Description
Product Positioning
The MSP500HCG2 is a 500kW all-in-one hybrid solar storage inverter cabinet designed for commercial and industrial (C&I) microgrids requiring high-power solar integration, battery energy storage, and seamless grid-tie/off-grid operation. Integrating a 500kVA PCS, four independent MPPT channels (480kWp total PV capacity), four battery DC/DC converters, EMS, and a PCM transfer switch inside a single 1350×2200×850mm cabinet, the MSP500HCG2 eliminates the complexity of multi-vendor system integration. With active grid-tie/off-grid switching at 0ms and passive transfer under 10ms, it ensures uninterrupted power for critical loads even in weak-grid or off-grid environments across Southeast Asia, Africa, the Middle East, and Latin America.
Product Overview
At the core of the MSP500HCG2 is a four-channel DC-coupled architecture that sets it apart from conventional 2-channel hybrid inverters. Four independent MPPT trackers, each rated at 120kW and 200A, accept PV arrays from 200V to 950V, enabling flexible string design for large rooftop or ground-mount solar installations. Four bidirectional battery DC/DC converters, each handling 200A across a 680–900V DC bus, support parallel battery strings for scalable energy storage capacity. The integrated 500kVA PCS delivers 724A at 400V/230V three-phase output, with overload capability up to 1.25× rated current for 100 seconds and 1.25× for 300ms during motor starting or surge events.
The cabinet supports diesel generator hybrid operation, automatically forming a stable microgrid when the utility grid is unavailable and synchronizing with the genset to optimize fuel consumption. An 800A internal bypass provides maintenance-free grid pass-through, while the optional external isolation transformer enables black-start capability. Up to three units can be paralleled for a total system capacity of 1500kW, making the MSP500HCG2 suitable for factories, commercial complexes, mining sites, and remote area power systems.
MSP500HCG2 — 500kW All-in-One Hybrid Solar Storage Inverter Cabinet
Technical Specifications
| Parameter | MSP500HCG2 Specification |
|---|---|
| Battery Parameters | |
| Max Battery Voltage | 950V DC |
| Min Battery Voltage | 680V DC |
| Rated Battery Voltage Range | 680V – 900V DC |
| Max Battery Current | 200A × 4 channels |
| Charging Efficiency | >99.3% |
| PV (Solar) Parameters | |
| PV Power | 120kW × 4 = 480kWp |
| Max PV Voltage | 950V DC |
| Min PV Voltage | 200V DC |
| MPPT Voltage Range | 600V – 900V DC |
| Max Input Current | 200A × 4 channels |
| AC Side — Grid-Tie (On-Grid) | |
| Rated Power | 500kVA |
| Rated Current | 724A |
| Rated Grid Voltage | 400V / 230V (3-phase+N) |
| Grid Voltage Range | -20% ~ +15% |
| Grid Frequency Range | 50Hz (47–52Hz) / 60Hz (57–62Hz) |
| Grid Unbalance Tolerance | 125% |
| Current THD | <3% (at >30% load) |
| Power Factor | -1 ~ 1 (adjustable) |
| AC Side — Off-Grid (Standalone) | |
| Rated Output Power | 500kVA |
| Max Output Power | 550kVA |
| Rated Output Current | 724A (max 796.4A) |
| Output Voltage THD | <2% (resistive load) |
| Unbalance Load Capability | 100% |
| Output Frequency | 50/60Hz |
| Overload Capability | 1.1×–1.25× for 100s; 1.25× for 300ms |
| System Parameters | |
| Grid-Tie/Off-Grid Transfer | Active: 0ms | Passive: <10ms |
| Parallel Units | Up to 3 units (1500kW total) |
| Isolation Transformer | None (external transformer supported for black-start) |
| Bypass Function | 800A |
| Protection Rating | IP20 (indoor) / IP55 (outdoor, optional) |
| Dimensions (W×H×D) | 1350 × 2200 × 850 mm |
| Weight | ≈850 kg |
| Operating Temperature | -30°C ~ 60°C (derating above 45°C) |
| Humidity | 10% – 95% (non-condensing) |
| Cooling Method | Forced air cooling |
| Altitude | Up to 4000m (derating above 2000m) |
Core Advantages
1. Four-Channel MPPT for 480kWp Solar Integration
Unlike conventional hybrid inverters that limit PV input to two MPPT channels, the MSP500HCG2 delivers four independent 120kW MPPT trackers, each accepting 200A at 600–900V. This four-channel design is critical for large C&I rooftop installations where multiple roof orientations, shading patterns, or string lengths would otherwise cause mismatch losses on a 2-channel system. With a total PV capacity of 480kWp against 500kW PCS rating, the MSP500HCG2 achieves a near-1:1 PV-to-PCS ratio, maximizing solar self-consumption and reducing curtailment during peak irradiance hours.
2. Sub-10ms Grid-Tie/Off-Grid Transition for Critical Loads
The integrated PCM (Power Conversion Module) transfer switch enables active grid-tie/off-grid switching at 0ms when the grid failure is pre-detected, and passive transfer within 10ms for unplanned outages. This is significantly faster than the industry typical 20–50ms transfer time of external ATS (Automatic Transfer Switch) solutions. For manufacturing facilities with PLC-controlled production lines, data centers, and healthcare facilities, this sub-10ms transition prevents equipment shutdown, production scrap, and data loss. The off-grid output maintains <2% voltage THD and supports 100% unbalanced loads, ensuring clean power for sensitive electronic equipment.
3. Diesel Generator Hybrid & Grid-Forming Capability
In off-grid or weak-grid regions where diesel generators are the primary power source, the MSP500HCG2 operates as a grid-forming inverter, establishing a stable 400V/50Hz reference and synchronizing with one or more diesel gensets. The EMS automatically dispatches solar and battery power to reduce genset runtime — typically cutting diesel consumption by 40–60% in hybrid configurations. When the battery is depleted and solar is unavailable, the 800A internal bypass routes grid or genset power directly to the load, ensuring continuous supply while the PCS undergoes maintenance. Black-start capability is available with an optional external isolation transformer.
4. ALL-IN-ONE Cabinet Design for Rapid Deployment
The MSP500HCG2 integrates PCS, four MPPT converters, four battery DC/DC converters, EMS, PCM transfer switch, AC/DC distribution units, diesel generator control interface, and surge protection devices inside a single 1350×2200×850mm cabinet. This all-in-one architecture eliminates the need for separate PCS cabinets, DC combiner boxes, and external transfer switches, reducing installation footprint by approximately 40% compared to component-based systems. Pre-wired and factory-tested, the cabinet can be commissioned on-site within 1–2 days, making it ideal for remote projects where skilled labor is scarce. Up to three units parallel for 1500kW systems without additional master-slave controllers.
Application Scenarios
C&I Solar + Storage Microgrids (Grid-Tie with Backup)
For factories, warehouses, and commercial buildings in regions with high electricity tariffs or demand charges, the MSP500HCG2 maximizes solar self-consumption through its 480kWp PV input and performs peak shaving using battery storage. When the grid is available, it operates in grid-tie mode with anti-reverse power flow control; during outages, it seamlessly switches to off-grid mode to power critical loads. The four MPPT channels handle complex rooftop layouts with multiple orientations.
Off-Grid Diesel Hybrid Power Stations
In remote mining sites, construction camps, and island communities without reliable grid access, the MSP500HCG2 forms the core of a diesel-solar-battery hybrid system. It operates as the grid-forming unit, synchronizing with diesel generators and dispatching solar and battery power to minimize fuel consumption. The 550kVA max overload capability handles motor starting surges from mining equipment and water pumps, while the 100% unbalance load support accommodates single-phase loads common in camp facilities.
Industrial Critical Load Backup & Power Quality Improvement
For manufacturing plants with voltage-sensitive production equipment, the MSP500HCG2 provides uninterrupted power through its sub-10ms transfer and acts as an active power quality conditioner. It compensates for voltage sags, swells, and frequency deviations common in weak grids, while the 125% grid unbalance tolerance ensures stable operation even on heavily distorted distribution networks. The IP55 outdoor option allows installation in harsh industrial environments with dust, moisture, and temperature extremes.
System Topology & Operating Modes
The MSP500HCG2 employs a DC-coupled hybrid architecture where PV arrays and battery packs connect to a common 680–900V DC bus through independent DC/DC converters. The PCS then converts DC power to 400V three-phase AC for grid-tie or off-grid output. This topology enables simultaneous charging from PV and grid, flexible power routing, and high overall system efficiency.
The integrated EMS supports seven operating modes: grid-tie with peak shaving (charge during off-peak, discharge during peak), self-consumption optimization (prioritize solar for local load), time-of-use arbitrage (schedule charge/discharge based on tariff), backup power (off-grid operation during outages), diesel hybrid (minimize genset runtime), frequency response (grid support services), and manual dispatch (operator-controlled). SOC balancing across parallel battery strings is managed automatically to maximize cycle life.
Service & Delivery
ImaxPWR provides end-to-end support from system design to after-sales maintenance. Our engineering team assists with PV string design, battery capacity sizing, and microgrid simulation before delivery. Each cabinet undergoes full-load burn-in testing at our Shenzhen factory, including grid-tie/off-grid transfer tests, overload verification, and parallel operation validation. Standard warranty covers 24 months, with extended warranty options available. On-site commissioning and training are offered for projects above 500kW. Remote monitoring via cloud platform enables real-time performance tracking, fault diagnosis, and firmware updates without site visits.
Frequently Asked Questions
Q: What is the difference between MSP500HCG2 and MSP250HCG2?
A: The MSP500HCG2 is the 500kW version with four MPPT channels (480kWp PV) and four battery DC/DC converters (200A×4), while the MSP250HCG2 is the 250kW version with two MPPT channels (240kWp PV) and two battery converters (200A×2). The 500kW unit also has a higher bypass rating (800A vs 400A) and supports up to 1500kW parallel capacity. Both share the same all-in-one cabinet form factor and control platform.
Q: Can the MSP500HCG2 operate without a battery (PV-only mode)?
A: Yes. The MSP500HCG2 can operate as a grid-tie solar inverter without battery connection, using its four MPPT channels to feed 480kWp of solar directly to the grid or load. The battery DC/DC converters simply remain idle. However, off-grid backup and peak shaving functions require a connected battery system.
Q: What battery chemistries are compatible?
A: The MSP500HCG2 is compatible with lithium iron phosphate (LFP), lithium titanate (LTO), and lead-acid battery systems operating within the 680–900V DC range. The EMS communicates with the battery BMS via CAN or RS485 to monitor SOC, SOH, and cell voltages. For high-voltage battery systems above 900V, an external DC/DC converter may be required.
Q: How many units can be paralleled and is a master controller needed?
A: Up to three MSP500HCG2 cabinets can be paralleled for a total system capacity of 1500kW. No external master controller is required — the units communicate via a dedicated parallel bus and automatically negotiate master/slave roles. Parallel operation supports both grid-tie and off-grid modes, with automatic load sharing and circulating current suppression.
Q: Is the IP55 outdoor version suitable for desert or coastal environments?
A: The IP55 option provides protection against dust ingress and low-pressure water jets from any direction, making it suitable for desert and coastal installations. For highly corrosive coastal environments with salt spray, we recommend additional anti-corrosion coating on the cabinet exterior and scheduled maintenance of air filters. The -30°C to 60°C operating temperature range covers most desert and tropical climates, with automatic derating above 45°C to protect power semiconductors.
Related Products
- MSP250HCG2 250kW All-in-One Hybrid Solar Storage Inverter Cabinet — Same architecture, 2-channel MPPT, 240kWp PV, IP54, for smaller C&I installations
- MSP100HKST / MSP125HKST PCS Energy Storage Inverters — 100kW/125kW bidirectional PCS modules with STS, building blocks for custom storage systems
- BIPV320K6 320kW Wall-Mounted Hybrid MPPT Controller — High-power MPPT charge controller for large-scale solar + storage retrofits
- Common DC Bus Energy Storage: 4 Scenarios Selection Guide — Technical blog on DC-coupled vs AC-coupled architecture selection for C&I microgrids
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About the Author
Ethan Li — Chief Engineer at ImaxPWR Power Co., Ltd. With over 15 years of experience in power electronics and energy storage systems, Ethan has led the design and deployment of more than 100 microgrid and C&I storage projects across Southeast Asia, Africa, and the Middle East. He specializes in hybrid PCS topology design, grid-forming control, and diesel-solar-battery hybrid optimization.
About ImaxPWR
ImaxPWR Power Co., Ltd. is a national high-tech enterprise headquartered in Shenzhen, China, specializing in R&D, manufacturing, and sales of power conversion systems for energy storage and renewable energy. Our product portfolio includes hybrid inverters, bidirectional PCS, DC/DC MPPT converters, energy management systems, and all-in-one storage cabinets. With IEC and CE certified products deployed in over 30 countries, ImaxPWR delivers reliable power solutions for weak-grid, off-grid, and high-temperature environments.
Contact us for a customized solution:
- Email: info@imaxpwr.com
- Phone/WhatsApp: +86-13760212825
- Website: https://imax-pwr.com
© 2026 ImaxPWR Power Co., Ltd. All rights reserved. Specifications are subject to change without notice. Product images are for reference only.
