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Council hears about trailerized graphene batteries; warranty and replacement timelines questioned
Summary
Staff described a trailerized "graphene" battery approach rated for long life and strong cycle life; councilors asked about warranties, replacement costs and how long the city would rely on open-market purchases if storage failed.
Staff described the proposed storage technology as trailerized graphene batteries (a sodium-based chemistry) that would arrive in self-contained units and be integrated near solar sites. Glenn told members the vendor materials projected long life and low degradation and said the batteries are rated for about 30 years under manufacturer claims.
Councilors asked practical questions about warranties and logistics: staff estimated individual battery warranties around 20 years and said that if the city had to replace an entire battery set it could take about 30–60 days to receive and commission new units, during which the city could be forced to buy power on the open market or run diesel units. Members asked staff to include replacement and maintenance scenarios in future cost runs.
Provenance: topicintro SEG 1069, topfinish SEG 1216
