How is the output-ratio set for new vehicle sales share constraints?

[Lance-bot]

Hi all,

I am trying to better understand the example discussed in this issue:

#174

In the heavy-duty EV market share constraint example, the following parameterization is used:

<period year="2045">
    <minicam-energy-input name="HDV-EV_New_Reg24-2045">
        <adjusted-coef year="2045">830</adjusted-coef>
        <price-unit-conversion>1.0e-3</price-unit-conversion>
    </minicam-energy-input>
    <res-secondary-output name="HDV-EV_New_Reg24-2045">
        <output-ratio>7.377622377622378E-7</output-ratio>
        <pMultiplier>1.0e6</pMultiplier>
    </res-secondary-output>
</period>
Could someone explain how the output-ratio value 7.377622377622378E-7 was derived?

How should I calculate the corresponding output-ratio for other vehicle classes or transportation modes when implementing similar EV / ZEV sales-share constraints?

Any guidance would be very helpful.

Thanks!