Solar Employees

So big business is feeling the cost of big energy prices. The solution (for 18th century outfits that have 20 acre parking lots purely for ensuring their employees get exersise):

You don't want to tear the tarmac up. So, along the edges, install connectors that hook into the companies power grid. Now, the employees that park there can soup up their cars to convert solar power into electricity and feed it into the grid - and, pay them a rate that's less than what the power companies charge. Childishly simple.