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PUC hears sharp disagreement over NEM Plus battery-to-solar ratio; industry urges rapid resolution
Summary
Parties debating amendments to the NEM Plus tariff differed sharply over a proposed PV-to-battery size ratio. Hawaiian Electric raised concerns the DER-party ratio could be insufficient for grid services; DER representatives said the utility's 1:2 PV-to-battery ratio is a nonstarter and urged the commission to approve flexible rules quickly.
The Public Utilities Commission heard extended debate over proposed amendments to the Net Energy Metering Plus (NEM Plus) tariff, with disagreement concentrating on the permissible ratio of photovoltaic (PV) capacity to battery capacity for customers seeking to add storage to existing NEM systems.
Hawaiian Electric raised concerns that a DER-party–favoring ratio could leave too little PV to reliably charge batteries for grid services; Rocky Mould and other DER-party representatives said modeling is…
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