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Integrated photovoltaic and energy storage low-voltage cabinet

Integrated photovoltaic and energy storage low-voltage cabinet

PV-Storage Low-Voltage Integrated CabinetA highly integrated all-in-one energy storage solution designed for commercial and industrial off-grid/hybrid power systems, available in multiple models (6kW/12kW/18kW/20kW power output with 14.348kWh–57.638kWh LFP battery capacity).

Key advantages include ultra-fast grid/off-grid switching (≤20ms), compatibility with diesel generators, support for 200% overload output, plug-and-play installation with self-parallel operation, modular design for easy maintenance, and anti-backflow mode for self-consumption.

Built with IP54 protection, wide temperature adaptability (-25℃ to 55℃), and certified to CE/IEC/UL standards, it delivers reliable, efficient power for diverse applications.

Overview
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Product Description

PV-Storage Low-Voltage Integrated Cabinet: The Ultimate All-in-One Energy Storage Solution

In the rapidly evolving landscape of renewable energy, the PV-Storage Low-Voltage Integrated Cabinet stands out as a game-changing solution for commercial, industrial, and small-scale utility applications seeking reliable, efficient, and flexible power management. This fully integrated system combines photovoltaic (PV) charge control, lithium iron phosphate (LFP) battery storage, bidirectional inversion, and intelligent grid/off-grid switching into a single, compact cabinet—eliminating the complexity of separate component installation and delivering a turnkey energy storage solution that balances performance, durability, and ease of use.

Core Design & Performance Advantages

Available in five versatile models (ESS1-6kW/14.348kWh, ESS3-12kW/28.688kWh, ESS1-18kW/43.034kWh, ESS3-18kW/28.688kWh, ESS3-20kW/57.638kWh), this cabinet is engineered to meet diverse power demands, with rated output power ranging from 6kW to 20kW and energy storage capacity from 14.348kWh to 57.638kWh. At its core lies a high-performance LFP battery pack with a 48V system voltage, 60A maximum charging current, and a wide working voltage range (40-54.8V), ensuring stable energy storage and discharge even under fluctuating load conditions. The PV input section supports up to 35kW of solar power input (depending on the model), with MPPT voltage range of 60-450V and multiple MPPT channels (up to 8 channels for the 20kW model), maximizing solar energy harvesting efficiency.

One of the most standout features is its ultra-fast grid/off-grid switching capability, with a switching time of ≤20ms—controllable and fully compatible with diesel generators. This ensures seamless power transition during grid outages or peak demand periods, eliminating downtime for critical equipment and ensuring uninterrupted operation for businesses and industrial facilities. Additionally, the system supports 200% overload output (e.g., 6kW rated model delivers 12kW peak power), making it capable of handling sudden surges in power demand without compromising performance or safety.

Ease of Installation & Maintenance

Designed with user-friendliness in mind, the PV-Storage Low-Voltage Integrated Cabinet features a plug-and-play design that enables quick installation with minimal tools and no complex wiring. It supports self-parallel operation (up to 8 units in parallel), allowing users to scale their energy storage capacity as their needs grow—ideal for small to medium-sized commercial sites, remote communities, or industrial facilities with expanding power requirements. The modular construction further simplifies maintenance: faulty modules can be replaced quickly without disrupting the entire system, reducing downtime and long-term operational costs.

The cabinet’s compact footprint (dimensions range from 700×1200×900mm to 1400×700×2350mm, depending on the model) and lightweight design (500kg to 700kg) make it suitable for both indoor and outdoor installation, even in space-constrained environments. Its robust build quality is complemented by IP54 protection rating, dust and water resistance, and a wide operating temperature range (-25℃ to 55℃, with derating only above 40℃), ensuring reliable performance in harsh climatic conditions from extreme cold to high heat. Relative humidity tolerance (0-95% RH, no condensation) further enhances its adaptability to diverse geographical locations.

Product Parameters

Key Features:
• Grid/off-grid switching time ≤20ms (controllable), compatible with diesel generators
• Easy installation, self-parallel operation, maintenance-free
• Easy to install, fewer installation tools required, faster structure
• Supports 200% overload output
• Easy maintenance, modular design, quick replacement of faulty modules
• Supports self-use & anti-backflow mode
Parameter Category	Parameter Name	Model
Parameter Category	Parameter Name	ESS1-6kW/14.348kWh	ESS3-12kW/28.688kWh	ESS1-18kW/43.034kWh	ESS3-18kW/28.688kWh	ESS3-20kW/57.638kWh
PV Input	Max PV Input Power	6kW	18kW	27kW	18kW	35kW
	Max PV Input Current	15A	50A	75A	42kW	43kW
	Rated DC Voltage	350Vdc	350Vdc	350Vdc	350Vdc	350Vdc
	MPPT Voltage Range	60-450V	60-450V	60-450V	60-450V	60-450V
	Max Input Current	30A	40A/40A	30A/30A/30A	17A×4	13A×8
	Number of MPPT Channels	January 2nd	January 2nd	January 2nd	4	8
	Max PV Input Current per String	-	-	-	15A	15A
	Number of Strings per MPPT	-	-	-	4	8
Battery Input/Output	Nominal Voltage	40-60V	40-60V	40-60V	40-60V	40-60V
	Max Charging Power	120A/60A	240A/80A	360A/180A	210A/210A	420A/210A
	Max Discharging Power	120kW/12kW	120kW/12kW	180kW/180kW	120kW/10.78kW	420A/215kW
	Battery Communication	RS485/CAN	RS485/CAN	RS485/CAN	RS485/CAN	RS485/CAN
	Max Charging Current	-	-	-	15A	15A
	Max Discharging Current	-	-	-	15A	15A
Inverter Output	Rated Output Power	6kW	12kW	18kW	18kW	20kW
	Max Output Power	12kW	24kW	36kW	36kW	40kW
	Rated Output Current	27.3A	54.5A	81.8A	15.54A	31.8A
	Max Output Current	28A	56A	84A	15.9A	36.8A
	Output Voltage Range	LP/N/PE 220V/50Hz/60Hz	LP/N/PE 220V/50Hz/60Hz	LP/N/PE 220V/50Hz/60Hz	3P4W 220/380V/50Hz/60Hz	3P4W 220/380V/50Hz/60Hz
	Output Voltage Regulation Rate	±2%	±2%	±2%	±2%	±2%
	Max Output Power (Grid-connected)	-	-	-	18kW	20kW
	Max Output Current (Grid-connected)	-	-	-	24.5A	26.3A
Grid Input	Max Input Power	10kW	20kW	30kW	20kVA	40kVA
	Max Input Current	100A	100A	100A	24A	44A
	Input Voltage Range	176-253V	176-253V	176-253V	198-242V	198-242V
	Max Output Power (Off-grid)	10kW	20kW	30kW	20kW	40kW
	Max Output Current (Off-grid)	6.2kW	12.4kW	18.6kW	18kW	25kW
	Max Input Current (Off-grid)	20A	50A	60A	14.5A	29A
Backup Input	Connection Mode	Support	Support	Support	Support	Support
	Working Mode	Parallel Connection	Parallel Connection	Parallel Connection	Parallel Connection	Parallel Connection
	Max Input/Output Power	6kW	12kW	24kW	24kW	24kW
	Rated Voltage	LP/N/PE 220V/50Hz/60Hz	LP/N/PE 220V/50Hz/60Hz	LP/N/PE 220V/50Hz/60Hz	3P4W 220/380V/50Hz/60Hz	3P4W 220/380V/50Hz/60Hz
	Rated Current	-	-	-	-	-
Battery Parameters	Nominal Capacity per Set	14.348kWh	28.688kWh	43.034kWh	28.688kWh	57.638kWh
	Number of Battery Modules per Set	14.348kWh/1	14.348kWh/2	14.348kWh/3	14.348kWh/2	14.348kWh/4
	Working Voltage Range	40-54.8V	40-54.8V	40-54.8V	40-54.8V	40-54.8V
	System Voltage	48V	48V	48V	48V	48V
	Max Charging Current	60A	60A	60A	60A	60A
	Dimensions (L×W×H)	1020×700×2350mm	1020×700×2350mm	1020×700×2350mm	1400×700×2350mm	1400×700×2350mm
	Weight	1020kg	1020kg	1020kg	1020kg	1020kg
	Cell Type	LFP	LFP	LFP	LFP	LFP
System Parameters	Max Efficiency	97.50%	97.50%	97.50%	95.10%	95.10%
	Protection Grade	IP54	IP54	IP54	IP54	IP54
	Operating Temperature	-25-55℃ (derating above 40℃)	-25-55℃ (derating above 40℃)	-25-55℃ (derating above 40℃)	-25-55℃ (derating above 40℃)	-25-55℃ (derating above 40℃)
	Relative Humidity	0-95%RH (no condensation)	0-95%RH (no condensation)	0-95%RH (no condensation)	0-95%RH (no condensation)	0-95%RH (no condensation)
	Cooling Method	Air Cooling	Air Cooling	Air Cooling	Air Cooling	Air Cooling
	Cabinet Dimensions	700×1200×900mm	700×1200×900mm	700×1200×900mm	700×1200×900mm	700×1200×900mm
	Cabinet Weight	500kg	700kg	700kg	500kg	700kg
	Fire Protection	Aerosol	Aerosol	Aerosol	Aerosol	Aerosol
Functions	Anti-backflow Function	Support	Support	Support	Not Support	Not Support
	Grid/Off-grid Switching	Support	Support	Support	Support	Support
	Remote Monitoring	Support	Support	Support	Support	Support
	Communication Protocol	CT/MT/TER	CT/MT/TER	CT/MT/TER	CT/MT/TER	CT/MT/TER
	Number of Parallel Units	8	8	8	8	8
Certification	Certification	CE, IEC61000, IEC62109, UL983.3	CE, IEC61000, IEC62109, UL983.3	CE, IEC61000, IEC62109, UL983.3	CE, IEC61000, IEC62109, UL983.3	CE, IEC61000, IEC62109, UL983.3

Integrated photovoltaic and energy storage low-voltage cabinet

Advanced Functionality & Safety

The system is equipped with a comprehensive suite of intelligent functions to optimize energy usage and ensure safety. It supports anti-backflow mode for self-consumption, allowing users to maximize on-site solar energy utilization and reduce reliance on the grid—lowering electricity bills and carbon footprint. Remote monitoring capabilities (via CT/MT/TER communication protocols) enable real-time tracking of energy production, storage, and consumption, as well as system health status, from any internet-connected device. This empowers users to make data-driven decisions to optimize energy efficiency and proactively address potential issues before they escalate.

Safety is a top priority in the design of this integrated cabinet. It features air cooling technology to maintain optimal operating temperatures, aerosol fire protection to mitigate fire risks, and multiple layers of protection against overcharging, over-discharging, short circuits, and overheating. The system complies with international safety and performance standards, including CE, IEC61000, IEC62109, and UL983.3, ensuring compliance with global regulatory requirements and giving users peace of mind regarding product quality and safety.

Integrated photovoltaic and energy storage low-voltage cabinet

Application Versatility

The PV-Storage Low-Voltage Integrated Cabinet is a versatile solution suitable for a wide range of applications:

Commercial Buildings: Power retail stores, offices, and shopping malls with clean solar energy, reduce peak demand charges, and ensure backup power during grid outages.

Industrial Facilities:Support manufacturing lines, warehouses, and processing plants with stable, reliable power, minimize downtime, and lower energy costs through self-consumption.

Remote Communities & Off-Grid Sites: Provide sustainable power to rural villages, mining camps, or telecom towers in areas without grid access, replacing costly and polluting diesel generators.

Microgrids: Integrate into community or campus microgrids to enhance energy resilience, balance load demand, and support renewable energy integration.

Conclusion

The PV-Storage Low-Voltage Integrated Cabinet redefines what is possible with small to medium-scale energy storage. Its combination of high performance, ease of installation, intelligent functionality, and robust safety features makes it an ideal choice for businesses and organizations looking to transition to renewable energy, reduce energy costs, and enhance power resilience. Whether used as a standalone off-grid system, a backup power solution, or part of a hybrid grid-tied setup, this integrated cabinet delivers consistent, efficient, and cost-effective power—backed by international certifications and a design built to withstand the rigors of real-world operation. With its scalable design and user-centric features, it is not just an energy storage product, but a long-term investment in sustainable and reliable power.