... inverter feature:1),Stel inverter apply in car,marine,solar electric power/wind electric power,motive office,offer power to emergency ... work,outside work.2),Stel inverter Efficiency up to 90%,super surge ... compatible,no environmental protect,no maintenance,3.Stel power inverter specification details: SpecificationST-P300MAIN FUNCTIONPure sine wave output( ...