Hey everyone! I've set up a Deye SUN-12K-SG04LP3-EU hybrid inverter with 30 TATA 330W solar panels and four Deye SE G5.3 52V, 100Ah LiFePO4 batteries, totaling 20.48 kWh. My system has been running well in off-grid mode for two months, and since it's stable now, I decided to switch to grid tie and use excess solar power in my workshop without net metering due to local regulations. I want my smart load to charge the batteries first and then use spare solar energy for my workshop. However, I'm having an issue where the smart load keeps drawing from batteries even when the solar isn't sufficient and the battery's State of Charge (SOC) is below 95%. I thought setting 'on grid always on' would allow my system to switch to grid power when required, but it seems to just keep drawing from the batteries. I've contacted Deye, but they say my firmware version from 2021 is the latest. Is there a way to make the smart load switch to grid power when the battery falls below 95%? I'm even considering using a Pi 5 Home Assistant server to monitor the situation. Any thoughts or suggestions would really be appreciated! Thanks!
1 Answer
It sounds like you're looking for your smart load to be more responsive to the battery level, specifically to switch to grid power when the SOC drops below 95%. You might want to check your time-of-use settings and any minimum battery percentage configurations. For detailed setup instructions, refer to the Deye manual on page 34, but your setup should have zero export enabled with the CTs installed properly if you're sticking to no grid export. If adjusting those settings doesn't solve it, you could consider a custom script for your Home Assistant to monitor and switch to grid power at the right SOC.