1.90W solar panel system 2.Compact 2 x 45W ... 9kg Solar battery charger, 90W solar panel energy systemItem No. SP90WApplications:portable power supply, desalination systems, water pumping ... exploration, suevery and mining Features:* Multiple use: a portable power source for sampers, hikers, boaters and others ... 50AH battery (optional) which can provide stable energy for most of 12V devices by female socket ...