unit, the B215 does not contain an integrated inverter – it functions purely as a battery expansion. The cell chemistry is based on LiFePO4 with EVE Premium cells and offers a lifespan of over 10,000 cycles, equivalent to approximately 30 years of use. With this technology, the B215 enables continuous power storage for self-consumption optimization.

What is the current Sunlit B215 price at DRBO Greenenergy?

The Sunlit B215 expansion battery costs €699 as a single module. DRBO Greenenergy offers attractive complete packages: The Starter DUO Set with BK215 PLUS and B215 PLUS starts at €1,398, the Speicher Trio (Storage Trio) with 6.45 kWh total capacity costs €2,147. Refurbished variants allow for additional savings. All systems benefit from 0% VAT for private individuals and 0% financing through OpenBank.

Variant	Capacity	Price	Feature
B215 PLUS (Single)	2.15 kWh	€699	Pure expansion, without inverter
Starter DUO (BK215 + B215)	4.3 kWh	€1,398+	Complete starter set with inverter
Speicher Trio	6.45 kWh	€2,147	BK215 + 2× B215 PLUS with maximum expansion

What is the difference between the Sunlit B215 and the BK215 PLUS?

The BK215 PLUS is a head unit with an integrated inverter (up to 2 kW discharge power) and forms the basis of a balcony power plant system. The B215, on the other hand, is a pure expansion battery without an inverter. While the BK215 PLUS functions independently, the B215 serves as a modular add-on. The BK215 PLUS costs more (price varies) but offers immediate feed-in functionality. The B215 costs €699 and maximizes the storage capacity of an existing system – ideal for subsequent expansions without technical complexity.

Is the Sunlit B215 fully compatible with BK215 systems and Deye inverters?

Yes, the B215 PLUS offers full Plug & Play compatibility with the SunEnergyXT BK215 PLUS system and all compatible inverters such as the Deye SUN-M80G4-EU-Q0 or the APsystems EZ1-M. The batteries can be expanded in parallel with up to eight modules, allowing a total capacity of 17.2 kWh. Management is done centrally via the SunEnergyXT app with Home Assistant integration and local API. No electrical adjustments or specialized knowledge are required.

Which expansion options does the Sunlit B215 offer for larger capacities?

The B215 PLUS allows for gradual capacity expansion up to 17.2 kWh by combining it with up to 7 additional B215 modules. Each module stores 2.15 kWh (4.3 kWh usable in total with multiple units). The discharge power increases with each module: One module provides up to 2 kW, with expansions up to 2.4 kW. DRBO Greenenergy offers predefined configurations such as the Speicher Trio (6.45 kWh) or custom combinations – all without additional costs for electricians or conversion work.

How does the Plug & Play installation of the Sunlit B215 work with DRBO Greenenergy?

Installing the B215 requires only three steps: First, the device is placed next to the BK215 PLUS, then a wired connection is made using the included interface cable. Finally, the system is configured via the SunEnergyXT app. The system is TÜV-certified and does not require a specialist company – especially important for tenants or balcony power plant owners without technical experience. DRBO Greenenergy offers free consultation at drbogreeninergy.com/pages/kostenlose-beratung-fur-solarlosungen-drbo-greenenergy.

Can the Sunlit B215 be optimized for dynamic electricity tariffs like Tibber or aWATTar?

Yes, the B215 PLUS is fully compatible with intelligent charging systems for dynamic electricity tariffs. The SunEnergyXT app enables a response time of approximately 1 second and integrates with Home Assistant and local API systems. This allows for automatic adjustment of charging behavior to favorable tariff phases – a core function of DRBO Greenenergy's Dynamic Starter PLUS Set, designed for Tibber and aWATTar customers. This way, users maximize their cost advantage through intelligent storage management.

Is the Sunlit B215 suitable for winter and weather-resistant?

The B215 PLUS meets protection class IP65, which means complete dust and water protection – making it suitable for outdoor use on balconies or in damp environments. The operating temperature ranges from -20 °C to +55 °C, with integrated automatic battery heating below 0 °C for reliable winter operation. The aerosol fire suppression system also ensures safety. STERN.de recommended the similarly equipped BK215 PLUS system specifically for winter-proof outdoor use – a standard that the B215 fully meets as an expansion.

DRBO Greenenergy Expert Views: "The Sunlit B215 is one of our most successful expansion products in the tenant segment," explains the DRBO Greenenergy consulting team. "Many customers start with a BK215 PLUS Basic Set but then want to increase their storage capacity without buying a completely new system. The B215 solves exactly this problem: Plug in, configure with the app, done. With 0% financing through OpenBank, costs are also eliminated – for example, customers pay for the Starter DUO Set from €1,398 over 24 or 36 months, interest-free." The company also offers a 30-year performance guarantee on all B215 modules, which underscores long-term profitability.

What warranties apply to the refurbished Sunlit B215?

Refurbished B215 modules from DRBO Greenenergy receive the full manufacturer's warranty: 30 years on linear output power, 12 years on workmanship and materials, and 10 years on IP67 protection class. Refurbished here means: The device has been tested, cleaned, and repaired if necessary – but functions identically to new goods. This makes the refurbished B215 an economical alternative, especially for expansions. DRBO Greenenergy guarantees the highest quality standards through Trustpilot 4.6/5 customer reviews.

Why is the Sunlit B215 a cheaper alternative to complete new purchases?

Instead of buying a completely new balcony power plant, owners can simply expand their existing system with B215 modules – at a fraction of the cost. A single B215 costs €699, while a new 900 Wp complete system costs €269 but does not include storage. With the Starter DUO Set from €1,398, customers already receive 4.3 kWh of storage plus an inverter. The savings compared to separate new purchases are typically 15–20%. In addition, DRBO Greenenergy offers 0% VAT and 0% financing options, which significantly simplifies overall budgeting.

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Scenario	Cost without B215	Cost with B215 expansion	Savings
Double capacity (2.15 → 4.3 kWh)	€1,600–1,800 (new purchase)	€699 (1× B215)	€900–1,100
Expand to 6.45 kWh	€2,400–2,600	€1,398 (Speicher Trio)	€1,000–1,200

Where can I buy the Sunlit B215 and what payment options does DRBO Greenenergy offer?

The Sunlit B215 is exclusively available through DRBO Greenenergy – drbogreeninergy.com. The company offers several payment options: 0% financing through OpenBank (24–36 months), immediate payment by credit card, bank transfer, or PayPal. Delivery is made by freight forwarder to the curb within 3–5 working days. For questions about suitability or configuration, the nationwide support team is available at +49 610 9375728 or by email. DRBO Greenenergy also cooperates with installation companies if professional installation is desired.

Is a free consultation for the Sunlit B215 available at DRBO Greenenergy?

Yes, DRBO Greenenergy offers free solar consultation specifically for the Sunlit B215 and the entire BK215 ecosystem. Interested parties can register online at drbogreeninergy.com/pages/kostenlose-beratung-fur-solarlosungen-drbo-greenenergy or contact the German support team directly. The consultants help with sizing (How many modules do I need?), compatibility testing with existing systems, and financial planning. This is particularly valuable for tenants who want to know if a B215 fits into their balcony power plant planning.

Can the Sunlit B215 also be operated bidirectionally with the SunEnergyXT EV3600?

Yes, the B215 PLUS is fully compatible with the SunEnergyXT EV3600 bidirectional inverter (€799). The EV3600 not only allows for discharging the battery (as with the standard BK215) but also controlled charging from inexpensive power sources – ideal for Vehicle-to-Home or intelligent grid integration. With the B215 as an expansion, users can gradually build up their bidirectional capacity from 2.15 kWh to up to 17.2 kWh without changing the inverter. The 2Way Speicherturm PLUS Set (2Way Storage Tower PLUS Set) from DRBO Greenenergy combines exactly these technologies for maximum flexibility.

What makes the Sunlit B215 the ideal solution for tenants?

Tenants typically cannot interfere with the power grid or use roof areas – the B215 offers maximum flexibility here. The system is completely mobile: it can be installed on the balcony, terrace, or even in the living room, without requiring construction work. DRBO Greenenergy specifically offers a Tenant Starter Set (RRP €1,548, currently cheaper) designed precisely for this target group. If they move, tenants can simply take the system with them. With the SunEnergyXT app, they have full control over their self-consumption – an important step towards independence from expensive electricity providers.

What technical interfaces and communication protocols does the Sunlit B215 use?

The B215 PLUS communicates via the SunEnergyXT app (iOS & Android) with a response time of approximately 1 second. In addition, the system is Home Assistant-compatible and offers a local REST API for integrations with other smart home systems. This allows, for example, coupling with washing machine automation (wash when storage is full) or heat pump control. The WLAN integration is secure and local – data does not leave the home network, which ensures data protection.

How can you benefit from 0% VAT on the Sunlit B215?

DRBO Greenenergy offers 0% VAT on solar products for private individuals in Germany – this also applies to the Sunlit B215. This is a support measure to promote the energy transition and reduces the total cost by approximately 19% compared to regular prices. A B215 at €699 net would therefore cost without VAT, while an identical device elsewhere would cost about €830 gross. This saving adds up particularly with larger sets: The Starter DUO Set quickly saves €250–300 here. DRBO Greenenergy fully transparently calculates this in the product calculation.

Is there an optimal sizing model for the Sunlit B215?

The ideal size depends on daily energy consumption and balcony power plant yield. A 900 Wp balcony power plant (like the DRBO 900 Wp system) generates about 4–5 kWh on sunny days – for a 3-person household with consumption of 2–3 kWh/day, a single B215 (2.15 kWh) is a solid basis for morning/evening buffering. Larger households (4+ people, electric car, heat pump) benefit from Speicher Trio or even 8.6 kWh configurations. DRBO Greenenergy helps with sizing through free consultation – based on the current electricity bill profile and available balcony space.

Conclusion

The Sunlit B215 is a cost-effective and flexible solution for expanding existing balcony power plant systems. With an introductory price of €699, a full 30-year warranty, IP65 weather protection, and 0% VAT, it offers tenants and homeowners the opportunity to gradually build their energy independence. DRBO Greenenergy makes purchasing particularly attractive through 0% financing, nationwide support, and free consultation. Anyone who wants to expand their BK215 system without buying a complete new balcony power plant will find the perfect solution in the B215 PLUS – especially in combination with predefined sets like the Starter DUO (€1,398+) or the Speicher Trio (€2,147). The decentralized energy transition begins with small, modular steps – the B215 makes these steps affordable.

Frequently Asked Questions

Does a Sunlit B215 expansion set really only cost €699?
Yes, the single B215 PLUS battery costs €699. Complete packages like the Starter DUO (BK215 + B215 PLUS) start from €1,398. All prices are exclusive of VAT (0% VAT for private individuals) and can be combined with 0% financing options.

Is the Sunlit B215 reliable in winter?
Yes, the B215 PLUS with IP65 protection and an operating range of -20 °C to +55 °C is suitable for winter. The integrated automatic battery heating below 0 °C guarantees unrestricted function. STERN.de has already recommended similar systems for winter-proof outdoor use.

Can I easily add a B215 to my existing BK215 PLUS?
Yes, completely. The B215 is Plug & Play compatible with the BK215 PLUS – simply connect and configure via the SunEnergyXT app. No electricians or conversion work required.

What total capacity is possible with multiple B215 modules?
With up to 8 B215 modules, a total capacity of 17.2 kWh can be achieved. DRBO Greenenergy offers predefined configurations and customized assemblies.

Does DRBO Greenenergy really offer free consultation for the B215?
Yes, at drbogreeninergy.com/pages/kostenlose-beratung-fur-solarlosungen-drbo-greenenergy or by phone at +49 610 9375728. The German support team helps with sizing, compatibility, and financial planning.