Brad, you are correct- our system value is significantly lower: our estimated, average system value is around $15,000 (due to savings in the raw materials, manufacturing, system architecture and design, etc...).

The customer's electric bill will not actually be lowered- it simply will not got much higher than it is today over the course of the contract: a small portion of the customer's electricity will/may still come from the grid, so there is some future increase there. Our rate will not change over the course of the contract. The demonstrative Solar Savings Calculator is based on a hypothetical savings based on future rate increases by utilities. If it happens that electricity suddenly becomes cheaper, the homeowner could either renegotiate the contract for the lower rate or just have the system removed (either choice, at the expense of the security deposit). Cheaper electricity rates are unlikely. The state of Connecticut just allowed a 50% electric rate increase for this year alone!

The calculations are not "bad," but are hypothetical, based on the last 25 years' history of electric rates.