300W 500W Bidirectional Bare Board Inverter with PV MPPT Charging 3.2V LFP Battery For portable power station system

Product Description

Introducing the 300W Bidirectional Bare Board Inverter with PV MPPT Charging from JYINS — a high-performance PCB module engineered for large-capacity single-cell (3.3V LFP) portable power stations. This advanced inverter board integrates solar PV charging with built-in MPPT, grid (mains) charging, and DC-to-AC inversion into one compact module, enabling efficient energy conversion between solar panels, utility power, battery storage, and AC loads.

With a rated output of 300W at 230VAC pure sine wave, this board reliably powers IT equipment, electric tools, and household appliances — even in off-grid scenarios. The strong overload capacity ensures compatibility with non-linear loads and motor-starting applications, making it a versatile choice for a wide range of power needs.

One of the standout features of this product is the built-in UPS function, which ensures seamless grid-to-battery power switchover in just 20ms (typical). When grid power is available, the board charges the battery from AC input; if the grid fails, it instantly switches to inverter mode, keeping your devices running without interruption. This makes it ideal for home backup power, outdoor camping, and mobile energy applications.

The board also features a built-in MPPT solar charge controller with up to 200W charging power and 99%+ tracking efficiency, supporting PV input voltages from 12 to 55Vdc. This maximizes solar energy harvest and reduces dependency on grid power, contributing to a more sustainable and eco-friendly energy solution.

Equipped with comprehensive protection — including over-temperature, overload, over-voltage, under-voltage, and short-circuit protection — the board is built for safe and reliable operation in demanding environments. The full fiberglass double-sided PCB, combined with analog-digital hybrid control technology, ensures structural strength, corrosion resistance, and long-term durability. At just 200 x 170 x 33mm and 1kg, its high power density design is perfect for integration into portable power station enclosures.

Trust JYINS to deliver a reliable, high-performance inverter board that will help you power your portable energy storage products with confidence. With over 30 years of industry expertise and internationally recognized certifications (CE, TUV, ISO 9001, SAA, RoHS, FCC), we provide OEM/ODM solutions tailored to meet your specific requirements.

Key Features

300W Pure Sine Wave Output

Delivers clean 230VAC / 50-60Hz power with strong overload capacity. Compatible with sensitive electronics, motor loads, and non-linear devices — no load picking.

Built-in MPPT Solar Charging

Max 200W PV input with 99%+ MPPT tracking efficiency. Supports 12-55Vdc solar panels with up to 10A input current, maximizing solar energy harvest.

Bidirectional UPS Function

Seamless grid-to-battery switchover in 20ms (typical). Charges the battery from AC power and instantly switches to inverter mode during outages.

Multi-Layer Protection

Over-temperature, overload, over-voltage, under-voltage, and short-circuit protection. Safe for non-linear loads and motor-starting applications.

Ultra-Compact & Lightweight

Only 200x170x33mm and 1kg. High power density with fiberglass double-sided PCB — ideal for portable and home energy storage integration.

3.3V Single-Cell LFP Optimized

Designed for single-series LiFePO4 battery systems (2.8-3.65Vdc) with three-stage charging for extended battery life and 1kWh capacity.

Technical Specifications

Applications

Outdoor Camping

Power lights, fans, mini-fridges, and phones at remote campsites using solar-charged battery power.

Home Backup Power

UPS function ensures seamless power supply for routers, lighting, and small appliances during outages.

Power Tools

Strong overload capacity supports motor-starting loads like drills, saws, and air compressors.

IT Equipment

Pure sine wave output safely powers laptops, monitors, and networking gear without interference.

Solar Energy Storage

Built-in MPPT controller harvests solar energy efficiently for off-grid power stations.

Mobile & RV Power

Compact 1kg design fits easily into portable power cases for van life and mobile applications.

Interface Definitions

LED Status Indicator Guide

The board features 5 LED indicators: 4 green LEDs (25% / 50% / 75% / 100% battery level) and 1 red LED (fault indicator).

Core Technology

Analog + Digital Hybrid Control

The inverter adopts a combined analog and digital control technology, delivering stable and reliable performance with multi-layer hardware and software protection. The full fiberglass double-sided PCB panel, combined with large-span components, ensures structural strength and corrosion resistance — significantly improving environmental adaptability for demanding field conditions.

High Efficiency & Power Density

Advanced circuit design achieves low loss, low heat generation, and peak efficiency above 90%, saving battery power and extending discharge time. The high power density design occupies minimal space while maintaining a lightweight 1kg profile — perfect for mobile and home energy storage applications.

Dimensions & Weight

Main Board: 200 x 170 x 33 mm

Net Weight: 1 kg

PCB Type: Fiberglass double-sided

Package Contents

Safety & Usage Precautions

Important Safety Notes

• Do not place the product near heat sources, open flames, or heating furnaces during operation.
• Keep away from all liquids. Do not immerse in water or use in rain/damp environments.
• Avoid use in environments with strong static electricity or magnetic fields.
• Do not cause short circuits with wires or metal objects.
• Use only official JYINS parts and accessories for replacement.
• Strictly follow the specified operating temperature range. Excessive heat may cause fire or explosion; extreme cold severely reduces performance.
• Do not block the cooling fans or operate in unventilated or dusty spaces.
• Avoid impacts, drops, and severe vibration. Secure during transport.
• Store in a dry, ventilated place out of reach of children and pets.
• In humid environments (seaside, waterside), use with a moisture-proof bag to prevent water ingress.

Maintenance & Care

• Use and store within the specified temperature range, away from water, heat, and metal objects.
• Do not store long-term above 45°C or below -10°C.
• For extended battery life, recommended operating environment is 20°C to 30°C.
• If the battery is severely depleted and left idle for a long time, the product enters deep sleep mode. Charge the battery before resuming use.
• Clean interface dirt with a dry cloth only.

About JYINS

Since our founding in 1993, Hisolar (JYINS) has been at the forefront of clean energy innovation, delivering premium energy storage systems, inverters and solar solutions worldwide. Our internationally certified products (CE / TUV / ISO 9001 / SAA) empower homes, businesses and remote communities across 50+ countries with reliable, eco-friendly power solutions for residential, commercial and off-grid applications.

What sets us apart is our unwavering commitment to excellence. Through rigorous quality control systems and flexible OEM/ODM solutions, we transform cutting-edge technology into dependable energy products that deliver stable performance even in extreme operating conditions. Our dedicated R&D team continuously innovates to meet evolving market demands.

More than just a manufacturer, we’re a mission-driven partner in the global energy transition. For three decades, our “Green Energy, Efficient Future” philosophy has guided every innovation. From household systems to large-scale projects, we provide complete energy solutions while maintaining the highest standards of environmental responsibility — helping build a cleaner, more sustainable world for generations to come.

FAQ

Q1: Why you should choose us?

• More than 30 years electrical equipment factory experiences
• Professional R&D team and sales team
• Provide OEM/ODM services
• Qualified product and competitive price
• Delivery in time
• Sincerely services

Q2: How is your after-sale service?

• We provide 1-2 years warranty
• We will repair the PCB or provide new one

Q3: What kind of certification you have?

ISO9001, ISO14001, ISO45001, CE, SAA, RoHS, FCC and so on.

Q4: Delivery time?

Standard products could be delivered within 10 days.

Q5: Can I have a sample order?

Yes, we welcome sample order to test and check quality.

Q6: What type of battery is compatible with this inverter board?

This board is designed specifically for single-series LiFePO4 (LFP) battery systems with a voltage range of 2.8V to 3.65Vdc (rated 3.3V). It is not compatible with multi-cell series battery packs.

Q7: Can this board power motor-based appliances?

Yes. The pure sine wave output and strong overload capacity make it suitable for non-linear loads and motor-starting applications, including electric tools, small refrigerators, and household appliances.

Q8: What solar panel specifications are recommended?

Solar panels should have a voltage range of 12 to 55 Vdc and a maximum open-circuit voltage not exceeding 60 VDC. The MPPT controller supports a maximum input current of 10A and delivers up to 200W of charging power (when input exceeds 20V).

Zhejiang Jyins Electrical Co., Ltd. (JYINS / Hisolar) — 30+ years of expertise in power inverters, solar inverters, and portable power stations. Products certified by CE, TUV, ISO 9001, SAA, RoHS, FCC. Exported to 50+ countries worldwide.

Web: www.jyinsgroup.com  |  Email: [email protected]