Client Challenge
A sustainable living-focused startup in Germany aimed to develop a sleek, high-performance home energy storage solution for urban households. Key objectives included:
• Space-Saving Design: Fit seamlessly into compact apartments or garages without compromising capacity.
• Solar Integration: Optimize energy storage for homes with rooftop solar panels, reducing reliance on the grid.
• User-Friendly Operation: Intuitive interface for homeowners to monitor energy usage and manage charging schedules.
• Aesthetic Appeal: Modern design that complements interior decor, avoiding the industrial look of traditional batteries.
Our Solution
We engineered the SmartWall 5KWh, a wall-mounted lithium iron phosphate (LFP) battery system designed for residential efficiency and elegance:
Innovative Design:
• Slim Profile: Just 15cm deep, the modular unit mounts vertically on any wall, saving 50% space compared to standard floor-standing batteries.
• Premium Finish: Available in matte white or graphite gray, with a minimalist exterior that blends into home interiors.
Technical Specs:
Capacity: 5KWh per unit (expandable to 15KWh via parallel modules).
Cycle Life: 6,000+ cycles (80% DOD), ensuring 10+ years of reliable use.
Charging Speed: 2.5kW input, reaching 80% charge in 2 hours.
Smart Features:
Mobile App Integration: Real-time tracking of energy storage, solar input, and grid usage via a dedicated app.
Peak Shaving: Automatically charges during low-cost electricity hours and discharges during peak periods to reduce utility bills.
Backup Mode: Instant switch to battery power during outages, keeping essential appliances (e.g., refrigerators, heaters) running for up to 12 hours.
Results & Impact
Energy Cost Reduction: Homeowners in Germany reduced their grid electricity bills by an average of 45%, with some achieving 70% self-sufficiency during summer months.
• Space Optimization: The compact design allowed installation in 90% of urban homes surveyed, where traditional bulky batteries were previously impractical.
• User Satisfaction: 92% of users praised the app’s simplicity and the battery’s quiet operation (noise level <30dB).
• Environmental Impact: Over 200 tons of CO₂ emissions saved annually across 500+ installed units, equivalent to planting 12,000 trees.
Client Testimonial
"The SmartWall battery has redefined what’s possible for home energy storage. Its sleek design and smart features have made it a showpiece in our customers’ homes, while the performance delivers tangible savings on their energy bills. Partnering with Donnguan Tongbang allowed us to bring a premium, sustainable product to market faster than we imagined."— Anna Schmidt, Founder, GreenHome Innovations