Dear Al:-
Our project have 50 kWp Grid connected solar panel system with out battery back up. the project is individual and the solar panel is only for this factory alone
the factory operate 240 days per year but we get energy from solar panel for 365 days so we connect our solar power to Govt Electric grid so the energy from solar is sent to govt via electric grid (with sub Electricity meter) when the factory not operating, then electricity bill generated automatically subtract the electrical energy get from factory solar panel
Now the issue is
How much electricity cost we count towards renewable energy cost options are (the solar panel supplier gives the annual electricity production by 50kWp solar panel)
1.Entire electricity produced by solar panel In year
2.Electricity produced in factory operating time (240 days)
Francesco Passerini
engineer90 thumbs up
March 16, 2016 - 8:49 am
Reference Guide, p. 291: "Renewable energy produced on-site and then sold to the grid is not eligible"
The best solution is a calculation step of one hour or less.
Regards
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
March 16, 2016 - 12:37 pm
The answer is #1. You can count all of the renewable power generated by the system. What you are describing is simply net metering and does not violate the statement Francesco mentions. That RG citation only applies to systems that are set up to exclusively sell power to the grid and nothing is used by the LEED project.
Francesco Passerini
engineer90 thumbs up
March 17, 2016 - 6:28 am
Sorry, Marcus, I have always a lot of questions... but, how do you know that the citation applies only to systems that are set up exclusively sell power to the grid? I have read the following statement: "if a project building uses
photovoltaic panels to generate electricity on-site but does not store energy when output exceeds demand or use net metering, only the portion of renewable electricity actually consumed on-site counts." but it isn't so clear like your statements, Marcus.
Does an offical interpretation exist?
SAMY Chamy
EnginneerT&T Green
12 thumbs up
March 18, 2016 - 12:48 am
Thank you Marcus
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
March 22, 2016 - 11:15 am
Let me try to explain. The issue is not which side of the meter the power feeds into. The issue is related to the agreements in place. From the original post it sounded like the factory has an agreement with the PV provider and/or the utility. The factory uses the PV power when open and the excess flows to the grid when it is not open. This is essentially a net metering arrangement. So I am assuming that is the case in my reply above.
The other key component which must be in place to count this renewable energy for the project is that the building owner must retain the RECs associated with the PV power. Even if there is not a REC market in Vietnam this issue must be documented to prove that no other entity has a claim on the RECs.
When you read the entire paragraph you are pulling sentences out of it basically says that the project must use some or all of the power generated in order to be eligible. If all the power feeds to the grid you can't count it. The first sentence says you can send some to the grid. The example allows for net metering. The way the documentation is submitted is that you provide the PV system calculation results for the amount generated by the system You are not required to indicate how much goes to the grid versus what is used in the building, only the total kWh produced.