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AC-Coupled Energy Storage for Existing PV Systems

The AC-Coupled 5kW / 15.36kWh Energy Storage System is designed for residential and light commercial PV retrofit projects. It can be added to existing solar installations without replacing the current PV inverter, making it a practical solution for energy companies, installers, EMS platforms, and OEM/ODM partners looking to expand storage deployment in Europe.

With AC-coupled architecture, LiFePO4 battery technology, cloud-based monitoring, and scalable capacity, the system provides a flexible storage solution for self-consumption optimization, backup power, and intelligent energy management.

Technical Specifications

Empower Your Energy Independence with a Seamlessly Integrated, High-Efficiency Storage Solution Tailored for European Grid Standards.

I. Compliance & Market Advantage (Core Selling Points)

• Hungary Official Whitelist Approved: Ready for immediate grid connection in Hungary. No administrative hurdles for installers or end-users.

• Full FEAK (HMKE) Data Regulation Compliance: Specifically engineered to meet the latest Hungarian FEAK data reporting requirements, ensuring real-time, accurate communication with the national energy management systems.

• Certified for Central Europe: Fully compliant with EN 50549-1, IEC 62109-1/-2, and CEI 0-21, making it the ideal choice for distributors in Poland (Mój Prąd ready) and Hungary.

• Intelligent Monitoring: Supports RS-485, WiFi, 4G, and Ethernet for remote diagnostics and cloud-based energy management.

Specifications:

• Inverter Model: BW-INV-SPH6K

• Battery Capacity: 4.8kWh (BW-BAT-4.8S) or 9.6kWh (BW-BAT-9.6P)

• Max Efficiency: 97.3%

• Operating Temperature Range: Charge: 0°C to 50°C; Discharge: -10°C to 50°C

• Backup Power: Surge Power 11.5kW

• Communication Protocols: RS-485, WIFI, 4G, Ethernet

• Warranty: 5 Years for Inverter, 10 Years for Battery

  Benefits:

  • Reliability: The system is equipped with UPS-level redundancy and intelligent thermal management to ensure continuous operation during peak demand.

  • Cost Savings: Save on energy bills by storing excess energy and using it during high-cost peak periods.

  • Future-Proof: With dynamic load monitoring and smart meter integration, this storage system adapts to future energy pricing and usage patterns.

⚡ Introduction

Our AC Coupled ESS (3.6–6kW / 5–10kWh) is engineered for installers, distributors, and energy companies looking to expand their energy storage offerings in the Australian market. Equipped with high-voltage LFP batteries and a 10-year lifespan guarantee, the system supports VPP integration and dynamic tariff optimization, enabling partners to deliver advanced, value-added storage solutions to their customers.

🌞 Key Advantages

• Powerful Performance: 3.6–6kW inverter, 5.12–10.24kWh modular LFP battery capacity

• Ultra-Fast Switching: <10ms UPS-level backup to protect critical household loads

• Smart Control: AI scheduling with Zero Export and dynamic tariff optimization

• VPP Ready: Plug & Play, ready for Virtual Power Plant programs

• Silent Operation: <25dB, ideal for residential environments

• Robust Protection: IP65 waterproof and dustproof, suitable for outdoor installation

• Certified Safety: Complies with AS/NZS 4777.2:2020, UN38.3, and IEC62619 standards

Technical Specifications (summary)

AC Side (Grid-Tie)

• Topology: 3-phase (3/N/PE)

• Rated / max apparent power: 10 kW / 20.5 kVA

• Max AC output: 11 kVA; Rated/Max output current: 15.2/16.7 A

• Grid voltages: 220/380, 230/400, 240/415 Vac; AC range: 270–480 Vac

• Frequency: 50/60 Hz (45–55 / 55–65 Hz)

• Power factor: adjustable 0.8 lead … 0.8 lag, PF >0.99

• THD: <3%

PV Input (Hybrid)

• MPPT: 2 trackers (multi-string)

• Max PV power: 15 kW

• Max open-circuit voltage (Voc): 600 Vdc

• Start/min operating voltage: 180 Vdc

• Max PV current: up to 48 A total (e.g., 16 A + 32 A)

Battery System (High-Voltage LFP)

• Chemistry: LiFePO₄; Stack options: S1 (9.6 kWh) / S2 (19.2 kWh)

• Configuration (example): 60S1P ×1 / ×2, nominal 192/384 Vdc

• Cell capacity: 50 Ah; Max charge/discharge current: 30 A

• Charge cut-off: 216/432 Vdc; Discharge cut-off: 162/324 Vdc

• Cycle life: ≥6000 cycles @ 25±2 °C, 0.5C/0.5C, SOE 70% EOL

Environment & Safety

• Operating temp: charge 0–55 °C, discharge –20–55 °C

• Storage: –20–50 °C (RH 60±25%)

• Ingress protection: IP65

• Protections: over/under-voltage, over-current/overload, short-circuit, over-temperature, anti-islanding, insulation & residual-current monitoring, Type II DC/AC surge

Communications

• RS485 / Modbus RTU (EMS integration; full register map supplied)

• RS232; Wi-Fi monitoring (optional, can be disabled per policy)

Dimensions & Weight (reference)

• Inverter HV section: 800 × 210 × 775 mm (~65 kg)

• Battery module (each): 800 × 188 × 512 mm (~95 kg)

• Packaging (with accessories): inverter 1115 × 300 × 880 mm; battery 920 × 310 × 735 mm (single / ×2)
  (Exact values per configuration; ask for the packing list for your PO.)

Compliance & Documents

• CE (EMC/LVD), RoHS, UN38.3, MSDS

• Grid standards (e.g., EN 50549-1, G99) available by market; certificate pack provided before shipment.

Technical Specifications

• Usable Capacity: 10kWh / 15kWh / 20kWh / 25kWh
  • Cell Type: Lithium Iron Phosphate (LiFePO4)
  • Cycle Life: ≥6000 cycles (80% DOD)
  • Rated Voltage: High Voltage stackable system
  • Protection Level: IP65
  • Operating Temperature:
  - Charge: 0 ~ +50°C
  - Discharge: –20 ~ +50°C
  • Certifications: UN38.3, MSDS, CE-EMC, IEC62619, IEC63056