As part of your Proposal, you will be required to represent that: “A revenue quality meter has been or will be installed to measure the output of the system, compliant with the determination made by the Illinois Power Agency in its document “Revenue-Quality Metering Accuracy Standard and Acceptable Technologies”. The relevant document is posted here: https://www.illinois.gov/sites/ipa/Documents/IPA-metering-accuracy-standard-5-14-15.pdf.
For systems 25 kW and above registered with GATS, the requirement is that such systems utilize a meter that meets ANSI C.12 standards. For systems 25 kW and above registered with M‐RETS, the requirement is that such systems utilize an ANSI C.12 certified revenue quality meter, as may be further specified by the M-RETS operating procedures. The standard is not stated solely in terms of accuracy and does not state that all meters accurate to plus or minus 5% are acceptable. It is the responsibility of the bidder to ensure that any system presented satisfies the applicable metering standards so that the bidder can make all representations of the Proposal.