... certificates 5.pure sine wave output 2000w power inverter with charger EP3000 series inverter pure sine wave output1, rated power: 1000w ... adjustable3, DC voltage: 12V DC, 24V DC, 48V DC4, battery charger buit in: 35-70amp5, pure cooper transformer buit in: YES ... each time when power on or every 6 days.SOLAR CHARGER Rating voltage12V / 24V / 48V12V / 24V / 48VDC input range12V model : 12 ...