Wrenches,
We have been asked for a cost estimate for a grid-tied PV system sized
to offset the electrical consumption of a building that is still in the
design phase. The building in question will be a elementary/high school
for a small community in southern Colorado. The only information
available is that it will be ~20,000 square ft, and will be going for
LEED Gold certification. Heating will be either via a ground-source
heat pump or gas-fired boiler+solar thermal feeding radiant floors.
Obviously the final choice of those two options greatly affects
electrical consumption of the building, but that aside, how are people
dealing with this sort of estimate process?...ie: when the building
itself is still vaporware. Is there a reasonable way to come up with a
ballpark W/ft² value when one is dealing with a host of unknowns? Any
techniques you've used to deal with these extremely amorphous requests
for costs?
Thanks in advance for your input.
-Luke Christy
Luke Christy
NABCEP™ Certified PV Installer
Solar Gain Services, LLC
Center, CO
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