GoodWe BT GW8K-BT 8 kW Three-Phase Hybrid Solar Inverter Retrofit

The GoodWe BT GW8K-BT is a three-phase 8 kW AC-coupled retrofit inverter that allows you to add high-voltage batteries (180–600 V) to existing photovoltaic installations without modifying the PV inverter or generator. With UPS-type switching <10 ms, it provides stable backup for critical loads, enhances self-consumption, and offers advanced control with professional connectivity.

Main Features

• AC on-grid power: 8 kW (8 kVA) three-phase 400/380 V, 50/60 Hz.
• Three-phase backup: 8 kVA nominal, up to 15 kVA for 60 s (depending on battery capacity).
• HV Battery: range 180–600 V; nominal voltage 500 V.
• Charge/discharge: up to 25 A continuous in both directions.
• Efficiency: up to 97.6% (European up to 97.5%).
• Power factor: adjustable ~1 (0.8 leading to 0.8 lagging); THD <3%.
• Protections: anti-islanding, RCMU, AC overcurrent/overvoltage, short circuit, battery reverse polarity, and PV insulation detection.
• Cooling: natural convection (fanless) for low noise and reduced maintenance.
• Protection rating: IP66 for protected indoor or outdoor use.
• Nighttime consumption: <15 W.

Connectivity and Monitoring

• Portal/App: Wi-Fi and LAN for monitoring, settings, and updates.
• Metering: RS-485 for three-phase smart meter (export limitation, balancing).
• Battery/BMS: CAN (default) or RS-485 for integration with compatible HV battery banks.
• Interoperability: integrates with existing PV inverters on the AC side to upgrade systems without major work.

Dimensions and Weight

• Dimensions (W × H × D): 415 × 516 × 180 mm.
• Weight: 21 kg.

Advantages for Installers and Users

• True retrofit: adds storage without replacing the current PV inverter.
• Service continuity: <10 ms switching for essential loads.
• Efficiency & savings: high performance and export control to maximize self-consumption.
• Simplified O&M: fewer moving parts, diagnostics, and remote management via the portal.

Recommended Applications

• Homes and small businesses with an existing three-phase PV inverter looking to add battery storage.
• Projects with dynamic tariffs and time-based charge/discharge strategies.
• Installations requiring three-phase backup for critical loads.

Installation and Best Practices

• Wall-mounted on a rigid, level surface with perimeter ventilation.
• Size the HV battery according to required backup power/energy.
• Complete AC protections and metering scheme (CT/RS-485 meter) for export control.
• Commission via app/portal, verify communications (Wi-Fi/LAN, RS-485, CAN), and perform backup tests.

With the GW8K-BT, you modernize your installation: add storage, increase self-consumption, and get fast, reliable backup—all with high efficiency, IP66 protection, and seamless AC-side integration.