PKW by peak kilowatt rating of the system.
 The cost of electricity purchased from the utility C$/KWH) was
estimated over a 40 year time period (1980-2020). This was also true
for the rates utilities are required to pay for electricity produced
and sold by dispersed systems. Since this price is tied to utility rates
via the buyback ratio, it is only necessary to discuss the estimation
of the former prices.
 The 1980 base price used in estimating future utility KWH rates is
$.03604/KWH. This rate is assumed to correspond to the off-peak KWH
charge for electricity. Estimation of KWH rates was accomplished using
the exponential function

 PB(t) = 0.03604*EXP(n(t-1)) t = 1,...,41 (B4)
where
 PB(t) = Estimated price per KWH of electricity in year t
 n = Annual (real) rate of escalation in utility KWH rates. As
with the system cost estimates, all future estimates of the utility KWH
rates are expressed in term of $1980.
 This appendix has presented the basic equations used to estimate
future photovoltaic system costs and electricity prices. The interface
of these equations with the user specified input variables and other
model components is depicted in the sample program contained in Appendix