Minion Posted April 15, 2022 Share Posted April 15, 2022 Hi, I'm studying solar energy design. To verify these variables(E_Avail, E_load, E_user, I_user), I want to know the formula. With the help of the two sites below, I calculated with the variables calculated by PVsyst, but I can't calculate it because I don't understand the calculation process. Could you tell me about the formula? Reference sites: https://www.pvsyst.com/help/index.html?module_quality_loss.htm http://digital.library.wisc.edu/1793/46720 Please Help Regards Minion Link to comment Share on other sites More sharing options...
Minion Posted April 15, 2022 Author Share Posted April 15, 2022 Upload the variable information used in the calculation. PVsyst Output data.pdf Link to comment Share on other sites More sharing options...
André Mermoud Posted April 20, 2022 Share Posted April 20, 2022 This depends a little bit if you are in a Stand-alone system, or a grid-connected system with storage. For a stand-alone system, these values are fully defined in the help "Project design > Results > Simulation variables: Stand alone system". Except perhaps IUser = EUser / UBatt (the user is supposed to be fed directly by the DC bus). For a grid system with storage (self consumption mode), this is explained in the help "Project design > Grid-connected system definition > Grid systems with storage > Self consumption with storage". Pay attention on a difference: here E_User is the user's needs, which are referenced as "E_oad" in the stand-alone system. Link to comment Share on other sites More sharing options...
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