Specifications include, but are not limited to: A. Purchase, furnish, and install a stand-alone PV system for primary power to residences located in the Hopi Reservation. The cumulative sizing of the PV array shall not be less than 2,800w (2.8 kW) and shall not be less than 800A-h battery bank (sizing is calculated at 400 watts of continuous load and no less than 3 days of autonomy at 80% Depth of Discharge). Collectively, the PV array and available battery tie-in connection will comprise the base. B. The PV component of the power system (PV structure) shall be contained within a single, standalone structure designed for ease of access to the PV modules (array) and the balance of system (BOS) for periodic operation and maintenance (O&M) activity by Hopi Tribe personnel. It is desirable that the PV array be physically distant from the residence to limit intrusion into customer’s personal living space. C. The stand-alone power system must be able to have wireless capabilities for communication & monitoring. D. The power system structure shall be constructed of materials which tolerate elements characteristic of high plains desert andmountainous terrain, made to withstand extreme heat and cold conditions, and protect system components from dust and sand stirred by high winds. E. The power system structure shall incorporate features which make the system tamperproof from customer abuse. The power system must have a shut-down feature (wirelessly) which may be used for emergency shutdown. System must provide the recharge status of the system and limit the opportunity for customer overuse and abuse.
