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

There is a new version 2.5. News: thermoelectric generator (TEG, Seebeck effect), improved hourly and minutes step irradiation.

Fixed an error that occurred with inverters of low power (the unmet load was not considered in some cases).

In addition, when the restrictions were not met, it did not appear in the total NPC cost “INF” but in a very large number. It has been corrected so that the value “INF” appears.

The possibility has also been added that if the renewable installed power in DC is higher than the maximum allowed by the inverter, that combination is discarded.

In addition, the information of unmet restrictions for each combination is shown..

iHOGA can simulate and optimize any case of electricity self-consumption (Net Metering or Net Billing, in annual or monthly periods, including or not rolling credit, etc.).

iHOGA has been updated to avoid an error that occurs when trying to download data from NASA website and it is out of work.

In July the 17th, 2018, we have updated the EDU version of iHOGA. Corrected errors to visualize the column of the nominal capacity in Chinise language (and other non-western languages). Also corrected problem whit wind turbines which output power at 14m/s is 0.