Reliable Backup Supply for Energy Storage GoodWe STS200-80-10

The GoodWe STS200-80-10 is a static transfer system designed to provide a reliable backup power supply in energy storage installations. It works together with compatible GoodWe hybrid inverters to manage the transition between grid-connected operation and backup mode when a power outage occurs.

With a rated apparent power of 50 kilovolt-amperes, three-phase 380 or 400 volt voltage, and a switching time of less than 10 milliseconds, the STS helps keep backup loads powered by the energy available from solar panels and batteries. It also supports generator integration and is ready to handle high-power loads such as heat pumps and motors.

Static transfer system for energy storage

The STS, or static transfer system, acts as the switching element between the electrical grid, the hybrid inverter, the backup loads and, when part of the installation, a generator.

When the grid is operating normally, the system allows operation in grid-connected mode. If a power outage occurs, the inverter switches to backup mode and maintains supply to critical loads using the energy available in the photovoltaic system or batteries.

When grid power returns, the system allows the inverter to resynchronize and resume grid-connected operation.

Switching time under 10 milliseconds

One of the main features of the GoodWe STS200-80-10 is its switching time of less than 10 milliseconds. This fast transfer is designed to minimize interruption between grid-connected operation and backup mode.

This feature is especially important in commercial installations and other applications where continuity of supply to essential loads is required.

Compatible with GoodWe ET40/50 hybrid inverters

GoodWe's current EMEA documentation specifies compatibility of the STS200-80-10 with GoodWe ET40/50 hybrid inverters.

Communication between the STS and the inverter is carried out via RS485, allowing connection, disconnection and transition operations between the different operating modes to be coordinated.

Rated power of 50 kilovolt-amperes

The connection to the inverter is designed for a rated apparent power of 50 kilovolt-amperes. Under normal grid-connected conditions, the grid side also has a rated apparent power of 50 kilovolt-amperes.

At a nominal voltage of 400 volts, the rated current is 72.5 amperes. When the nominal output voltage is 380 volts, the rated current indicated by GoodWe is 75.8 amperes.

Up to 55 kilovolt-amperes in off-grid backup mode

At the output intended for backup loads, the STS provides a rated apparent power of 50 kilovolt-amperes.

When the installation operates off-grid, the maximum backup apparent power can reach 55 kilovolt-amperes, providing additional capacity to support certain load conditions.

Up to 138 kilovolt-amperes with grid available

When grid supply is available, the backup interface supports a maximum apparent power of up to 138 kilovolt-amperes.

GoodWe also specifies a maximum input power at the grid port of 138 kilowatts for energy purchased from the grid. The maximum consumption current on the grid and backup side can reach 200 amperes within the conditions specified by the manufacturer.

Ready for large loads

The GoodWe STS200-80-10 is designed to manage high-power loads within the electrical limits established for the equipment.

GoodWe explicitly highlights its use with loads such as heat pumps and high-power motors, expanding the possible uses of the storage system in commercial installations and applications with demanding consumption.

Generator integration

In addition to working with the electrical grid and the hybrid inverter, the STS has an interface ready for the integration of a generator or a compatible photovoltaic inverter.

This option makes it possible to design energy systems with an additional generation source to increase the flexibility and energy availability of the installation.

Up to 55 kilovolt-amperes at the generator input

The connection intended for the generator or photovoltaic inverter has a rated apparent power of 50 kilovolt-amperes and a maximum apparent power of 55 kilovolt-amperes.

The rated current is 72.5 amperes at 400 volts. GoodWe specifies a generator-side relay rated current of 90 amperes.

Three-phase 380 or 400 volt voltage

The STS200-80-10 is designed for three-phase systems with a nominal output voltage of 380 or 400 volts and 3L/N/PE configuration.

The nominal frequency can be 50 or 60 hertz, with an accepted frequency range between 45 and 65 hertz.

The technical documentation also establishes an output voltage range of 176 to 276 volts according to the conditions indicated by GoodWe.

200 amp grid relay

The system incorporates an AC relay with a rated current of 200 amperes. This capacity makes it possible to manage the high currents that can occur at the grid and backup interface when the installation operates connected to the electrical supply.

On the generator side, the relay has a rated current of 90 amperes.

IP65 protection for demanding installations

The GoodWe STS200-80-10 has an IP65 protection rating, providing protection against dust and water ingress within the conditions established for this classification.

Its construction allows it to be used in different installation environments as long as the location, mounting, ventilation and protection requirements indicated by GoodWe are respected.

Wide operating temperature range

The STS can operate at ambient temperatures between -35 and 60 degrees Celsius, allowing use across a wide range of environmental conditions.

The maximum operating altitude specified by GoodWe is 4,000 meters.

Natural convection cooling

The system uses natural convection cooling, so it does not rely on fans for normal cooling.

This configuration reduces the number of moving mechanical parts and allows passive operation of the cooling system.

Wall mounting

The GoodWe STS200-80-10 is designed for wall installation. It has dimensions of 510 millimeters in width, 425 millimeters in height and 156 millimeters in depth.

Its weight is approximately 16.5 kilograms, so the mounting surface and fixing elements used during installation must be suitable to support the equipment safely.

Compact design for commercial storage systems

Despite handling grid currents of up to 200 amperes and high backup power levels, the STS has a compact format that makes it easy to integrate alongside the inverter and the rest of the energy storage installation components.

Installation must be carried out in accordance with the clearances, orientations and installation requirements defined in the manufacturer's manual.

RS485 communication with the inverter

Communication between the static transfer system and the compatible GoodWe inverter is carried out via RS485.

This communication makes it possible to coordinate inverter operation with grid status, backup output and the other energy sources connected to the system.

Applications of the GoodWe STS200-80-10

The STS is especially suited to commercial energy storage systems and other three-phase installations where backup power is required.

Possible applications include:

• Energy storage systems with GoodWe ET40/50 hybrid inverters.
• Photovoltaic installations with battery storage and backup function.
• Commercial buildings with critical loads.
• Installations with heat pumps.
• Systems with high-power motors.
• Installations with an auxiliary generator.
• Systems requiring a fast transition between grid and backup.

Technical features of the GoodWe STS200-80-10

• Brand: GoodWe.
• Series: STS.
• Reference: STS200-80-10.
• Product type: static transfer system.
• Application: backup power supply for energy storage systems.
• Compatibility indicated by GoodWe: ET40/50 hybrid inverters.
• Nominal output voltage: 380 or 400 volts.
• Electrical configuration: 3L/N/PE.
• Output voltage range: between 176 and 276 volts.
• Nominal frequency: 50 or 60 hertz.
• Frequency range: between 45 and 65 hertz.
• Rated apparent power on the inverter side: 50 kilovolt-amperes.
• Rated apparent power on the grid side: 50 kilovolt-amperes.
• Rated backup apparent power: 50 kilovolt-amperes.
• Maximum apparent power off-grid: 55 kilovolt-amperes.
• Maximum apparent power with grid: 138 kilovolt-amperes.
• Rated apparent power of the generator or photovoltaic inverter port: 50 kilovolt-amperes.
• Maximum apparent power of the generator or photovoltaic inverter port: 55 kilovolt-amperes.
• Rated current at 400 volts: 72.5 amperes.
• Rated current at 380 volts: 75.8 amperes.
• Grid relay rated current: 200 amperes.
• Generator relay rated current: 90 amperes.
• Switching time: less than 10 milliseconds.
• Generator integration: yes.
• Communication with inverter: RS485.
• Cooling: natural convection.
• Topology: non-isolated.
• Protection rating: IP65.
• Operating temperature: between -35 and 60 degrees Celsius.
• Maximum operating altitude: 4,000 meters.
• Mounting type: wall.
• Width: 510 millimeters.
• Height: 425 millimeters.
• Depth: 156 millimeters.
• Weight: approximately 16.5 kilograms.
• Safety standards: IEC 62109-1 and IEC 62109-2.
• Electromagnetic compatibility: EN 61000-6-1, EN 61000-6-2, EN 61000-6-3 and EN 61000-6-4.

Fast and flexible backup for energy storage systems

The GoodWe STS200-80-10 integrates the electrical grid, hybrid inverter, backup loads and generator into a solution designed to maintain energy supply continuity when a grid failure occurs.

Its switching time of less than 10 milliseconds, 50 kilovolt-amperes rated power, capacity of up to 55 kilovolt-amperes off-grid and up to 138 kilovolt-amperes with grid available, together with compatibility with GoodWe ET40/50 inverters, make it a key component for three-phase storage systems that need reliable backup power management.