50W 18V Solar Panel Kit with Built-in 12V PWM Charge Controller 23% High Efficiency Monocrystalline Solar Panel Ideal for Rooftop RV Trailer Camper Marine Home Farm Off-Grid 12BB N-Type Solar Cells

Outstanding Performance of N-type Solar Cells: Low temperature coefficient: The power temperature coefficient of n-type modules is -0.29%/ degree Celsius, which is lower than that of p-type cells at 0.35%/degree Celsius. This means that n-type modules are less affected by temperature and can maintain high power generation efficiency‌ at different temperatures. High bifaciality‌: The bifaciality of N-type cells such as TOPCon can reach 85%, which is superior to the 70% of P-type cells such as PERC. This makes the N-type battery perform better in bifacial power generation and can generate electricity using more light ‌. Low attenuation: The attenuation of N-type solar cells is even lower. The attenuation in the first year is ≤1%, and from the second year onwards, it is ≤0.4%. This means that their long-term power generation is more stable and the power generation throughout their entire life cycle is higher. High reliability: N-type solar cells perform exceptionally well in terms of mechanical strength and UV resistance. Its structure is symmetrical and the stress distribution is uniform, which can better disperse mechanical loads and reduce the risk of local stress concentration. Meanwhile, the front-back contact structure enhances the battery surface's resistance to ultraviolet rays and slows down the degradation rate of the passivation layer. 50W Mono Solar Panel Specifications: Rated Power：50W Solar Cell：Monocrystalline Max. Voltage(Vmp)：18V Open Circuit Voltage(Voc)：21.6 V Short Circuit Current：3.06A Max. Current：2.78A Frame：Aluminum alloy frame Length of Extension Cable：300cm(9.8ft),0.75mm(18AWG) Solar Panel Weight：1.6kg (3.5lb) Size：570x470x17mm(22.44x18.5x0.67 in) Controller：Yes Mount Bracket：No Package Included: 1*50W Solar Panel with Built-in PWM Charge Controller 1*Solar Cables(O-ring Cable) 1*Solar Cables(Alligator Clip) 1* English Instruction Manual

• Compatible with 12V Battery Charging or Maintenance: This solar panel is designed for charging and maintaining 12V rechargeable batteries, including LifePO4, lithium-ion, AGM, SLA, GEL, EFB, and MF. It can power RVs, cars, boats, trailers, tractors, trucks, motorcycles, lawn mowers, water pumps, door openers, electric fences, street lamps and more to extend battery life. Under ample sunlight conditions it generates up to 180Wh of electricity and enters maintenance mode when fully charged.(Note: Our solar panels have been rear-mounted controller and cannot charge mobile power stations that already have built-in controller.)
• 12V Ultra Smart PWM Technology Charging Controller: Featuring advanced ultra-intelligent PWM technology (maximum power point tracking), this algorithm optimizes sunlight conversion with a tracking efficiency of up to 99% and peak conversion efficiency reaching 98%, which is about 20%-30% higher than similar brands.
• 23% High Efficiency: Made from high-efficiency monocrystalline silicon and A+ class N-type module cells that are minimally affected by temperature fluctuations. It excels in bifacial power generation even on cloudy days. By tilting the panels towards the sun efficiency can reach up to 24%. The design includes a 12BB power grid line for lower attenuation and only a 0.5% annual degradation rate ensuring a lifespan of up to 25 years.
• Maintenance-free: The solar trickle charger automatically stops charging when the battery is full and resumes when it discharges, requiring no maintenance. It is a fully automatic 12-volt solar charger.
• Multi-layer Sturdy Protective Material: The solar panel features durable low-iron tempered glass, transparent EVA film, N-type monocrystalline silicon cells, waterproof backing, and anti-corrosion aluminum frame for 100% water and rust resistance. It operates reliably in extreme temperatures from -40℉ to 185℉ and withstands strong winds (2400Pa), hail, snow loads (5400Pa), sandstorms, thunderstorms, blizzards, and other severe weather conditions.
• Visible Battery Capacity and 3 Types: A PWM intelligent charging controller at the back of the 50W solar panel displays battery capacity (25%, 50%, 75%, 100%) and type (GEL/AGM/lithium) via LED indicators for easy monitoring.
• Built-in Protections: The rear controller is user-friendly with various internal protections against reverse connection, overvoltage, overcharge, overdischarge, overcurrent, overload, short circuit, reverse polarity, overheating, water damage, and sparks—ensuring comprehensive battery safety.
• Widely Applied: The versatile 50W solar panels are ideal for various off-grid applications including roofs, RVs, camping setups, mowers, motorcycles, solar stations, monitors, tractors, yachts, street lamps, trailers, ATVs, home, tents, cars, pumps, electric fences, door openers, etc.
• Quality Service: We provide 12 months replacement and warranty after-sales service. If you have any questions, please feel free to find us, we will do our best to solve your problems.