For existing communication base stations (especially tower equipment rooms/outdoor cabinet sites), achieve zero-investment upgrades to backup power capacity and energy savings through “photovoltaic + energy storage” solutions.

1. Addressing pain points
   • Lead-acid batteries offer limited backup time (only 2–3 hours)
   • High battery replacement costs (approx. ¥4,000 per site annually)
   • Lack of environmental monitoring leads to shortened battery life due to air conditioning failures
   • Inadequate for planned outages (>3 hours)

2. Solutions Classification

（1）DC Energy Storage Solutions

• Features:Direct connection to the 48V busbar, no modification to the original power supply system required.
• Advantages:

• Simple retrofitting, low cost
• Pure DC-DC conversion, high efficiency (>96%)
• Reserved PV interface for future expansion
• Supports peak shaving and valley filling (charging during off-peak hours, discharging during peak/spike hours)

（2）AC Energy Storage Solutions

• Core Equipment: Power Conversion System (PCS)

• Model: EPCS15 / EPCS30 (15kW / 30kW)
• Supports wide voltage input range of 150–750V, compatible with 280Ah large-capacity battery cells
• Built-in lightweight Energy Management System (EMS) supporting microgrid, self-generation and self-consumption modes, and more
  • Applicable scenarios:Sites requiring simultaneous coverage of AC loads (e.g., air conditioning)
  • Advantages:Greater energy storage capacity, higher peak-to-off-peak arbitrage profits

3. Battery Selection (Existing Stations)

• Semi-solid lithium battery (280Ah)

• Energy density ≥165Wh/kg
• Cycle life up to 26,000 cycles (0.5C, 100% DOD)
• High safety (solid-liquid hybrid electrolyte, low fire/explosion risk)
  • Standard Lithium Battery (100Ah/200Ah)
• Modular design, scalable up to 50kWh in parallel

4. Business Model Highlights
   • Zero Investment for Operators: Battery investment, operation & maintenance, and disposal costs are covered by the partner
   • Electricity Cost Sharing: Enjoy approximately 3% discount on electricity rates
   • Extended Backup Power Duration: Increased from 2–3 hours to up to 7 hours
   • Data Access: Free provision of environmental and electricity consumption data interfaces

Safety Assurance System (Energy Storage Products)

• Multi-level battery cell safety monitoring
• High-efficiency thermal insulation + pressure relief valve + compartmentalized design
• Intelligent fire suppression (perfluorohexane targeted extinguishing)
• Liquid cooling thermal management (precise temperature differential control)
• End-to-end fire detection monitoring

Typical Application Scenario Solutions

Scenario 1: Grid Power + Backup Power Storage

• Components: Mains power + Battery + FSU monitoring
• Function: Supplies power during mains operation; provides short-term backup power during mains outages
• Applications: Urban base stations, areas with stable power grids

Scenario 2: Grid Power + Energy Storage + Diesel Generator

• Components: Mains power + Battery + Diesel generator + FSU
• Logic: Mains power → Battery → Diesel generator (three-tier protection)
• Application: Remote areas with mains power but occasional outages

Scenario 3: PV + Grid Power + Energy Storage + Diesel Generator (Full Hybrid)

• Energy Priority: PV > Grid Power > Battery > Diesel Generator
• Components: Rectifier Power Supply + PV Power Cabinet + Battery + Diesel Generator + FSU
• Suitable For: Areas without stable grid power and with ample sunlight (e.g., plateaus, islands)

Scenario 4: Photovoltaic + Energy Storage + Diesel Generator (Off-Grid Type)

• No grid connection; fully reliant on renewable energy + diesel generator backup
• Priority: Solar > Battery > Diesel generator (DC)
• Applicable for: Fully off-grid communication sites