I was testing small electrical items (light, water pump, etc.) through the load on a Renogy 20A charge controller. Lights tested fine but when I tested the water pump the fuse blew and suddenly the Charge Controller went from 100% to 0% battery and displayed Error 1 Battery Over-discharged. I understand that the CC is not an accurate measure but I thought it was still unusual to immediately go from 100 to 0. There was sun out and I was hoping it would quickly show a re-charge, but the controller was displaying no charging and after a little while it started to blink the empty battery signal, and then a bit later a blank screen. The batteries still have power since the inverter is working but the CC is not responding at all anymore. I have been looking online for answers but can't figure out what is going on. Any thoughts? Thank you!