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 Post subject: 64 bit version
PostPosted: Thu May 26, 2016 10:41 am 

Joined: Thu Jul 09, 2015 5:34 am
Posts: 44

We often work on quite large projects and the recent speed improvement of pvsyst during the shading calculation phase was a gift from heaven for us.
Because of this we maybe became too used to not optimizing the shading scene before porting it to pvsyst because the calculation time was short enough anyway.
This brought out a new issue that we never had before, the calculation of the shadings used more than 2GB of RAM memory and, being pvsyst 32bit, crashed.

Now, take this as an inquiry more than a request, we would were wondering if you are planning of releasing a 64bit version of pvsyst so it could overcome the memory limit and let us be even more lazy with the optimization.

Thanks for the wonderful updates so far and best regards.

 Post subject: Re: 64 bit version
PostPosted: Tue Aug 09, 2016 11:13 pm 
User avatar

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1658
I think that using a 64 bits addressing system is not possible with our developing platform DELPHI.
But this has to be confirmed with our IT specialists.

 Post subject: Re: 64 bit version
PostPosted: Thu Dec 01, 2016 1:56 pm 

Joined: Thu Nov 10, 2016 2:14 pm
Posts: 9
Location: United States
So what the IT specialists said?

 Post subject: Re: 64 bit version
PostPosted: Tue Mar 28, 2017 1:06 pm 
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Joined: Wed Oct 31, 2012 11:12 am
Posts: 118
Hello there,

It would be technically possible to make a 64 bits version of PVsyst, but it would currently take too much time for low gain, here's why :
Before version 6.60, there was a known limitation when calculating shadings for big scenes which had many string partitions. The shading calculations have been refactored since in order to use less memory and be faster.

So if you still have this kind of issues in version 6.60, can you please send us the project which crashes because of memory limitation ?

 Post subject: Re: 64 bit version
PostPosted: Thu Mar 30, 2017 5:13 am 

Joined: Thu Jul 09, 2015 5:34 am
Posts: 44
I just sent a SHD file that keep crashing on my pc to admin@pvsyst.com
Best regards

 Post subject: Re: 64 bit version
PostPosted: Thu Mar 30, 2017 5:26 am 

Joined: Thu Jul 09, 2015 5:34 am
Posts: 44
Sorry, disregard my previous mail and reply. I just sent you the whole project instead.
It contains a previous variant that has being calculated successfully and the second one, called 5.2m pitch, that keep crashing when calculating shadings.
Best regards

Edit1: Normally I enable optimized calculation for shadings believing that it would speed up the process. Well, I found out that in this case, disabling it, the calculations go on without any problem using very little memory and we couldn't notice a speed difference. Please clarify the function of that option.

 Post subject: Re: 64 bit version
PostPosted: Mon Jun 08, 2020 8:14 pm 

Joined: Fri Feb 02, 2018 10:51 pm
Posts: 11
Looks like PVsyst just released a 64bit version. Trying figure out how to download but I thought I would respond to this thread.

In version 7.0 (25.05.2020) 5.25.2020 May 25th.

New features:

Support of 64-bit architectures : this will extend PVsyst capabilities of handling large projects and shading scenes
Irradiance: new improved treatment of the circumsolar component, impacts on the electrical shadings and vertical Bi-facial systems
System : unlimited number of sub-arrays
Shadings : conversion of fixed tables to trackers, new trackers with central gap parameter for bifacial, import of trackers from Helios3D, import of PVC files
Output AC circuit : definition of several MV and HV transformers, with their specifications
Live results display : see results values and graphs while the simulation is running
Economic evaluation : Levelized Cost of Energy (LCOE), Net Present Value (NPV), multiple loans of multiple types, advanced depreciation configuration
Economic evaluation : now available for Stand-alone and Pumping systems
Simulation : display of warnings during the simulation and with the results


Module Layout: great improvements in submodule shading calculations accuracy, print of the layout has also been improved and can now be printed in the report
User interface : improvements of the user interface and user experience
License management simplification
Localization : full-software translation coverage (except the Help), Turkish and Korean languages now available

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