Howdy! I'm new to the group. I have an off-grid 12V solar setup with 4 - 12V 8D FLA batteries in parallel with large bus bars. (approx. 606 Ah). The system load pulls 82-100W continuously 24 hours a day - 7 days a week. I am using a Renogy 60A SCC with 3 solar strings in a parallel-series config. Each string has 4 - 100W Renogy panels. During a full sun, crystal clear day the system sometimes produces over 800W with @ over 11A. Other full sun days will only produce 500W. Is this normal? I tested each string and each produces 80V as it should. I've also noticed that the battery voltage while charging never reaches more than 14.1V although boost charge is set to 14.6 Float charge is set to 13.8 but it seems to float(I think its floating) at 13.4. The boost time is set to 120 min. The R60 config is set to "USER". Each night the bank usually drains to 12.1. Some nights it plummets to 11.1 and the load auto kills until the morning. There seems to be a "hole" that the bank hits every once in a while. Do you think one or more batteries could be going bad? Batteries are 3 1/2 years old and are cycled in the manner described every single day. Should this bank of batteries be able to keep a better charge than this over night using 82-100W? The load wattage also seems to fluctuate depending on battery voltage. I use a DM1 4G data module to monitor remotely since the device is 1 hour away. Any insight on my solar and battery setup would be greatly appreciated. Thanks!