4 in 1 Solar Panel Connection Adapter Kit This comprehensive kit includes all necessary adapters for solar charging, compatible with DC5521 and DC7909 connectors, making it a solution for your solar energy needs. High Efficiency Charging Cable Constructed with an oxygen-free copper wire core, this cable minimizes resistance with a stable power supply and improves the performance of your devices during solar charging. Optimal Insulation Material The connectors are made of an insulating material that provides excellent protection against extreme temperatures, fire and UV rays, ensuring durability and reliability in different environments. MULTIPLE DEVICE COMPATIBILITY Designed for use with various stations and solar panels under 140W18V or 280W36V, this adapter kit is suitable for users of Powkey, SinKeu, Enginstar, Marbero, River/series products. Use scenarios - Off grid camping or remote work: Pair a portable solar panel up to 140W18V or 280W36V with a Powkey, SinKeu, Enginstar, Marbero or River/series power station to charge batteries and run essential devices with a stable, low-resistance connection. - Emergency preparedness: During power outages, rely on the insulated connectors and versatile adapters to keep essential devices powered reliably and safely. - RV or vanlife outdoor activities: Maintain battery levels on the go by using the kit with compatible solar panels and power stations to support multiple devices and longer trips.