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Your math on the house seems off by a factor of 4? But 30% utilization seems high, as that would be a $2k/mo electric bill at 20 cents/kWh.

Reframing what you're saying, that would be a connection fee that worked out to just under 12 cents per kWh used for the first year, which seems both somewhat reasonable but also probably not going to move the needle much on the large deployments?

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I guessed what the utilization factor for a house was, purposely going for a very high number to show that it wouldn't add too much to the house.

Note, In proposing a one time fee, on the capacity to generate power, not the energy.

Yes, but using the 30% utilization factor I get 200A * 240V * 30% = 14.4kW , meaning a $14400 connection fee rather than $3600 ? $3600 would be a 7.5% utilization factor.

And yes, I got the one time fee aspect. My point is that if you're basing this off of expected utilization (rather than say the size of the service regardless of how much energy is used), and that expected utilization is roughly correct, then that one time fee can be thought of as amortized cost per unit energy over a specified amount of time. And that cost isn't even that high if amortized over a year.

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