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CS-2009 EAc2:On-site Renewable Energy

Is EAc2 affected by the use of the ACP calculation for EAc1?

Working on a core & shell project that is planning to install a PV system sized to offset 1% of total building energy cost. Per the ACP calculation for EAc1, this 1% will be derated by the percent of building cost that is Owner-controlled. (see http://www.usgbc.org/redirect.php?DocumentID=10130). So in this case, the 1% system will only be worth 0.46% for EAc1. My question is whether for EAc2 (Renewable Energy), this system is only worth 0.46% as well, which means we don't meet the 1% / 4-point threshold. The ACP documentation only mentions EAc1, and does not mention EAc2. However, the documentation says: "* If the project includes site-generated renewable energy and is following this Alternative Compliance Path, the LEED form [EAp2] should show the site-generated renewable energy cost as equal to the total site-generated renewable energy cost x the Percent of Energy Cost Influenced or Directly Controlled by CS Owner/Developer". Since EAc2 is linked to EAp2, then the lower PV value will show up in the EAc2 Form. Thoughts?

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Thu, 03/26/2015 - 15:35

The EAc2 thresholds do not change with this ACP. You will need to be 1% of the total building energy cost to earn this credit.

Thu, 03/26/2015 - 19:01

Thanks for the quick response. So to clarify: if my building requires 10kW in order to offset 1% of annual Proposed costs, and if my developer controlled percentage is 50% per the ACP calc, then I can only claim the equivalent of 5kW for EAp2 and EAc1, but for EAc2 the 10kW system is not derated and will be worth 4 points for EAc2 (1% contribution). please let me know if this is correct! great presentation today by the way!

Thu, 03/26/2015 - 19:05

I think you got it! Thanks hope you got something to use.

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