Stealth mode isn’t the thing that draws big money. It’s the size of the investment (~ $100M), and they get there by successive iterations of match funding.
If you only ask for another $1M here and there, then those people with deep pockets wont take you seriously.
Produce an R&D and deployment plan and schedule that will bring the installed base to 1000 generators; then ask for the amount of money that will cut that time in half.
