Home energy storage battery
Project Name: Home Smart Dual-Unit Parallel Energy Storage System
Project Overview
This solution is an intelligent energy management system designed for modern homes. It adopts a parallel configuration of two 20kWh lithium iron phosphate battery units plus two 5kW bidirectional inverters, creating a safe, reliable, efficient, and flexible home energy storage solution. The system meets multiple household needs, including daily electricity consumption, emergency backup, PV self-consumption, and electricity cost optimization. It is particularly suitable for villas, residences, and home offices with high requirements for power supply reliability.
System Configuration & Technical Architecture
Core Energy Storage Units: 2 units × 20kWh UNIWEALTH LiFePO₄ battery system
Power Conversion Units: 2 units × 5kW intelligent bidirectional inverters (supporting on-grid/off-grid switching)
Intelligent Management Platform: Home Energy Management System (HEMS) + mobile APP
Installation Method: Wall-mounted or floor-standing, aesthetically compact, suitable for indoor spaces
Technical Highlights & Safety Assurance
1. Dual Safety Protection Mechanisms
Battery System Safety:
Utilizes LiFePO₄ battery cells with an 800°C thermal runaway threshold
Each unit is equipped with an independent BMS, enabling cell-level monitoring and balancing
Features fivefold protection: overcharge, overdischarge, overtemperature, overcurrent, and short circuit
System Operational Safety:
The parallel system has automatic isolation and redundant switching functions
Complies with IEC/UL 9540A energy storage system safety standards
Integrated with Arc Fault Circuit Interrupter (AFCI) and Ground Fault Circuit Interrupter (GFCI)
2. Advantages of Intelligent Parallel Operation
Power Expansion: Total output power up to 10kW, supporting simultaneous use of high-power devices such as air conditioners and EV chargers
Capacity Flexibility: 40kWh total capacity supports 1–3 days of emergency power needs for a household
Intelligent Dispatch:
Prioritizes PV generation, storing excess electricity
Automatically identifies time-of-use electricity pricing periods to achieve economically optimal charging/discharging
Supports load management, ensuring critical devices remain powered
3. Seamless Integration with PV Systems
Plug-and-Play: Compatible with mainstream PV inverters, supporting both DC and AC coupling
Maximized Self-Consumption: PV self-utilization rate can be increased to over 80%
Virtual Power Plant Ready: Future capability to participate in grid demand response and frequency regulation services
Household Application Scenarios
Daily Electricity Management
Peak-Valley Arbitrage: Charge during off-peak hours, discharge during peak hours to reduce electricity bills
PV Self-Consumption: Store daytime PV generation for nighttime use
Load Shifting: Shift operation of high-power devices to storage power supply
Emergency Power Backup
Seamless Switching: Switches to storage power within 20ms upon grid outage
Multi-Mode Operation:
Whole-House Power Mode: Supports basic household electricity needs
Critical Load Mode: Powers essential devices such as refrigerators, lighting, and network equipment
Off-Grid Operation Mode: Completely independent of the grid
EV Charging Coordination
Ordered Charging: Coordinates with home EV chargers to avoid power overload
Rate Optimization: Charges EVs during off-peak hours
V2H Ready: Supports future bidirectional interaction between EVs and home energy storage
User Experience & Intelligent Control
1. Convenient User Interface
Mobile APP: Real-time viewing of generation, consumption, and storage data
Scenario Modes: One-click switching between “Economic Mode,” “Emergency Mode,” and “Eco Mode”
Consumption Analysis: Provides detailed electricity reports and energy-saving recommendations
2. Intelligent Learning & Optimization
Habit Learning: Automatically learns household electricity usage habits to optimize charging/discharging strategies
Weather Forecast Integration: Adjusts PV generation forecasts and storage strategies based on weather predictions
Remote Control: Supports remote start/stop, mode switching, and fault diagnosis
3. Multi-System Integration
Smart Home Integration: Compatible with mainstream smart home platforms
EV Charger Coordination: Enables unified energy dispatch
Future Expansion: Supports integration with other renewable energy systems
Economic & Environmental Benefits
Economic Benefits
Electricity Savings: Reduces annual electricity costs by 30%–50%
Payback Period: Typical payback period of 4–6 years (including PV system)
Value-Added Benefits:
Increases home value and energy rating
Future participation in grid ancillary services for additional revenue
Environmental Benefits
Carbon Reduction: Reduces annual carbon emissions by 2–4 tons (depending on electricity usage structure)
Green Living: Increases household renewable energy utilization rate to over 60%
Energy Independence: Reduces reliance on the traditional grid, enhancing energy autonomy
UNIWEALTH Core Advantages & Guarantees
1. Product Reliability
Long-Life Design: Battery system cycle life ≥ 6,000 cycles (@80% DoD)
Rigorous Testing: Each system undergoes 176 safety and performance tests before leaving the factory
Multiple Certifications: CE, UL, TÜV, and other international certifications
2. Intelligent Management
Self-Developed BMS: Enables intelligent cell-level monitoring and balancing
AI Energy Management: Optimizes home energy strategies based on machine learning
OTA Upgrades: Supports remote software updates and feature expansion
3. Full Lifecycle Service
Professional Design: Free on-site survey and solution design
Standardized Installation: Installation and commissioning completed within 2–3 days
Long-Term Warranty: 10-year warranty on the battery system, lifetime technical support
O&M Support: 7×24 hour remote monitoring and fault response
Project Success Case References
UNIWEALTH has deployed similar home energy storage systems in over 20 countries worldwide, including:
Munich, Germany: Villa PV + storage system achieving 90% energy self-sufficiency
California, USA: Home energy storage backup solution for frequent power outages
Sydney, Australia: Home energy center combining PV and EV charging
Summary
The UNIWEALTH Home Smart Dual-Unit Parallel Energy Storage System represents the advanced level of modern home energy management. Through safe and reliable lithium iron phosphate battery technology, intelligent parallel architecture, and an advanced energy management system, this solution not only provides continuous power security for households but also achieves significant economic benefits through intelligent optimization, helping every home move toward a green, intelligent, and sustainable energy future.
