How to charge Storages first by solar and then discharge it during some specific hours such as 7PM-11PM. (DC and AC couple both possible in PVsyst?)

[Sang Han]

In PVsyst, is there a set up to charge BESS first and then discharge the energy into the grid at night such as 7 to 11PM? 

My utility solar project is 600MWdc and 450MWac at POI. We considered the 264MW x 4hours system using Sungrow ST5015UX-4H-US. When I used Peak Shaving mode, it only charged the extra energy over the POI limit, so once I see the result, it shows only 1.5% of energy was stored during a year. 

Our goal of the design is charging the energy into BESS during a day and then discharging it after 7PM for 4 hours. 

Can you give me advice? Also please let me know if PVsyst can support DC or AC coupling separately.  

 

Thank you. 

[André Mermoud]

Sorry, this configuration of using the storage for shifting the delivery of power to anothe period of the day is not yet implemented in PVsyst.

As a workaround for getting quantitative results, you can define a self-consumption system. You define a user's needs profile as the hours and power when you want to resell the electricity (this should be sufficient for completely discharging the battery).  The results will give you the energy delivered to the user from the solar system, which is indeed the energy that you have reinjected into the grid.

 

[Sang Han]

Thanks for the reply, I will try that.