EF-1500 add-on demand collection

1.How many EF-1500 units do you plan to purchase?(Required.)
2.Where are you located in?(Required.)
3.What is the maximum capacity of portable power stations do you need?(Required.)
Capacity options
To support your current use
Capacity you wish to have
4.What is your thought on the concept of Extra Battery?

Do you prefer to have one power station unit with a larger capacity, or one smaller power station unit with option to add extra battery module?

Let us know your choice and reason for your preference.