Fourth solar panel added with no results

I have added a fourth solar panel to the solar array. The objective was to increase the regeneration time of the battery. As indicated the new solar panel did not provide any additional benefit. The battery currently is now getting old and I believe it is loosing it's efficiency. I noticed that the additional solar panel did not make a difference as the math indicated that it would improve the speed of regeneration. I would think that this real world type of experiment using off the shelve products is good indication that solar and battery operation are maturing; however, one can see after a few years of operations that maintenance on the battery is required. Yes the array is working a higher level but I thinking as well I have provide more power than the power box can administrate.

I will pickup a dedicated high cycle 12 V long lasting (100 hour) battery. I will also have to add a new controller and now add an inverter. The inverter is optional but necessary to test other MOBO.