Specifications include, but are not limited to: This project is for the installation of an electric battery energy storage system (ESS) at the City of Middleton Police Station located in Middleton, WI. The design-build contractor shall complete the design, procurement and installation of the battery system as detailed in the performance specification. A 90kW(ac) solar PV system has been previously installed and the associated distribution shall be modified as required to work with this new battery system. 1. Base Bid: 100-150 kW-hr (50-75kW) battery and bi-directional inverter, manual control. 2. Alternate Bid 1: 100-150 kW-hr (50-75kW) battery and bi-directional inverter, automatic control. Refer to contract drawings for depiction of automatic control intent.