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500W Modified Sine Wave Inverter with US Sockets and 4 USB Ports — Congsin

500W Modified Sine Wave Inverter with US Sockets and 4 USB Ports — Off Grid Inverter by Congsin

Compact Power for Off-Grid Living

The Congsin 500W modified sine wave inverter with US Sockets and 4 USB ports LCD display Off Grid Inverter delivers reliable DC→AC conversion for mobile and off-grid applications. Designed to power essentials — laptops, small appliances, LED lighting and charging devices via four USB ports — this 500W inverter balances efficiency and affordability for RVs, trucks, boats and tiny homes.

Key Features & Intelligent Display

Featuring multiple US outlets, 4 USB ports and a clear LCD display, the inverter provides real-time status on input voltage, output load and fault codes. Modified sine wave output ensures stable performance for most electronics while built-in protections (overload, short-circuit, over-temperature and low-voltage shutdown) protect connected devices and the inverter itself.

Durability, Certification & Quality Assurance

Manufactured by Guangzhou Congsin Electronic Technology Co., Ltd., founded in 1998, this model is produced on automated lines and tested with multifunctional equipment to meet ISO9001 standards. Many Congsin products hold CE, EMC, LVD, ETL, FCC and RoHS approvals — demonstrating a commitment to safety and international compliance.

Applications & Ideal Use Cases

Perfect for off-grid homes, outdoor offices, patrol and field work, and vehicle installations, the inverter supports daily essentials and emergency power. Its compact footprint and multiple charging options make it a go-to Off Grid Inverter for users seeking dependable, portable power solutions.

Why Choose Congsin — Innovation & Support

With 27+ years of focused experience in power inverters, portable power stations and solar controllers, Congsin offers OEM/ODM, private labeling and custom configurations. The brand blends patented innovations with global distribution and after-sales support to ensure energy independence for customers worldwide.

Buy with Confidence

Choose the Congsin 500W modified sine wave inverter with US Sockets and 4 USB ports LCD display Off Grid Inverter for a trusted, certified and affordable energy solution. Contact our sales team for specifications, bulk pricing, and customization options.

500W modified sine wave inverter with US Sockets and 4 USB ports LCD display Off Grid Inverter Display

FAQ:
What capacity battery is needed to meet long-term use?

It needs to be calculated according to the total power of the device, the formula is "Battery Capacity (Ah) = Total Device Power (W) × Usage Time (h) ÷ Input Voltage (12V)". For example, to drive a 1000W device for 5 hours, the required battery capacity = 1000×5÷12≈417Ah, it is recommended to use 2 200Ah batteries in parallel (total capacity 400Ah, actual usage about 4.8 hours).

Can 4 USB ports charge 4 mobile phones at the same time?

 Yes, the total current of 6.8A can support simultaneous fast charging of multiple devices, and the charging efficiency is guaranteed.

Is the cooling fan noisy during operation?

The noise is low (≤45 decibels, equivalent to normal conversation volume). The fan uses a silent motor and automatically adjusts the speed according to the device temperature (low-speed operation when temperature <40℃, high-speed operation when >60℃), balancing heat dissipation and noise.

Is the dual input automatically recognized or manually switched?

Automatically recognize DC12V/24V input, no manual switching required.

What happens if the positive and negative poles are reversed when connecting the battery?

The device features built-in reverse polarity protection. If the positive and negative terminals are connected incorrectly, the circuit will automatically disconnect to prevent damage to the equipment. Simply adjust the battery clip connections (red clip to positive terminal, black clip to negative terminal), then restore power to resume normal operation.

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Provide your project details and requirements, and Congsin will deliver customized inverter, portable power, or solar controller solutions with full technical support.

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