Solar PV and Battery Energy Storage Systems (BESS) Equipment

The City of Ann Arbor’s Sustainable Energy Utility (SEU) is procuring equipment for a pilot virtual power plant consisting of 100‑150 residential solar‑plus‑storage systems. The solicitation calls for solar photovoltaic modules, grid‑forming hybrid inverters, sealed lithium‑ion battery packs with integrated Battery Management Systems, and associated software, all meeting stringent UL, IEC, and cybersecurity standards. Vendors may submit bundled solutions or individual component offers, must provide tax‑credit guarantees, and are responsible for delivery, documentation, installer certification, training, and post‑installation support. Delivery must be completed by the end of Q2 2026, with the overall VPP construction finishing in October 2026. • Supply up to 150 complete residential solar‑plus‑storage kits (≈ 5‑6 kW DC per home) meeting UL 1703, UL 1741, UL 9540, IEC 62619, and related certifications. • Provide a 10‑year workmanship warranty, 25‑year performance guarantee for modules, and cybersecurity compliance (AES‑256, TLS 1.2+, US‑based data storage, RTO ≤ 24 h, RPO ≤ 4 h). • Deliver equipment in phased shipments (April – October 2026), certify SEU‑approved installers, and offer training, O&M manuals, and ongoing support.