PVDP-TOU allows the creation of detailed hourly time-of-use and demand rate schedules and hourly building load/demand profiles.
When the PV system is simulated throughout one year of hourly operation, financial comparisons are created between electric consumption and utility billing before the installation of the system and after. Different rate schedules can be used before and after installation. A detailed cost comparison, statement of cash flows, internal rate-of-return (IRR%), and Net Present Value (NPV) are calculated to value the possible impact of installing the system. The system size and design can be extensively optimized to any utility pricing scheme using automated parametric analysis.
Sample TOU Rate Schedules are included including: PG&E Peak, Partial-Peak, Off-Peak, and Super Off-Peak periods with A-1, A-6, A-10, E-19, E-20, AG, E-36, E-37, and Residential rate schedules. Coming soon: SCE, SCGC, and SDREO TOU Rate Schedules. We will assist to create your utility rate schedule and load profile free of charge up to 30 days after purchase.
Excel spreadsheets and optional software utilities are included to rapidly create TOU Rate Schedules and export them to PVDP-TOU format. TOU profiles include meter charges, TOU buy and sell energy charges, demand rate charges, demand thresholds, and seasonal demand.
Sample hourly building load profiles are included. Excel spreadsheets and optional software utilities are included to rapidly create hourly load/demand profiles and export them to PVDP-TOU format.
The following screen-shot illustrates the automated parametric analysis capabilities of PVDP-TOU. By varying the number of PV module parallel strings (system kW capacity) on the X-axis, and module azimuth on the Z-axis, the corresponding Net Present Value for each system design is plotted on the Y-axis. This method allows the designer to quickly design a system for maximum financial or other benefit, such as energy production. Each Net Present Value plot takes into account TOU energy charges, demand charges, and system kW capacity costs in each case versus the alternate electric bill which also includes a separate TOU rate schedule. Differing TOU rate schedules can be used for before and after system installation (for example, Schedule "X" before PV can be compared to Schedule "Y" with PV).