Solar Energy Storage System

Engineering Specification & OEM/ODM Manufacturing Guide

Our modular energy storage systems store excess photovoltaic (PV) generation for load-shifting, peak shaving, and emergency backup. Built with Lithium Iron Phosphate (LiFePO4) chemistry and an intelligent Battery Management System (BMS), the architecture delivers high thermal stability, a usable Depth of Discharge (DoD) of 95%, and a designed service life exceeding 6,000 cycles at 80% DoD.

Cell Chemistry & Performance Metrics
Cell Selection: Grade A prismatic LiFePO4 cells. Strict pre-shipment factory sorting ensures cell voltage differences are kept within +/-5 mV and internal resistance within +/-1 mOhm, preventing localized hot spots and premature capacity fade.

Thermal Stability: LiFePO4 features a strong covalent P-O bond structure, making the crystal lattice resilient against thermal runaway up to 270 deg C, outperforming standard ternary lithium (NMC) chemistries.

Round-Trip Efficiency: Achieves >= 95% efficiency, minimizing thermal energy loss during charge and discharge cycles.

Intelligent BMS Architecture
The embedded master-slave BMS continuously samples real-time telemetry across every series-connected block:

Cell Voltage Balancing: Active/passive balancing currents up to 200 mA prevent cell drift.

Telemetry Parameters: Real-time logging of individual cell voltages, pack current, PCB and cell temperatures, state of charge (SOC), and state of health (SOH).

Hardware Protections: Hard-wired secondary trip circuits for short-circuit, over-voltage, under-voltage, over-current, and over-temperature conditions.

Mechanical & Environmental Specifications
Scalability: Modular design supports up to 16 units in parallel without external combiners, allowing capacity to scale from 5kWh to 80kWh+.

Inverter Compatibility: Standardized communication stacks support CAN 2.0 and RS485, ensuring plug-and-play handshakes with leading inverter brands (e.g., Growatt, GoodWe, Victron, Deye, SMA).

Enclosure Design: Cold-rolled steel housing with anti-corrosion powder coating. Available in IP20 (indoor rack/wall) and IP54/IP65 (outdoor cabinet) configurations.

Operating Range: Charge temperature 0 deg C to 55 deg C; Discharge temperature -20 deg C to 60 deg C.

International Certifications & Compliance
Global Market Standards: Fully certified to meet rigorous international safety, transport, and grid-connection requirements, including UL1973, IEC62619, CE, UN38.3, and RoHS, ensuring seamless customs clearance and hassle-free project bidding worldwide.

We provide white-label manufacturing services for global distributors, renewable energy brands, and regional EPC contractors.

Electrical Customization: Voltage platforms ranging from 12V to 800V DC, custom communication protocols for proprietary inverters, and adjustable charge/discharge current limits.

Industrial Design: Custom sheet metal enclosure dimensions, front-panel branding, color-matching via RAL color codes, and laser-etched nameplates.

Software Integration: Custom firmware boot screens, localized LCD interface languages, and private-cloud IoT server integration for remote fleet monitoring.

Every manufactured batch undergoes a mandatory 100% factory acceptance test (FAT) checklist:

Incoming Inspection: Internal resistance and open-circuit voltage (OCV) screening of raw cells.

Capacity Matching: Automated sorting of cells into matched groups prior to module assembly.

BMS Calibration: Sensor accuracy verification for voltage (+/-10 mV) and current (+/-1 A).

Aging & Cycling Test: Full charge-discharge cycle testing under simulated load profiles.

Safety Verification: Insulation resistance testing (>= 20 MOhm at 1000V DC) and dielectric strength testing.

Comprehensive Warranty: Backed by an industry-leading 10-year or 6,000-cycle performance warranty, giving global buyers and end-users complete long-term operational confidence.