<p> Energy Resource Economics</p><p>SMART INVERTER WORKING GROUP MEETING 1950.002 7/17/2014</p><p>Jamie's update  Comments due August 18th o Helpful comments will be procedural in nature. These are the type of comments requested. o Substantive comments will have specific change requests  At what date will the judge rule and start the next phase? o Unknown  Parties want confirmation that they have fulfilled their part of filing requirements o This is the case SIWG Communication Issues to Resolve after July 18 submittal  Resolutions of communications issues: o What communication issues do we need to agree on in the near future (a few months)? o What can we leave until later when the requirements are clearer? o What can we have as general agreement but allow exceptions? o What will never need agreement but left up to implementations? . Performance requirements will be implementation-driven  Coordination with other efforts: o Frances notes that we won't wait for other projects but that we should recognize that they exist SIWG phase 2 issues that need further discussion and resolution  Use cases o Frances sent out nearly 200 last week . Notes that this may have been overload o Frances asks how parties want to deal with or review o Parties ask if phase 2 functionality was mapped to Use Cases. . Yes o Parties note that though the use cases are useful, they don't see how they tie in with communication decisions . Frances notes that the most important thing about the use cases is the identification of the information exchanges o Parties discuss performance requirements . Frances expresses concern about performance issues and requirements  Under what situations will performance be hindered? Design of the system (controllers or proxy gateways) or something else? . Some parties think the use cases could be annotated with frequency of observation and timescale . Parties note that not all use cases will be applied to all inverters . Does it need agreement from the group or can it be open to implementation? o Parties ask what you need most to ensure operation to change/maintain operation . Use this to look at upstream requirements for configuration, etc. o Parties ask what size systems a use case applies to . Frances notes that this information can be put in the additional information column . Frances notes that low hanging fruit could be target first, which could be industrial or commercial systems o Next steps . Is the next step to fill out more in these use cases as well as more ranges other information?  Data exchange decisions o Frances notes that this is the most pressing topic o Exactly which data objects must be supported for each of the phase 1 functions? . Are there any questions or comments on the SunSpec Alliance data objects? o Should the Frequency-Watt function (currently in Phase 3) be added? What about other functions such as monitoring? o What is the range of performance requirements for each function?  Configuration decisions o Should a single "common protocol" be required for all stakeholders (manufacturer, utility, aggregator, DER owner) to use for data exchanges between stakeholders o Frances asks that parties submit feedback on the configuration issues Next steps  Get use cases going  Submit comments and suggestions</p>