Ebay offers MaXpeedingrods 4KW Gas / LPG Portable Generator for $789.99 (reg $1316.65) with free shipping.

Product Description:

Perfect for outdoor camping, outdoor party, garden courtyard, outdoor wedding, RV travel, and other outdoor recreational activities, emergency EV-Charging as well as for emergency use of family power failure in extreme weather, etc.

• Smart Control & Monitor: Once connected via Bluetooth, the APP can start and stop the generator; After starting up the generator, the app can on and off generator' ECO mode, and the app can display voltage, frequency, real-time load power, remain gasoline, single running time, accumulated running time, generator status, etc.
• Dual fuel: Gasoline and LPG can be switched with one click. LPG has lower emission level and higher energy efficiency compared with gasoline.  No need to maintain as often as gasoline. Lower maintenance cost and more convenient.
• 3 ways of easy start: Electric Start, App Start and Recoil Start. 
• Provide clean power: Inverter technology generates pure sine waves to provide safe, high-quality power for sensitive devices without affecting their useful life. Can directly charge phones, laptops, cameras and other digital devices.
• Safety: The generator keeps you in the know with a CO alert, engine oil alert, overload protection, and a whole lot more. All are clearly visible with indicators on the unit, and all can trigger an auto-shutdown to keep you and your generator safe.
• Multiple Outlets: 1x 120V 20 Amp Outlet, 1x 120V 30 Amp Outlet, 2x USB Outlets.