Photovoltaics Changes

[nmerket]

• Need definition for AnnualOutput.
• Need definition for LevelizedCostOfElectricity.
• Need another set of eyes on PV ownership enumerations.

@RebHudson
Fixes #53
Fixed #54

[nmerket]

@Gavinhastings @RebHudson Do these enumerations for PVSystem/Ownership looks reasonable?

[RebHudson]

Those enumerations work for me

[nmerket]

From @RebHudson

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Annual Output could be “actual” or “projected”. These would need to be enumerations for the value. Actual would be a measured value of the full year’s energy output in kWh/year. It would be great to have a year associated with that value.
The projected value requires a calculation/estimation. Does this need to be a set calculation? I could see that different solar installers might use different formulas.

There is a simplified version of an output calculator:
http://pvwatts.nrel.gov/

For levelized cost of electricity, it also involves a calculation that could be done in different ways. A good definition from SAM (NREL created a SAM model that has a method for calculating LCOE https://www.nrel.gov/analysis/sam/help/html-php/index.html?mtf_lcoe.htm) is: The LCOE is the total cost of installing and operating a project expressed in dollars per kilowatt-hour of electricity generated by the system over its life.
Again – does this need a specific formula associated with it? Or can it be up to the contractor’s discretion?

http://www.nrel.gov/analysis/tech_lcoe.html seems to have a simpler version.

[nmerket]

I added the following definitions

AnnualOutput

[kWh] Projected Annual Output for a typical meterological year as determined by PVWatts.

I decided to go with the projected because that's what more people are likely to have. It's fairly simple to calculate too.

Levelized Cost of Electricity

[$] The LCOE is the total cost of installing and operating a project expressed in dollars per kilowatt-hour of electricity generated by the system over its life. Can be calculated with System Advisor Model or through a simplified calculation at http://www.nrel.gov/analysis/tech_lcoe.html.

[nmerket]

add "or similar"

[nmerket]

Review: @brandongallagher @GamalielL

[GamalielL]

Looks good to me. I've asked Andy to review as well.

[brandongallagher]

works for me. i'm looking forward to the AnnualOutput field. that will help us.