Walmart with EcoFlow Technology has the EcoFlow DELTA 1000 1600W 1008Wh Portable Power Station (100272038) on sale for $399 with free shipping. Roughly 39.6 cents per Wh. Ports include:

• 6 AC PURE SINE WAVE outlets (100V-120V 1600W 3100W Peak)
• 2 USB-C ports, 2 USB-A ports, 2 USB-A fast charge ports, 1 DC 13.6V port