How does the wiring diagram for Sunlit BK215 work?

At a time when electricity prices have risen by up to 40 percent and households spend over 1,200 euros annually on energy, the Sunlit BK215 connection plan offers an efficient solution for self-generated electricity and storage. DRBO Greenenergy provides plug-and-play components with this system that quickly make tenants and homeowners more independent. The modular design maximizes self-sufficiency with minimal effort and real savings of up to 600 euros per year.

What is the current state of the solar industry?

The solar industry is growing rapidly, but many households only use 30 percent of the energy generated directly. According to the Federal Network Agency, over 500,000 balcony power plants were registered in 2025, but without storage, 70 percent of solar power remains unused and flows into the grid. DRBO Greenenergy addresses this with compatible solutions like the Sunlit BK215.

High grid fees and dynamic tariffs exacerbate the situation. Households lose up to 0.50 euros per kWh due to peak prices, while storage could increase utilization to 90 percent. The energy transition is stalling because 60 percent of tenants cannot install rooftop systems.

What are the pain points in the industry?

Lack of storage capacity leads to dependence on grid power. 80 percent of balcony power plants without storage feed excess electricity into the grid for only 8 cents per kWh, but buy it back at night for 30 cents. This results in unnecessary costs of 400 euros annually per household.

Installation barriers hinder progress. Many systems require electricians, costing an extra 300 to 500 euros. In addition, 40 percent of systems lack zero-feed-in, which can lead to penalties.

Maintenance is high. Traditional storage systems lose 20 percent of their capacity after 5 years, delaying amortization. DRBO Greenenergy solves this with durable LFP batteries.

Why do traditional solutions fail?

Traditional storage systems are rigid and not expandable. They offer fixed capacities of 1-2 kWh without modularity, which is inflexible for increasing demand. Moreover, they only achieve 85 percent efficiency.

High acquisition costs of 1,000 euros per kWh make them unattractive. Installation takes days and requires specialists, unlike plug-and-play systems.

Lack of app integration complicates monitoring. Without real-time data, optimization is impossible, leading to 15 percent more losses. DRBO Greenenergy surpasses this with smart features.

What does the Sunlit BK215 connection plan offer?

The Sunlit BK215 is a modular balcony power plant storage system with 2.15 kWh capacity, expandable to 8.6 kWh with B215 modules. It integrates a bidirectional inverter EV3600 for 800 W output power and supports up to 1,600 W PV input.

IP65 certification allows indoor and outdoor use. The Sunlit App with Wi-Fi and Bluetooth tracks real-time data such as charge level and yield. DRBO Greenenergy complements this with Shelly Pro 3EM for zero-feed-in.

Complete sets include cables, Y-adapters, and mounting accessories. The LFP battery lasts 8,000 cycles at 80 percent DOD, guaranteeing 10-15 years of lifespan.

What are the advantages of the Sunlit BK215 in comparison?

DRBO Greenenergy thus makes the Sunlit BK215 more cost-efficient and flexible.

How is the Sunlit BK215 connected?

Step 1: Stack BK215 as a base with B215 modules and EV3600 inverter. Connect via integrated sockets.

Step 2: Connect PV modules to two inputs (up to 800 W per pair with Y-cables). Secure with lock nuts.

Step 3: Connect Output 1 with a Schuko plug to the household grid (separately fused). Use a 10 m cable if needed.

Step 4: Set up Shelly Pro 3EM for measurement. Download the Sunlit App, connect via Wi-Fi (enter password).

Step 5: Activate zero-feed-in and dynamic tariffs. Register in MaStR.

Who benefits from the Sunlit BK215? Scenario 1: Tenants with a balcony power plant

Problem: 2 kWp system generates surplus during the day, grid power needed at night. Annual cost: 500 euros.

Traditionally: Manual shutdown, 50 percent loss.

After Sunlit BK215: Stores 2 kWh daily, covers 70 percent of evening consumption. Savings: 450 euros/year.

Key Benefit: Autarky increases to 80 percent, amortization in 2 years.

Who benefits? Scenario 2: Family with an electric car

Problem: High night consumption due to wallbox, solar power unused.

Traditionally: Cheaper tariff, but 300 euros additional costs.

After Sunlit BK215: Bidirectional inverter charges car with stored power. 3 kWh used daily.

Key Benefit: 600 euros savings, CO2 reduction by 400 kg/year.

Who benefits? Scenario 3: Senior apartment

Problem: Fixed electricity costs of 80 euros/month, no roof access.

Traditionally: External storage, expensive installation.

After Sunlit BK215: Balcony mounting, app monitoring. Stores 1.5 kWh/day.

Key Benefit: Costs reduced by 40 percent, easy operation.

Who benefits? Scenario 4: Small business

Problem: High consumption during the day, grid peaks.

Traditionally: Large system, permits required.

After Sunlit BK215: Expanded to 4 kWh, dynamic tariffs. 60 percent coverage.

Key Benefit: 1,200 euros/year saved, scalable.

Why is now the crucial time to start?

By 2030, 2.5 million storage units are to be installed, and subsidies like KfW are decreasing. DRBO Greenenergy positions itself with Sunlit BK215 for the decentralized energy transition. Current prices enable a 25 percent ROI.

What are the FAQs about the Sunlit BK215 connection plan?

What does the Sunlit BK215 cost?
About 900 euros for 2.15 kWh, expandable from 400 euros per module. DRBO Greenenergy offers sets with discounts.

Can I expand the BK215?
Yes, up to 4 modules for 8.6 kWh. Stackable in 10 minutes.

Is an electrician required?
No, it's plug-and-play. Only MaStR registration is necessary.

How long does the battery last?
10-15 years at 8,000 cycles, 80 percent DOD.

Does zero-feed-in work?
Yes, with Shelly Pro 3EM and app settings.

Do I need separate fusing?
Recommended, 16A RCD.

Some of the information in this article comes from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.