Toller wrote:

With a dead inverter generator, would it be possible to pull the inverter
out and use it? A large sine wave inverter has good value. Or would the
circuitry be so emeshed as to make it impractical?

Highly unlikely to be of any value separate from the rest of the
generator system. Those inverters do not take a 12VDC input like a
typical standalone inverter. Consider it a source of spare parts for a
matching unit. If you don't have a matching unit ebay it for a few
bucks.