Example:
15 metric horsepower-hour = 2.478936e+26 eV
1 metric horsepower-hour = 1.652624e+25 eV | 1 eV = 6.050983e-26 metric horsepower-hour
Conversion Steps:
15 × (2647795.5 / 1.602177e-19) = 2.478936e+26