Solar Backup Power | Ironbull SSI Off-Grid Solar System

In today's world of rapidly upgrading energy structures and increasingly stringent requirements for power stability, a truly reliable, stable, and shock-resistant photovoltaic-storage system is no longer just a simple "backup power source," but a crucial guarantee for businesses and households to achieve energy independence. As a world-renowned battery manufacturer, ONESUN, based on years of experience in energy storage system R&D and project practice, has launched the new Ironbull series SSI-3/5/10kW 5/10/20kWh integrated photovoltaic-storage system, providing a truly stable, powerful, and durable small-scale solar power plant solution for large residential and small-to-medium-sized commercial and industrial users.

Ironbull SSI Off-Grid Solar System

The Ironbull SSI series highly integrates the inverter, controller, and battery system into a single unit, achieving a true "photovoltaic-storage integrated" design. This not only significantly reduces system connection complexity but also improves overall operational stability. The entire unit comes pre-optimized with factory settings, making installation and commissioning simple and quick. It supports wall-mounted or ground-mounted installations to adapt to different spatial layouts. For scenarios with high power loads, such as residential villas, small factories, shops, office buildings, and communication base stations, it can operate as an independent off-grid power station or work in conjunction with the existing grid to provide continuous and stable power support.

Model	SSI-3kW5,12kWh	SSI-5kW10kWh	SSI-10kW20kWh
AC Input Parameters
AC Input Voltage	220VAC	220VAC	220VAC
AC Input Voltage Range	154~264±3VAC (Normal)	185~264±3VAC (UPS)	185~264±3VAC (UPS)
Max AC Charging Current	63A	63A	104A
Input Frequency	50/60Hz±5%	50/60Hz±5%	50/60Hz±5%
PV Parameters
PV Max Power	1600W	6400W	6400W
PV Working Method	MPPT	MPPT	MPPT
PV Input Voltage Range	30~150V	60~150V	60~150V
PV Max open Voltage	150V	150V	150V
PV Max Input Current	60A	120A	120A
Battery Data
Battery Type	LiFePO4	LiFePO4	LiFePO4
Battery Voltage	25.6VDC	51.2V DC	51.2V DC
Battery Capacity	200Ah	200Ah	400Ah
Battery Energy	5.12kWh	10.24kWh	20.48kWh
Continued Discharge Current	200A	200A	400A
MAX Discharge Current	300A	300A	600A
AC Output Parameters
Rated Output Power	3500VA/3000W	6000VA/5000W	12000VA/10000W
Output Voltage	220VAC±10%	220VAC±10%	220VAC±10%
Output Frequency	50Hz/60Hz±1%	50Hz/60Hz±1%	50Hz/60Hz±1%
Output Waveform	Sine Wave	Sine Wave	Sine Wave
Conversion Time	≤10ms (UPS) / ≤20ms (INV)	≤10ms (UPS) / ≤20ms (INV)	≤10ms (UPS) / ≤20ms (INV)
Overload Capacity	≤1.3 Rated 30S	≤1.3 Rated 30S	≤1.3 Rated 30S
Impact Resistance	≤3 Rated 10mS	≤3 Rated 10mS	≤3 Rated 10mS
Standard Parameters
Protection Function	Input over/under protection, battery overcharge/overdischarge protection, battery over-temperature protection, overload protection, short circuit protection, and over/under voltage protection.	LED
Display
Communication	RS232/RS485/BT
Cooling	Forced Air Cooling
Operating Temperature	Charging: 0℃~50℃ / Discharging: -15℃~60℃
Protection level	IP20
Storage Temperature	-15℃~45℃
Relative Humidity	5%~90%RH (Non-condensing)
Standard Parameters
Standard	EN-IEC 60335-1, EN-IEC 60335-2-29, IEC 62109-1, EN-IEC 62333

Compared to traditional high-frequency inverter systems, the Ironbull SSI series employs a power frequency transformer structure, a core design that is crucial for system stability. The power frequency transformer boasts stronger surge current withstand capability, maintaining stable output even during grid voltage fluctuations or the instantaneous startup of high-power equipment, and is less susceptible to impact. Especially when dealing with inductive loads such as compressors, motors, and pumps, the system's instantaneous current response is rapid, with no significant voltage drop, truly achieving "no voltage drop, no downtime" operation.

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The built-in isolation transformer design further enhances the system's safety level. It effectively eliminates DC components, suppresses common-mode noise, and reduces the risk of harmonic interference, resulting in cleaner and more stable output power. Simultaneously, this design enhances compatibility with auxiliary power sources such as diesel generators, ensuring stable and coordinated operation of the system in complex power supply environments. The transformer inherently possesses filtering capabilities, enabling the entire system to maintain clean power output even in environments with strong electromagnetic interference, significantly enhancing its anti-interference capabilities.

The Ironbull SSI series also excels in adaptability to extreme environments. Regardless of significant voltage and frequency fluctuations, high-temperature environments, or electromagnetic interference common in industrial settings, the system maintains stable and reliable operation. This stability stems not only from its structural design but also from ONESUN's deep technological expertise in cell selection, BMS management system optimization, and overall heat dissipation structure.

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In terms of capacity configuration, the Ironbull series offers 3kW/5kW/10kW power ranges, paired with 5kWh/10kWh/20kWh energy storage capacity combinations to meet diverse power needs. The modular architecture facilitates future capacity expansion, reserving room for user growth. The entire unit has passed multiple international certification standards, meeting global market access requirements for quality and safety.

As a professional OEM and ODM battery pack manufacturer, ONESUN not only provides standardized products but also offers in-depth customization based on customer market positioning, application scenarios, and brand needs. From exterior structural design and system parameter adjustments to communication protocol adaptation and branding and functional expansion, ONESUN provides one-stop solutions. Leveraging its mature production system and global project experience, the company continuously provides high-quality energy storage system products to customers in Europe, Africa, the Middle East, and Southeast Asia.

The Ironbull SSI series is not just a photovoltaic-energy storage system, but a reliable independent energy solution. Stability, power, and durability are its most genuine promises to users. ONESUN will continue to focus on technological innovation and quality manufacturing to provide global customers with more efficient, safe, and sustainable energy storage solutions.

Article Source: Lithium battery manufacturer - ONESUN China

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