It took almost 2 years of nearly non-stop running to get my basement from 75% down to 50%. Now the units rarely run. So be patient. And don't hesitate to empty the bucket whenever you are near the unit, even if the bucket is not full at that moment. When the bucket is full the unit is not running and is "falling behind".

Thank you for taking the time and effort to respond. I figured it would take longer to to get the moisture out of the walls and wood then it did to initially draw it our of the air. I don't have a bucket, it's draining directly into the sump well, so I don't have to worry about that. It's continuing to fall slowly.....

There's a constant inflow of moisture into your basement through the walls and floors, so it's not just a matter of getting the moisture out and you're done. It's a continuous job.

Ideally, the RH should be 50% or less.

Controlling moisture at its source would greatly reduce dehumidification costs. That would include sealing the basement from the exterior, keeping all windows and vents closed during high-humidity seasons and adding semi-permeable or impermeable insulation on the exterior walls and the basement floor.