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7.A. - Page 191 of 285 2019 Nonresidential New Construction Reach Code Cost Effectiveness Study the battery comes from a renewable source. Thus, the Reach Code Team also applied a 19 percent cost reduction to battery costs. 3.2.3 PV -only and PV+Battery Packages The Reach Code Team analyzed solar PV and battery storage only, without other efficiency measures in both mixed -fuel and all -electric building designs. Two different sizes of solar PV and battery storage were analyzed. ♦ Small PV Size: 3 kW, assumed to be the minimal PV system considered for installation in a nonresidential building. ♦ Large PV Size: PV capacity equal to 15 W/ft2 over 50 percent of the roof area, or sized to nearly offset annual electricity consumption, as described in Section 3.2.1. ♦ Small Battery Size: 5 kWh, assumed to be the minimal battery system considered for installation in a nonresidential building, and representative of smaller products currently available on the market. ♦ Large Battery Size: 50 kWh, assumed to be a substantially large size for a nonresidential setting. Generally, the reach code team found diminishing on -bill and TDV benefits as the battery size increased. As described in Section 1 and Section 4.4, each PV size was run as a standalone measure. When packaged with a battery measure, the small PV size was paired with the small battery size, and the large PV size was paired with the large battery size. 3.3 All Electric Measures The Reach Code Team investigated the cost and performance impacts and associated infrastructure costs associated with changing the baseline HVAC and water heating systems to all -electric equipment. This includes heat pump space heating, electric resistance reheat coils, electric water heater with storage tank, heat pump water heating, increasing electrical capacity, and eliminating natural gas connections that would have been present in mixed -fuel new construction. The Reach Code Team selected electric systems that would be installed instead of gas -fueled systems in each prototype. 3.3.1 HVAC and Water Heating The nonresidential standards use a mixed -fuel baseline for the Standard Design systems. In most nonresidential occupancies, the baseline is natural gas space heating. Hotel/motels and high-rise residential occupancies also assume natural gas baseline water heating systems for the guest rooms and dwelling units. In the all -electric scenario, gas equipment serving these end -uses is replaced with electric equipment, as described in Figure 9. 16 RE 2019-07-25 443