Product Overview

Grid Connected Battery Storage is designed for facilities that interact actively with the utility grid - not just consuming power, but managing how and when energy flows in both directions. Where a basic storage system simply stores and releases energy, this platform adds bidirectional grid interaction, power quality regulation, and real-time frequency/voltage support as native capabilities.

The integrated PCS (Power Conversion System) handles seamless grid synchronization, anti-islanding, and reactive power compensation. Whether you are participating in demand response programs, feeding surplus solar back to the grid, or stabilizing voltage on a weak distribution feeder, this system treats the grid connection as a controllable asset rather than a passive link.

Technical Specifications

Parameter	Specification
Battery Chemistry	LFP (LiFePO₄)
System Capacity	100 kWh-5 MWh (modular stacking)
PCS Rated Power	50 kW-2,500 kW
AC Output Voltage	380V/400V/480V
Grid Frequency Support	50 Hz/60 Hz, droop & virtual inertia modes
Reactive Power Range	±0.9 leading/lagging, 4-quadrant operation
Power Factor	Adjustable from 0.8 leading to 0.8 lagging
Round-Trip Efficiency	≥ 93%
THD (Current)	< 3% at rated power
Anti-Islanding	Compliant with IEEE 1547/EN 50549
Grid Fault Ride-Through	LVRT/HVRT per local grid code
Communication	Modbus TCP/RTU, IEC 61850, DNP3, OCPP
Protection Rating	IP55 (outdoor) / IP20 (indoor)
Cycle Life	≥ 6,000 cycles @ 90% DoD
Operating Temperature	-20 °C to +55 °C
Certifications	IEC 62619, IEC 62477, UL 1741 SA, CE, G99
Design Life	15 years

Core Functions

Bidirectional Power Flow

The 4-quadrant PCS enables both import and export of active and reactive power. The system can absorb excess generation, inject stored energy during high-price windows, or provide reactive support.

Power Quality Regulation

Voltage sags, swells, and harmonic distortion are corrected in real time. The system injects or absorbs reactive power within milliseconds, maintaining voltage within ±2% of nominal at the point of common coupling (PCC). Current THD stays below 3%, meeting the strictest utility interconnection requirements.

Frequency Response & Ancillary Services

Configurable droop curves and virtual inertia emulation allow the system to participate in primary frequency response markets. Response time from idle to full power is under 200 ms, fast enough for most ancillary service programs worldwide.

Demand Response Participation

The EMS accepts external dispatch signals via OpenADR 2.0b, Modbus, or proprietary utility protocols. When the grid operator calls for load reduction, the system discharges automatically, earning demand response revenue while protecting your facility from curtailment.

Typical Application Scenarios

Industrial Park with Rooftop Solar and Grid Export

A 50,000 m² industrial park generates 2.5 MWp from rooftop PV but faces grid export limits of 500 kW imposed by the local distribution network operator. A 2 MWh grid-connected storage system absorbs excess solar during midday, then exports it during evening peak hours when feed-in tariffs are highest. The PCS manages ramp-rate limits automatically, ensuring export never exceeds the permitted threshold. Annual revenue from optimized export timing increased by 22% compared to direct curtailment.

Data Center on a Weak Distribution Feeder

A 5 MW data center connected to a rural 33 kV feeder experiences voltage fluctuations of ±6% during peak agricultural load seasons. A 1 MWh / 500 kW grid-connected system provides continuous voltage regulation at the PCC, injecting reactive power during sags and absorbing during swells. The data center avoided a $2.3M dedicated feeder upgrade while maintaining Tier III uptime requirements.

Commercial Facility Participating in Frequency Regulation Market

A logistics hub in a deregulated electricity market enrolled its 500 kWh grid-connected system in the regional frequency regulation market. The system responds to AGC (Automatic Generation Control) signals every 4 seconds, providing symmetric regulation capacity. The facility earns $3,800/month in ancillary service payments, a revenue stream that did not exist before storage installation, effectively subsidizing the system's capital cost.

Utility-Scale Solar Farm with Grid Code Compliance

A 20 MWp solar farm in the Middle East was required to provide LVRT (Low Voltage Ride-Through) and reactive power support as conditions of its grid connection agreement. Rather than oversizing the inverter fleet, the developer added a 5 MWh grid-connected storage system at the point of interconnection. The storage handles fault ride-through, ramp-rate compliance, and nighttime reactive support,functions the solar inverters cannot perform after sunset.

Selection Guide

Choosing the right configuration depends on your grid connection type, local interconnection standards, and intended revenue streams. Key decision points:

Grid Scenario	Recommended Configuration	Key Feature
Behind-the-meter, no export	100–500 kWh, single PCS	Peak shaving PQ correction
Behind-the-meter, grid export	500 kWh–2 MWh, bidirectional PCS	TOU arbitrage export optimization
Front-of-meter / utility-scale	2–5 MWh, multi-PCS parallel	Frequency regulation LVRT/HVRT
Weak grid / island-prone	500 kWh–1 MWh, grid-forming PCS	Voltage support seamless islanding

Our application engineers can review your single-line diagram and grid connection agreement to recommend the optimal system architecture. Reach out with your project details for a no-cost technical consultation.

FAQ

Q: Can this system operate in both grid-tied and off-grid modes?

A: Yes. With the grid-forming PCS option, the system transitions seamlessly between grid-tied and islanded operation. Transfer time is under 20 ms, fast enough to maintain power to critical loads without interruption.

Q: What grid codes does the PCS support?

A: The PCS firmware supports configurable grid code profiles including IEEE 1547 (US), EN 50549 (EU), G99 (UK), AS/NZS 4777.2 (Australia), and DEWA/SEWA (UAE). Custom profiles can be loaded for other markets.

Q: How does the system handle grid faults?

A: The system provides both LVRT and HVRT per the configured grid code. During a voltage sag, the PCS injects reactive current to support grid voltage recovery. During a high-voltage event, it absorbs reactive power. If the fault persists beyond the ride-through window, the system disconnects safely per anti-islanding requirements.

Q: Is remote monitoring included?

A: Every system ships with cloud-based monitoring as standard. The dashboard provides real-time power flow, SOC, grid voltage/frequency, PQ metrics, and historical analytics. API access is available for integration with third-party SCADA or energy management platforms.

Hot Tags: grid connected battery storage, China grid connected battery storage manufacturers, suppliers, factory