Up to 90%, but it still doesn't say how many wattage that represents.
I can easily cut up to 90% of my bill as well without solar power.
I can turn off the tv, eat cold food, take cold showers, learn to function in the dark, and other energy saving methods. But that doesn't mean that I've found new ways to generate power, just cut back.
As you notice, the guy even admits that one cannot seriously expect to recoup the costs of the installment.
So, how much wattage can your company provide for $20 grand?