If you are looking for a high pure sine-wave inverter and high capacity charger, SunGoldPower low frequency inverter is your best choice. it is a combination of an inverter, battery charger and transfer switch into one complete system, This 24V dc to 120v ac inverter boasts a 300% surge capacity for 20 seconds to reliably support tools and equipment longer. the inverter charger is found on practically every RV, trailer, motorhome, truck camper and is a good solution for backup or GridPower solutions. This inverter requires 120VAC input and can provide 120VAC output power for the appliances, and it can output 50 or 60Hz via the SW4.