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Showing results for tags 'bess'.
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Dear PVsyst Team, We have a question regarding the battery losses displayed in the simulation output. The BESS loss parameters in PVsyst appear to reflect only certain categories of losses, and in our case, the "Battery Global Loss" is shown as approximately 1.9%. However, since the round-trip efficiency (RTE) of the battery is around at 85%, we would expect the total battery-related loss to be closer to 15%. Could you please clarify why only 1.9% is reflected in the simulation report? Is there a reason the full impact of the RTE is not shown under the battery loss section, or is it accounted for elsewhere in the system losses? Appreciate your guidance on this matter.
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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.
