I've done a number of bat house installations over the years. You can have all the known elements and it still take years to be used. Bats have a very high site fidelity. The bats you have which would might be likely to inhabit a bat house would typically form reproductive colonies often with multiple generations of related females. So it can take a while. However, I have seen bat houses used first season outside of a house with a large maternity colony and little extra space (attic).
BTW, keep an eye on the staples and mesh on your bat house. Staples can over time loosen and points sticking out can rip wing membranes. Mesh can get brittle with age and separate and provide similar hazards. What is the spacing like inside of the house? Spaces should be 3/4" give-or-take. Larger gaps make them favorable to paper wasps.
