SPECIFICATIONS

Battery Voltage Range: 48V-51.2V

Brand Name: grandtech

Certificate: UL1741&IEEE1547.1-2020,CEC,RULE21,HECO,FCC15classB,RoHs

Cooling: Air Cooling

Display: LCD+LED Display

Frequency: 50/60 IHZ

Input Voltage: 125~450Vdc

Inverter Efficiency: 99.9%

Keyword: Hybrid Solar Panel Inverter

Model Number: SEI-12K-UP

OEM: Accept OEM

Output Current: 200A

Output Frequency: 50/60Hz

Output Type: Dual,Multiple,Split,Single

Output Voltage: 120/240Vac

Phase: 120V/240V Split Phase

Place of Origin: Guangdong, China

Product name: Hybrid Solar Inverter

Size: 750*440*240mm

Type: ac-dc-ac,DC/DC Converters,AC to AC,DC/AC Inverters

Warranty: 5 Years

Weight: 42kg(92.59Ib)

Products Description

The SEI Series 48V Solar Storage Inverter is a high-performance, all-in-one hybrid inverter designed specifically for the US residential and light commercial market. It delivers reliable 120/240V split-phase power, seamless battery integration, and full compliance with US grid standards, making it ideal for both grid-tied and off-grid energy systems

Specification

MODEL	SEI-8K-UP	SEI-10K-UP	SEI-12K-UP	Can Be Set
INVERTER OUTPUT
Rated Output Power	8,800W	10,000W	12,000W
Max.Peak Power	17,600VA	20,000VA	24,000VA
Rated Output Voltage	120/240Vac,single-phase/split-phase /three-phase(parall)					√
Load Capacity of Motors	5HP	6HP
Rated AC Frequency	50/60Hz
BATTERY
Battery Type	Lead-acid/Li-ion/User-defned					√
Rated Battery Voltage	48V
Max.PV Charging Current	200A					√
Max.Mains Charging Current	120A					√
Max.Alternator Charging Current	60A
Max.Hybrid Charging Current	200A					√
PV INPUT
Num.of MPPT	2
Max.PV Array Power	5,500W+5,500W			6,600W+6,600W
Max.Input Current	25A+25A
Max.Open-circuit Voltage	550Vdc+550Vdc
MPPTOperating Voltage Range	125~450Vdc
MAINS/GENERATOR INPUT
Input Voltage Range	90~140Vac					√
Frequency Range	50/60Hz
GENERAL
Num.of Parallel	1~6 units
Dimensions	750*440*240mm(2.46*1.44*0.79ft)
Weight	42kg (92.591b)
Protection Degree	IP65
Operating Temperature Range	-25-60℃,>45℃ derated
Cooling Method	Intelligent air-cooling
Warranty	5 years
COMMUNICATION
Embedded Interfaces	RS485/CAN/USB/Dry contact					√
External Modules(optional)	Wi-Fi/GPRS					√
CERTIFICATION
UL1741&IEEE1547.1-2020,CEC,RULE21,HECO,FCC15classB,RoHs

Details Images

US-Ready Design – Native 120/240Vac split-phase output for American homes
High Power Density – 8kW / 10kW / 12kW rated output with strong surge capability
Flexible Energy Storage – Compatible with lithium-ion and lead-acid batteries
Scalable System – Parallel up to 6 units for future expansion
Outdoor-Ready Reliability – IP65 protection for harsh environments

Company Profile

SICHUAN GRANDTECH NEW ENERGY TECHNOLOGY CO. LTD. is a professional supplier of solar energy storage industry. We are engaged in manufacturing and marketing of solar inverter and storage energy battery. Through vast experience, we established a list of certified manufacturers that have all the relevant ICE, UL, ISO and other certifications required as well as proven commitment to quality. Supplying high quality products is the foundation of our company. Our plant has a strict quality control system and is equipped with state-of-the-art process and production facilities.

All of our efforts during manufacturing are aimed at provided the Customer with the peace of mind that when the equipment arrives on location, it is ready to go to work, and it will perform reliably. We strive to provide our clients with high quality products, good service, timely delivery and competitive prices and look forward to cooperating with you.

FAQ

1.Will this inverter work with my US home electrical system?
Yes. The SEI Series is built specifically for the US market and supports 120/240V split-phase output, ensuring seamless compatibility with standard American residential systems.
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2.Is this inverter approved for grid connection in the US?
Yes. It is fully compliant with UL1741, IEEE 1547.1-2020, CEC, Rule 21, HECO, and FCC Class B, meeting the interconnection requirements of most US utilities.
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3.Can I use my preferred lithium battery brand?
Absolutely. The inverter supports 48V lithium-ion, lead-acid, and user-defined batteries, with CAN/RS485 BMS communication for smooth integration with mainstream battery brands.
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4.Is the system scalable if my energy needs grow?
Yes. You can connect up to 6 units in parallel, allowing you to expand system capacity without replacing your existing inverter.
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5.Can the inverter power high-load appliances or motors?
Yes. The SEI Series delivers high peak power and supports motor loads up to 5–6HP, making it suitable for air conditioners, pumps,and other heavy-duty appliances.
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6.What happens when solar power is insufficient?
The inverter supports grid and generator charging, with a hybrid charging current of up to 200A, ensuring uninterrupted power even during low solar production or outages.
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7.Is this inverter reliable for outdoor installation?
Yes. With an IP65 rating, industrial-grade design, and a wide operating temperature range, it is built for long-term outdoor and harsh-environment use.
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8.Is this inverter suitable for residential or commercial projects?
Both. It is widely used in residential homes, farms, telecom sites, islands, and hybrid/off-grid projects, making it a versatile and proven solution.