- Load Analysis
In order to review the technical suitability and the financial implications and carbon-saving potential of any solution, the energy demand and load profile of the carport need to be considered. This means identifying how much energy an asset requires and when. A load profile from EV charging points and/or other electrical loads (lights, AC, elevators, etc.) is determined and an aggregate energy demand over the day, month and year can be calculated. The number and type of vehicles, as well as the charging time requirement, help to determine the appropriate sizing and specification of the EV charging points.
- Solar Canopy and Associated Equipment
The location of the carport and parking bay layout are important variables when determining the best canopy design option. Local weather conditions affect wind and snow loading on the canopies and in turn the foundation and structure design. The parking bay layout influences the direction of tilt on the canopies which should be designed to optimize yield. Aesthetic considerations are also important and can be accommodated in new designs and in most retrofits. Solar PV modules and associated equipment are identified at this stage.
- Energy Yield Assessment
Once the solar PV layout and equipment have been specified, an energy yield assessment is completed. This determines the total energy yield from the solar PV modules that can be fed into the system as well as the hourly, daily, and monthly generation profile.
- Battery Sizing
Having profiled both the carport’s load and the solar PV facility’s generation, the two can be analyzed together to anticipate the extent to which the solar PV facility is likely to meet the demand, whether there is sufficient excess energy at points throughout the day to justify the use of a battery and if so, what size should the storage system be.
- Energy Management System
In order to meet the energy demand using the most economic and lowest carbon source mix of generation from the solar PV and BESS facility (and the corresponding level of supply from the grid), an appropriate energy management system needs to be specified. This can be driven directly by the BESS management system capable of dispatching the required load through algorithms aiming at maximizing solar absorption and minimizing overall cost of electricity.