-Corrected bug when downloading the first time hourly irradiation from NASA, it didn’t update the latitude to calculate the irradiation over the tilted surface after downloading the hourly irradiation.

-Corrected bug when downloading Renewables Ninja irradation hourly data in the south hemisphere with tilted surface.

January 10th, 2022, corrected bugs: right axis of the main graph of the simulation screeen and hourly fuel consumption of the AC generator

November 12th, 2021, corrected bugs when downloading data form databases in computers that use comma as decimal separator.

New version 3.1 published in November 2nd, 2021.

• Added the possibility to use bifacial PV modules.
• Improved reports
• Improved the visualization of the application, adapting to different screen sizes and DPI.
• Added visual themes.
• Fixed minor bugs.

Modified the method to download NASA data as their database changed. Also added method to download hourly data from NASA. Fixed bugs

New version 3.0 available, with many important new features:

• Added multiperiod simulation and optimization: iHOGA can consider the increase in load and the decrease of electricity production from the renewable sources during the years of the system lifetime, simulating the real performance of the system during all its lifetime (20-30 years usually) and calculating the real costs and incomes, obtaining the real net present cost (NPC) or net present value (NPV).  It can also consider variable inflation in electricity price during the years and different irradiation and wind speed for each year.
• Added the optimization (maximization) of the net present value (NPV) for generating systems (grid-connected generators, with or without storage), calculating the internal rate of return (IRR). Also possibility to optimize minimizing the levelized cost of energy (LCOE) in generating systems (sum of present costs, not incomes, during the lifetime, divided by total energy injected in the grid).
• Added the optimization of the contracted power in grid-connected systems and more options.
• Added the pumped hydro storage (reversible pump turbine or pump and turbine) with control strategies similar to the grid-connected batteries.

Modified the methods to download NASA data and Renewable Ninja data as their database changed

Before the effect of the shadows was not considered in the hourly irradiation downloaded from PVGIS or Renewable Ninja. Now it was added.

Added the possiblity to download hourly data of irradiation, wind speed and temperatura from PVGIS, for several years.

Fixed the following bugs, updated EDU version:

• Error downloading irradiation data for several locations from Renewable Ninja.
• Error in calculation of shadows