According to Eigenvector :

"John Gilmer" wrote in message
...

As another poster noted, the main panel breaker is sized to the drop from
the power company. IF the drop supports 200 amps then, yes, you might as
well spring for the larger panel. You never know when circumstances
might
cause your unit to draw over 100 amps.

How would you know if the drop was sized for 200A?

Ask the power company. But an electrician can probably give
a reliable answer.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.