ZDNET’s key takeaways The EcoFlow Delta Pro Ultra battery and inverter unit is available now for $6,299 while the Smart Home Panel 2 is available for $1,899. The single unit has a 6kWh capacity and supports a 7,200W output and 5.6kW solar input, allowing it to run an entire home, especially when stacked with other units for increased capacity. The Delta Pro Ultra is a decidedly expensive solution for a home backup system, and though portable, its hefty weight could affect portability. View...