Sizing a Grid-Tied PV System...with Battery Backup

摘要

Onee the decision has been made to include batteries in your grid-tied system (see "Grid-Tied...with Backup!" in this issue), next is estimating the backed-up loads' energy consumption, selecting the inverter, sizing the battery bank, and considering other balance-of-system (BOS) components.rnSystem sizing starts with the loads, which determine system components and cost. Sizing a simple batteryless grid-tied system starts with a year's worth of household energy use data (usually from electric bills) and a budget (see "Sizing Batteryless Grid-Tied PV Arrays" in HP138). Sizing the PV array (or other RE source) of a battery-based grid-tied system is done similarly, but sizing the inverter and battery bank requires more information and calculation.