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
Congsin Red Shell 300W car inverter with two USB ports converts 12V to 110V efficiently. This 300W mini inverter 12V battery clip for camping ensures portable power for devices. Compact, durable, and reliable for travel, it’s the perfect DC to AC solution for your vehicle and outdoor needs.
Congsin's Portable 150W Modified Sine Wave Inverter powers your journey! This versatile Car Power Inverter with USB acts as a reliable 12V to 220V converter, ensuring an essential off-grid power supply. With dual USB ports and a universal socket, enjoy convenient power on the go.
Congsin 500W 12V to 220V inverter delivers reliable off-grid power with its modified sine wave design. This portable 500W DC to AC power inverter efficiently converts 12V DC to 220V AC, ideal for outdoor and emergency use. Trust Congsin for stable, portable energy solutions.
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 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 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.
◼ Latest Updates
The Latest News of Congsin
Stay updated with the latest developments, product launches, and industry insights from Congsin.
Explore the definitive guide to selecting pure sine wave inverters for off-grid, mobile, and backup power systems. This comprehensive resource covers continuous and surge power sizing, 12V/24V/48V battery integration, THD validation, and safety compliance. Designed for distributors and integrators, it features an OEM procurement checklist to evaluate manufacturing readiness, supported by CONGSIN’s expert engineering.
Explore the definitive architecture of residential bidirectional inverters, including inverter-chargers and hybrid models. This B2B guide explains AC battery charging, DC-to-AC household backup, solar integration, and 12V/24V/48V system selection. Designed for distributors and system integrators, it features a comprehensive OEM procurement checklist to evaluate transfer behavior, thermal protection, and manufacturing readiness for home energy solutions.
Explore the engineering architecture of V2G bidirectional inverters for mobile energy storage. This B2B guide covers onboard versus offboard power conversion, ISO 15118 and OCPP communication, grid interconnection compliance, and thermal validation. Discover a comprehensive evaluation checklist for OEM procurement to verify topology, grid protection, and manufacturing readiness for your next vehicle-to-grid project.
Explore the component architecture of high-frequency bidirectional inverters. This engineering guide helps buyers evaluate isolated ferrite transformers, SiC MOSFET trade-offs, thermal validation, and EMI control. Discover a comprehensive OEM procurement checklist to verify topology and manufacturing readiness, supported by CONGSIN's 27 years of power-conversion manufacturing experience.
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
Can 4 USB ports fast charge at the same time?
Yes, 4 USB ports can fast charge mobile phones, tablets and other devices at the same time, meeting the needs of simultaneous charging of multiple devices.
What is the working principle of the UPS function?
When the external power supply is normal, the inverter powers the device and charges the battery; when the external power supply is interrupted, it automatically switches to battery power to ensure uninterrupted operation of the device.
Can it be connected to a battery long-term?
Yes, ensure good ventilation to avoid overheating.
Can this inverter run a refrigerator or power tools?
Recommended load ≤80% of rated power. For inductive loads, use a pure sine wave model.
Which plug types are supported by the universal socket?
The universal socket is compatible with most national plug specifications, such as GB, US, EU, etc., and can meet the use of devices in different regions (some require adapters).
Get in Touch With Congsin
You can also communicate with us directly through our online contact form. Please fill in the following information, and our team will contact you as soon as possible after receiving your message.
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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