Residential Energy Storage Installation Case Study: Yunfan Battery Powers a Family Home in Milan, Italy

Project Location: Detached family home, suburban Milan, Italy

Installation Date: March 2026

Customer Profile: A family of four with an existing 6kW rooftop solar PV system. Their daily electricity consumption averages 12–15 kWh, with 45% of usage occurring during evening peak hours (18:00–22:00). Before adding storage, only 32% of their solar energy was self-consumed—most excess power was exported to the grid at just €0.08/kWh, while they paid €0.48/kWh for peak-time electricity. The home also experienced 3–5 grid outages annually, lasting up to 4 hours, which disrupted daily life and remote work.

Working with the homeowner, we designed a simple, reliable system centered on the Yunfan residential LiFePO4 energy storage battery, tailored to their usage habits and garage installation needs:

The project was completed in 4 days with minimal disruption:

1. Pre-Installation Survey (1 day): Engineers assessed the garage space, confirmed compatibility between the Yunfan battery and the existing inverter, and reviewed local safety codes for indoor storage installation.
2. Installation (2 days): The Yunfan battery was secured in the garage with its wheeled base for flexible movement. All electrical connections used M6 cold-pressed terminals (contact resistance <0.5mΩ) to prevent overheating.
3. Commissioning (1 day): The system was programmed with optimized charge-discharge settings: solar charging during the day, battery discharge during peak hours. The battery’s built-in LED screen was calibrated to display real-time state of charge (SOC) and system status.

After 92 days of stable operation, the system delivered measurable improvements aligned with Italian home storage trends:

• Solar Self-Consumption Rate: Increased from 32% to 83%, nearly eliminating grid exports of excess solar power.
• Monthly Electricity Bills: Dropped from €187 to €42, with an annual savings of approximately €1,740.
• Outage Performance: During a 3-hour grid outage in April, the Yunfan battery powered critical loads (refrigerator, lighting, internet, and laptop) without interruption.
• Battery Health: The Yunfan battery’s state of health (SOH) remained at 100%, with an average daily depth of discharge of 65%, well within its design parameters.

“The best part? We no longer stress about high evening electricity prices or power outages. The Yunfan battery is quiet, the LED screen makes energy use easy to track, and it fits neatly in our garage without taking up too much space,” the homeowner shared.

With the current savings rate, the payback period is just 2.6 years—far faster than the Italian residential storage average of 5–7 years. The Yunfan battery’s ≥4,000 cycle life ensures reliable performance for over 10 years, making it a low-risk, high-return investment.

Yunfan works with certified installers across Europe to deliver tailored home storage solutions. If you’re a distributor looking to offer reliable, high-performance batteries for residential projects, we welcome you to get in touch.