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NC-2009 EAc5:Measurement and Verification

illumination metering with a photovoltaic system?

A project illumination system is controlled by a photovoltaic system. This system has a rechargeable battery as its primary energysource and as an auxiliary source it utilizes grid power. Is necessary to individually measure the energy consumption of this system?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 01/22/2013 - 22:39

Very hard to say from the limited information provided. IPMVP does not require you to measure every energy use. Can the use be derived by other means, say subtraction? Is the use virtually inconsequential (less than 1% of total consumption)? Sounds like exterior lighting powered by a battery which is charged by photovoltaics and the system is controlled by a photocell? If so as a renewable energy source it should be measured. This does not means it needs to be metered. Can the usage be derived by other means?

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