New version 3.3 published in September 29th, 2022. News:

Added a new li-ion LiFePo4 battery degradation model (Naumann et al., 2020).

MHOGA: In maximization of the net present value (NPV) projects, added the constraint of the minimum renewable capacity factor (sold energy divided by peak power of the renewables multiplied by 8760 h).

MHOGA: In maximization of the net present value (NPV) projects, added the constraint of the maximum land use.

In maximization of the net present value (NPV) projects, added the the result of the renewable capacity factor (sold energy divided by peak power of the renewables multiplied by 8760 h).

MHOGA: In maximization of the net present value (NPV) projects, added the result of the land use.

In maximization of the net present value (NPV) projects, when a solution does not meet all the constraints, it is assigned an NPV of –infinite (before it was assigned 0).

Added the number of cycles to failure for 100% DOD of the batteries.

Fixed bugs

New version 3.2 published in April 2nd, 2022. News:
Added calculation of direct irradiance when downloading data from databases.
Added graph of direct irradiance.
Added possibility to consider Concentrating PV (CPV) modules or generators.
Corrected bugs when downloading NASA hourly data.
Corrected bugs of multi-objective optimization (when using unmet load as objective).
Corrected bug when calculating back surface irradiation if solar tracking (one or two axis) was selected.
Corrected minor bugs.

NASA has changed the formta of the download files of irradiation, wind speed and temperature. The software has been adapted to these changes

-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