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Can I really double-count onsite renewable energy in both EAc2 and EAc1?

Our PV system is being installed after the building is occupied. Is that okay?

Our project will have a PV system onsite, but it will be installed, operated, and owned by a separate entity that is paying for the system through a premium price per kWh paid by the utility, per state regulations. Is there any way to count this toward th

A biofuel-based cogenerator is being used to produce both electricity and heat (CHP). Can I consider all the energy produced, or just the electricity?

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We have a PV array installed on our campus, under the same ownership, but not on the building or within the LEED project boundary. Can we count that toward EAc2?

Because of how our onsite PV system was financed through the utility, the project is selling the RECs associated with its solar energy production, even though we own the PV array and its power. Is there any way we can earn EAc2?

Can I pursue this credit if I am using one of the prescriptive compliance paths for EAp2/EAc1?

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NC-2009 EAc2:On-Site Renewable Energy

PV Watts for other countries?

Help Please! Our GBCI reviwer is asking us to: Provide screenshots or output calculations from a simulation program showing how the annual energy savings was determined for the photovoltaic system. They suggest using PV Watts, however PV Watts seems to be not usable for our project located in the Carribean as it says "No PV Watts data at mouseclick". Any suggestions? Is there another software we can use?

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Profile picture for user Nadav Malin
Nadav Malin
CEO
Green Commons, LLC
LEEDuser Expert
586 thumbs up

Fri, 08/26/2011 - 03:23

Whoever engineered the system must have some basis for estimating electricity output--it should be enough just to share their calculations. You'll want to to factor in climate data (solar insolation), orientation and slope of the panels, and their generation efficiency, as well as an estimate of losses in the balance of system components (such as DC to AC conversion). PVWatts has pretty sophisticated algorithms for doing this, but there are simpler estimates you can use. Check with a local engineer with solar experience if your provider can't do it.

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