Patrik

Hi, Martin ! Yes, so battery is working but if I compared the AC/DC coupling for project it not working right, the usage of DC coupling battery is so low and there is a huge feed-in to grid. graph.1 : Without battery system. There is grid Feed-in 1243 kWh/y. graph.2 : PV system DC coupling battery system. There is grid Feed-in 1120kWh/y. So battery is working but it is so limited. There is enough capacity to store more energy and reduce the grid feed-in. graph.3 : PV system AC coupling battery system. There is grid Feed-in 199 kWh/y. As you can see when I use AC coupling PV system, there is a huge difference compared to DC coupling. And also no energy from grid is used to charge batteries. If i compare both systems there should be nearly same grid feed-in, if batteries are not charged from grid. Maybe there is something that i forget about. Thank you for helping me. Patrik Enclosed project in attachments. PVSOL_1.pvprj

Hello, I want to ask about CD coupling system, I created BYD battery with DC coupling but there is an issue that the battery is not working properly. PV system should be working fine, but after calculating there is no use of battery for my application of grid connect battery system with own consumption. As you can see on the graphs above there is only battery charging but no use of battery storage to feed the load. Is there something that i did wrong or it is just your system issue ? I also tried a DC generator coupling but nothing changed. I also enclose project in attachments and the parameters below. I also want to regulate the feed-in the grid but i was not able to achieve this without operative battery system. Thank you for your help with this problem. It took me a lot of time solving this, but with no satisfying result. Patrik PVSOL_1.pvprj