This is the AIMS 1500 Watt Low Frequency Pure Sine Wave Power Inverter Charger with battery charger and Transfer Switch. It boasts a 4500 Watt Surge for 20 seconds. 
Features - 1500 watt low frequency inverter 
- 4500 watt surge for 20 seconds -3x surge capability 
- Battery Priority Selector 
- Terminal Block 
- GFCI 
- Marine Coated and Protected 
- Multi Stage Smart charger 50 Amp 
- remote panel available 
- auto gen start 
- auto frequency 
- 10msec typical transfer time 
- optional 25W power save mode 
- 7 battery type settings for charger 
-  Product Manual | Download
Specifications Inverter Output Specifications
- Continuous Output Power: 1500 Watts 
- Surge Rating:4500 Watts (20 Seconds) 
- Output Waveform: Pure Sine/Same as input (Bypass Mode) 
- Output Voltage 100-110-120Vac
- Nominal Efficiency: >88% (Peak) 
- Line Mode Efficiency: >95% 
- Output Frequency: 50Hz +/- 0.3Hz / 60Hz +/- 0.3Hz 
- Typical Transfer Time: 10ms (Max) 
- THD:< 10% DC 
Input Specifications- Nominal Input Voltage: 12.0Vdc 
- Minimum Start Voltage: 10.0Vdc 
- Low Battery Alarm: 10.5Vdc-11.0Vdc 
- Low battery Trip: 10.0Vdc-10.5Vdc 
- High Voltage Alarm: 16.0Vdc 
- Low battery Voltage Restart: 15.5Vdc 
- Idle Consumption: 4 amps DC
- Power Saver Mode Idle Consumption: <1.7 amps DC
Charger Specifications- Output voltage: Depends on battery Type 
- Charger Rate: 50A 
Dimensions- Unit Weight: 33 lbs. 
- Unit Size L x W x H: 23.54 x 8.59 x 7.05 inches 
- Shipping Weight: 42 lbs. 
- Shipping L x W x H 29.13 x 12.40 x 11.81 inches