Compact energy storage system ESS-ACDC-125-PED-SI

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Product overview
The ESS-ACDC-125-PED-SI is an integrated PV–storage–diesel power conversion system combining photovoltaic inverter functions, battery energy storage converter and an optional diesel generator interface. Designed for industrial microgrids and critical loads, it supports prioritized PV consumption, peak shaving, valley filling, multi-source hybrid supply and fast switching between grid and off-grid to maintain continuous supply.

Key features

• Flexible installation: integrated cabinet design enables compact, shoulder-to-shoulder mounting for space-efficient deployment.
• Digital management: built-in intelligent control and monitoring with touch-screen display and communication interfaces for lifecycle supervision.
• Scalable parallel connection: supports up to 4 units in off-grid mode and up to 8 units in grid-connected mode for modular expansion.
• High conversion performance: compact footprint with high PCS efficiency to maximize system energy yield and economic return.
• Optional interfaces: diesel generator integration, PV MPPT inputs (1 or 4 channels) and STS (static transfer switch) support.

Technical specifications

• Model: ESS-ACDC-125-PED-SI
• Apparent power: 110 kVA
• Rated power: 100 kW
• Rated AC voltage: 400 V
• AC voltage range (grid): 360 V - 440 V; offline: 400 V ±5%
• Rated frequency: 50/60 Hz
• Harmonic current (AC): <3% (THDi)  / THDu ≤5%
• Power factor: 0.9 before - 0.9 after
• Alternating current format: 3W+N+PE
• Output current (offline): 152 A
• Overload capacity: 110% 10 min / 120% 1 min
• DC input (battery): voltage range 680 V - 900 V; rated current 150 A
• Photovoltaic (optional): max open-circuit 950 VDC; MPPT range 200 V - 900 VDC; MPPT channels 1 or 4; PV power options 60 / 120 / 240 kW
• Diesel generator access (optional): AC input 260 Vac - 530 Vac (3L+PE); frequency 45 Hz - 65 Hz; input power factor ≥0.99; full-load efficiency >95%; input THD <5%; power options 40 kW / 80 kW
• STS (optional): rated power 200 kW; AC voltage 400 V/230 V (-20%~15%); frequency 50/60 Hz (±5 Hz); max AC power 220 kVA; max current 330 A
• Noise: ≤75 dB(A)@1m
• Operating temperature: -20°C to +45°C
• Cooling: intelligent air cooling
• Relative humidity: up to 95% (no condensation)
• Altitude: derated above 2,000 m
• Online/offline switching time: <10 ms (STS)
• Display / Communication: touch screen, RS485 / LAN; reserve DO/DI

Applications and integration

• Industrial microgrids, remote or off-grid industrial sites and island systems.
• Backup power for critical facilities, telecom sites and construction camps.
• Hybrid renewable installations combining PV, battery storage and diesel gensets with centralized digital control.
• System integration services: site assessment, parallel scaling and diesel/PV commissioning.