Most batteries don't last 10 years. You have done well my son.
What make, model, and panel do you have? Are there any fault codes displayed?
What is the voltage under load? Operate tilt back into relief, read voltage at that point.
Problem sounds like battery as you have to press the contactor in. That indicates that there is not enough voltage to draw the contactor in, but once in there is enough "hold in voltage" to keep it engaged.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.