Comprehensive 4000W Off-Grid Solar Panel Kit includes an 18W waterproof solar panel and a 30A charge controller, ideal for RVs and home backup power needs. High-efficiency 18W solar panel features monocrystalline cells with a conversion rate of up to 15%, ensuring maximum production for your off-grid applications. Durable construction with low-iron tempered glass and a erosion-resistant aluminum frame guarantees longevity and performance in harsh outdoor conditions. Versatile 30A solar charge controller includes dual 5V/2.1A ports for charging mobile devices while intelligently managing for prolonged life. Modified sine wave inverter provides 4000W peak power and 250W continuous power, perfect for powering your essential devices during outdoor adventures or emergencies., Manufacturer: ROTSRHUOY