【SunGoldPower 3000W DC 12V Pure Sine Wave Inverter】:This Pure Sine Wave Inverter is a combination of an inverter, battery charger and AC auto-transfer switch.GFCI socket ,low frequency,low Idle Current,BTS cable, LCD remote control. It’s easy to power your daily home electrical appliances or RV, camper, trailer, boat and so on. 【Multiple Characters】: 0-100% Adjustable charging current; 5 DIP Switch settings to set Utility/Battery priority, Low Battery Trip Volt, AC Input Range, O/P Frequency setting, Power saver setting; Automatic Generator Start (AGS); Automatic Transfer-switch between AC sources and battery sources. 【AC/Battery Priority】: SUNGOLDPOWER 3000 DC 12V watt inverter is designed with AC priority by default, when AC input is present, the battery will be charged first, and the inverter will transfer the input AC to power the load. the inverter can be easily customized to Battery priority via a DIP switch SW5. When you choose battery priority, the inverter will supply power from battery despite there's AC input, and it won't charge the battery until the battery voltage is low to low alarm voltage. 【Auto Gen Start】：the inverter can be customized to start up a generator when the battery voltage goes low.When the inverter goes to low battery alarm, it can send a signal to start a generator, and turn the generator off after battery charging is finished. The auto gen start feature will only work with generators designed to work with this feature. 【Reliable Inverter】: Multiple safety protections, including Over /low voltage protection, Over temperature protection,Over load protection. Capable of working with microwave ovens, water pumps, refrigerator etc. electrical appliance. Widely used for home, RV, Camper, trailer, boat, and so on.