107kWh 50kVA Commercial BESS with High-Current PV Integration for C&I Energy Storage System Projects

107kWh 50kVA Commercial BESS for High-Current PV Integration

For commercial solar projects, selecting a battery energy storage system requires more than checking battery capacity and AC output. PV array voltage, input current and solar string configuration must also be considered when connecting photovoltaic generation to the energy storage equipment.

The Voltertech BESS-107KWH-50KW-W is a 107kWh air-cooled LiFePO4 energy storage system with 50kVA rated AC output. An optional dual-channel PV configuration provides up to 38.4kW input per channel, with a specified maximum current of 64A per channel for high-current commercial solar array integration.

Optional Dual-Channel PV Input for Commercial Solar Arrays

The optional PV configuration provides two input channels, each rated for a maximum of 38.4kW. This gives solar EPC contractors an option for integrating photovoltaic generation into the commercial battery storage system.

Each channel has a specified maximum input current of 64A. When selecting solar modules and arranging PV strings, engineers must evaluate the combined current of the connected strings rather than relying only on the total array power.

The two input ratings describe the optional photovoltaic input capability. They do not mean the system provides 76.8kW of continuous AC output, which is governed by the PCS specifications.

PV Voltage Matching and MPPT Design

The PV input specification lists an MPPT operating voltage range of 200–800V, a starting voltage of 250V and a maximum PV voltage of 850V.

These limits are important when determining the number of solar modules in series. The selected PV string must provide sufficient voltage for start-up and MPPT operation without exceeding the maximum permitted input voltage under low-temperature conditions.

Solar module open-circuit voltage, temperature coefficients, operating current and string arrangement should be reviewed before the final PV design is approved.

50kVA AC Output and 107kWh Battery Storage

The system provides 50kVA rated output for both grid-connected and off-grid configurations, with a specified maximum off-grid output of 55kVA. The AC operating voltage is 230/400V.

The battery section uses 280Ah LiFePO4 cells with 107kWh nominal energy and 384V nominal voltage. Its operating voltage range is 312–432V.

When designing a commercial solar-plus-storage installation, engineers should evaluate PV generation, battery charging requirements, AC load demand and the selected operating mode as separate but coordinated parts of the system.

Air Cooling and Cabinet Installation

The energy storage cabinet uses air cooling for thermal management and features IP54 enclosure protection. Its specified operating temperature range is -20°C to +50°C.

With dimensions of 1203 × 900 × 2350mm and an approximate net weight of 1260kg, the system requires suitable handling equipment, structural support and service access.

Installers should also provide the required airflow clearance and environmental protection according to the manufacturer's installation instructions.

Communication and PV System Commissioning

LAN, RS485 and CAN communication interfaces are listed in the system specification for integration with compatible monitoring and control equipment.

Commissioning should include verification of PV polarity, string voltage, input current, battery operating limits, AC connections and communication settings.

The optional PV hardware, applicable control functions and communication protocols should be confirmed before the equipment is ordered for a specific project.

Technical Specifications

Applications for Commercial PV Integration

The BESS-107KWH-50KW-W can be evaluated for commercial rooftop solar projects, agricultural PV installations, factory solar-plus-storage systems and distributed renewable energy projects.

For system integrators, the principal design considerations include available PV generation, input current limits, battery energy requirements, AC output capability and the intended operating strategy.

Frequently Asked Questions

1. Can the system accept two 38.4kW PV input channels?

The optional PV configuration specifies two channels rated at 38.4kW each. Buyers should confirm that the required PV input hardware is included in the selected equipment configuration.

2. What does the 64A PV input current rating mean?

The specification lists a maximum current of 64A for each PV input channel. Engineers must check the total current of the connected strings against the approved channel limits and connection requirements.

3. How should solar panel strings be matched to this BESS?

The optional PV input has a 200–800V MPPT range, a 250V starting voltage and an 850V maximum PV voltage. String design must account for solar module electrical characteristics and temperature-related voltage changes.

4. Does 76.8kW total optional PV input mean 76.8kW AC output?

No. The combined PV input rating describes the optional solar input capability. The system's rated AC output is 50kVA, and available active power must be evaluated according to PCS operating conditions and power factor.

5. What should an EPC contractor provide for a technical quotation?

Please provide the PV module datasheet, proposed string configuration, maximum array current, AC load requirements, battery operating objectives and installation location. These details help determine the appropriate system and PV input configuration.