Our Service
◼ Design & R&D
Design & R&D Services
Congsin is a global manufacturer specializing in DC-to-AC power solutions, focusing on power inverters, battery energy storage systems, and solar controllers. Our products are widely used in outdoor camping, RVs, small home systems, emergency backup power, and commercial energ
Our capabilities include inverter topology design, thermal management engineering, EMC optimization, battery system compatibility, and firmware algorithm development. Through structured evaluation and rapid prototyping, we ensure every customized solution achieves optimal performance, reliability, and compliance with international standards.
◼ OEM/ODM Customization
OEM & ODM Services
Guangzhou Congxin Electronics Technology Co., Ltd. offers comprehensive OEM and ODM services, catering to diverse customer needs with customized power supply solutions. Leveraging advanced research and development capabilities, state-of-the-art production facilities, and stringent quality management, we collaborate closely with clients to design, develop, and manufacture tailored products.
Our expertise in vehicle inverters, solar controllers, battery chargers, and step-down converters enables us to provide innovative, high-quality, and environmentally friendly solutions that meet international standards and specific market demands.
◼ Quality & Reliability Testing
Quality & Reliability Testing Services
At Congsin, quality assurance is integrated into every stage of development and production. With precision testing instruments and a multi-level verification system, we ensure each inverter meets strict performance, safety, and durability standards required for global markets.
Our testing covers electrical safety validation, efficiency assessment, environmental and thermal robustness, EMC/EMI testing, and long-duration reliability evaluation. By implementing rigorous quality control from material sourcing to final inspection, we guarantee stable performance under various load and environmental conditions, ensuring product reliability throughout its lifecycle.
◼ After-sales Support & System Optimization
Support & Optimization
At Congsin, We delivers comprehensive after-sales support and system optimization services to ensure long-term product performance and customer satisfaction. Our technical team provides 24/7 assistance, remote diagnostics, firmware updates, installation guidance, and compatibility checks for diverse application scenarios..
Through continuous optimization—covering conversion efficiency, cooling performance, load response, and intelligent protection—we help enhance system stability, reduce energy loss, and extend equipment lifespan. With proactive maintenance and upgrade solutions, we support customers in achieving reliable and sustainable operation across residential, commercial, and industrial environments.
◼ Why choose us
Congsin's Service Advantages
◼ Service Support
Congsin offers one-stop service support
We provide technical assistance for installation, operation, and maintenance of our power supply products, backed by extensive experience and adherence to international quality standards.
Design and R&D
We have a team of experienced engineers, with all products and software designed and developed in-house. We possess core technological advantages and can support a wide range of customized requirements.
ODM and Custom Inverter Solutions
Photovoltaic inverters undergo rigorous safety and performance testing, including overload protection, voltage detection, and temperature regulation, ensuring stable and reliable operation in diverse environments.
Test for Reliability and Safety
Calibration and Quality Control
All inverter parameters are calibrated to ensure output performance meets customer requirements. Products undergo aging tests and multiple production and factory inspections to guarantee high-quality delivery.
Support and Maintenance
We provide comprehensive after-sales technical support, offering rapid response for remote diagnostics or on-site commissioning to ensure the efficient operation of photovoltaic systems.
System Upgrades and Optimization
Beyond routine maintenance, we offer periodic system inspections and optimization services. By leveraging the latest technologies, we enhance system efficiency, reduce operational costs, and ensure inverters remain in peak condition.
◼ Hot Products
Explore our latest Power Supply products
Our CS1000DDBC 1000W modified sine wave inverter is a professional power conversion device that converts DC 12V from batteries into AC 220V electricity. It is designed with user convenience in mind, featuring an LED display for real-time status monitoring, multiple charging ports (3 USB, 1 Type-C, 1 DC 12V) and two universal sockets to power a wide range of devices simultaneously. Its compact size (250×95×55mm) and lightweight design (NW: 0.84kg) make it easy to carry, ideal for outdoor activities, emergency home use, and on-the-go power needs.
This 150W modified sine wave car inverter supports dual DC12V/24V input and AC220V output. It is equipped with a Type-C port, two 3.1A USB ports, and a national standard socket. It is compact and portable, providing stable AC power conversion in various scenarios such as in the car, meeting the power supply needs of mobile phones, tablets, small home appliances and other devices.
This 1000W modified sine wave inverter has UPS charging function, with DC12V input and AC220V output, and 600W rated power. Equipped with dual universal sockets, two USB ports, an LCD display, and a battery clip, it is professionally designed and has stable performance. It can provide stable AC power conversion and UPS emergency power supply for computers, small home appliances, electronic devices, etc. in home emergency, office, outdoor and other scenarios, meeting the needs of simultaneous power supply and emergency power supply for multiple devices.
This 300W modified sine wave inverter has DC12V input and AC220V output, with a rated power of 300W. Equipped with 4 USB ports, two universal sockets, an LCD display, as well as 1 cigarette lighter port and a battery clip, it is rich and practical in design. It can provide stable AC power conversion for mobile phones, tablets, small home appliances, vehicle-mounted devices, etc. in vehicle, outdoor, home emergency and other scenarios, meeting the diverse needs of simultaneous power supply for multiple devices.
This 500W modified sine wave inverter has a rated power of 360W, with DC12V input and AC220V output. Equipped with 4 USB ports (total current 6.8A), a universal socket, dual LED displays, a reverse protection function, and a battery clip, it is thoughtfully designed and has stable performance. It can provide stable AC power conversion for mobile phones, tablets, small home appliances and other devices in vehicle, outdoor, home and other scenarios, meeting your need for simultaneous power supply of multiple devices.
This 500W modified sine wave inverter has a rated power of 360W and a peak power of 720W, with DC12V input and AC220V output. Equipped with 1 USB port, universal socket, LED display, external fuse design, and battery clip, it has an exquisite appearance and stable performance. It can provide reliable AC power conversion for mobile phones, small home appliances, electronic devices, etc. in scenarios such as vehicle, outdoor, and home emergency, meeting the power needs of various devices.
This 2000W full-power modified sine wave inverter is a patented model of our factory, with DC12V input and AC220V output. Equipped with an LED display, three AC output sockets, four USB ports, and independent control switches for DC and AC, it can provide stable power conversion for high-power devices and various electronic devices in multiple scenarios, meeting the power needs of home emergencies, outdoor operations, small commercial equipment and other scenarios.
This 1500W pure sine wave inverter converts DC 12V to AC 220V power, with a rated power of 1500W and a peak power of 3000W. Equipped with dual fans, LCD display, QC3.0 and PD Type-C fast charging ports, and remote control capability for stable and intelligent power output.
This pure sine wave inverter (Model: CS3000PSW-L6000) features "3000W full continuous power output + labeled 6000W peak power." Adopting pure sine wave output technology (waveform distortion rate <2%), its power quality is close to mains power, which can safely drive high-power precision devices such as air conditioners, refrigerators, electric tools, and medical instruments, avoiding equipment malfunctions caused by unstable waveforms. The device supports DC 12V input (compatible with 10.5V-14.8V wide voltage): 3000W continuous power meets long-term stable power supply, and 6000W peak power easily copes with the instantaneous startup impact of devices. Equipped with 4 AC universal sockets (16A) and 2 USB 3.0 fast-charging ports (22.5W/port), it can supply power to 6 devices simultaneously. Built-in six-fold protection (overload, overvoltage, undervoltage, short circuit, overtemperature, and reverse connection), combined with dual intelligent silent cooling fans (noise ≤45dB), balances high-power performance and safety, making it suitable for home emergencies, outdoor engineering, vehicle-mounted power supplies, small commercial and other scenarios.
This 3000W full-power pure sine wave inverter (Model: CS3000PSW) adopts pure sine wave output technology (waveform distortion rate <2%), and the output power is highly consistent with mains power quality. It can safely drive high-power precision loads such as air conditioners, refrigerators, medical instruments, and small industrial equipment, avoiding equipment malfunctions or shortened service life caused by unstable waveforms. The device supports DC 12V input (compatible with 10.5V-14.8V wide voltage), continuously outputs 3000W full power, and has a peak power of 6000W, easily coping with the instantaneous startup impact of high-power devices; it is equipped with 4 AC universal sockets (max current 16A) + 2 USB 3.0 fast-charging ports (22.5W per port) to meet the simultaneous power supply needs of multiple devices. Built-in six-fold safety protection (overload, overvoltage, undervoltage, short circuit, overtemperature, reverse connection), combined with dual intelligent silent cooling fans (noise ≤45dB), it achieves the triple advantages of "high power + high safety + low noise," suitable for home emergency, outdoor engineering, vehicle-mounted power supply, small industrial scenarios and other fields.
This 2000W full-power pure sine wave inverter (Model: CS2000PSW-3S) adopts pure sine wave output technology (waveform distortion rate <3%), and the output power is close to mains power quality, which can safely drive precision electronic devices such as computers, inverter air conditioners, medical instruments, and audio equipment, avoiding equipment malfunctions or damage caused by unstable waveforms. The device supports DC 12V input (compatible with 10.5V-14.8V wide voltage), continuously outputs 2000W full power, and has a peak power of 4000W, easily meeting the instantaneous startup needs of high-power devices; it is core-equipped with 3 AC universal sockets (max current 16A), which can supply power to multiple home appliances or devices at the same time, and is matched with 2 USB 3.0 fast-charging ports (22.5W per port), balancing high-power supply and digital product charging. Built-in five-fold safety protection (overload, overvoltage, undervoltage, short circuit, and overtemperature), combined with dual silent cooling fans (noise ≤42dB), it achieves both safety and stability, suitable for home emergencies, outdoor operations, vehicle-mounted power supplies, small commercial and other scenarios.
This 1000W full-power pure sine wave inverter (Model: CS1000PSW) adopts pure sine wave output technology, with a stable waveform close to mains power, which can be safely adapted to precision electronic devices such as computers, projectors, medical instruments, and inverter home appliances to avoid device damage or malfunctions. The device supports DC 12V input (compatible with 10.8V-14.5V wide voltage), continuously outputs 1000W power, and has a peak power of 2000W, meeting the power needs of most household and small commercial devices. Equipped with 2 AC universal sockets, 2 USB 2.0 fast-charging ports (18W per port), built-in five-fold protection (overload, overvoltage, undervoltage, short circuit, overtemperature), and a silent cooling fan, it balances safety and portability, suitable for home emergencies, outdoor camping, vehicle-mounted power supplies, small office and other scenarios.
◼ Latest Updates
The Latest News of Congsin
Stay updated with the latest developments, product launches, and industry insights from Congsin.
This 2025 guide helps homeowners select the best solar panel system by evaluating N-Type TOPCon efficiency, smart energy management (SEMS), and Vehicle-to-Home (V2H) readiness. Learn to calculate real energy demand, compare top inverter brands, and maximize ROI with the 30% Federal Tax Credit.
A comprehensive 2026 buyer's guide for car power inverters. Discover why experts recommend Pure Sine Wave and GaN technology for safely powering laptops, Starlinks, and appliances on the road.
Frequently Asked Questions
Still have questions?
Delve into our list of frequently asked questions about stage effects equipment. Here, we address and clarify your top concerns.
Modified Sine Wave Inverters
How to install the battery terminal wire?
Connect the red terminal wire to the positive pole of the battery and the black terminal wire to the negative pole. Ensure the interface is firm and there is no short circuit when connecting.
Is the dual input automatically recognized or manually switched?
Automatically recognize DC12V/24V input, no manual switching required.
Pure Sine Wave Inverters
Can this inverter drive a 3P air conditioner and a refrigerator at the same time?
Yes. The rated power of a 3P air conditioner is about 2200W-2500W, and an ordinary double-door refrigerator is about 150W-300W, with a total power of about 2350W-2800W, which does not exceed the 3000W continuous power; and the peak 6000W can cope with the instantaneous startup impact of the air conditioner. When using, ensure the battery capacity is ≥200Ah (12V) to ensure battery life.
Can it drive a 3P air conditioner and an electric oven at the same time?
Total power needs to be calculated: the rated power of a 3P air conditioner is about 2200W-2500W, and the electric oven is about 1500W-2000W. The total power is 3700W-4500W, which exceeds the 3000W continuous power, so simultaneous use is not recommended; if used alone, the 6000W peak can meet the startup needs of both, and the battery capacity must be ≥200Ah (12V) when used alone.
Can the 3 AC sockets drive high-power devices at the same time?
Yes, but it is necessary to ensure that the total power of the 3 devices does not exceed 2000W (continuous power). For example, it can drive 1 1000W electric oven + 1 500W microwave + 1 400W printer at the same time (total power 1900W), avoiding total power overload to trigger the protection mechanism.
Get in Touch With Congsin
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CONGSIN is a trusted OEM factory for power inverters, solar charge controllers, and DC converters. Reliable solutions for global B2B buyers.
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