Dear Sir/Madam,   We would like to introduce new product with MPPT solar charge controller.There are 30a 40a 60a with 12v/24v/48v, Details as following: Features:Small size more easy to carry.White appearance meet more customer's like.Small current with USB, new design with MPPT solar controller.Tracking efficiency reach more than 99%   If you have any inqury please feel free to contact us. Email:18926409646@189.cn Whatsapp/Cellphone/Wechat/Skype: +86 18926409646