stw14@stwpower.com 
Generally speaking, the battery powered generator has both AC output and DC output functions. For the AC output function, the DC power is converted to AC output by an inverter. You can decide whether to output 220v, 110v or 100v according to the mains voltage standard of different countries.
The dc output function can output conventional 48v, 24v, 19v, 12v or 5v through a dcdc converter.
There are many parameters of battery powered generator, but general users need to pay attention to the following points:
1. Power. The greater the power, the more electronic devices can be powered, and the richer the content of outdoor activities. For example, the power of the car refrigerator is 150w. If you want to drive the car refrigerator, the output power of the battery powered generator cannot be lower than 150w. The output power of battery powered generator is generally 250w, 500w, 600w, 1000w, 1100w, 1800w, 2200w, etc. At present, the mainstream output power in the market is about 500w, but there is a trend of large output power.
2. Check the battery capacity. The larger the capacity, the longer the power supply time.
3. Look at the type and number of power supply ports. The domestic battery powered generator has been fully equipped with 220v AC output. The ac port supports most electronic devices such as sockets; the usb port and the type-c port support fast charging. Now most of them can support PD and QC fast charging, which can improve the charging efficiency of mobile devices; some battery powered generators also support on-board charging output; in addition, the charging interface also needs attention.
4. Look at the charging efficiency. The mainstream battery powered generator can charge itself with sockets, car chargers, and solar panels.
See attached features. For example, some battery powered generator have LED lights, some can be monitored in real time through the app, remote control switches, and some support wireless charging.