Montgomery County began testing 41 solar-powered parking meters earlier this year in Bethesda, giving drivers a chance to pay via credit and debit cards. The meters were being tested as part of a three-month pilot program that began on March 1, but the program has now been extended until July 1.

That is because the county added one final feature to the meters: a display letting drivers and parking enforcement officers know how much time is left on the meter. This last phase of the program began late last month, and the county extended the length of the program to better see how the display time works out.

The parking meters are on Norfolk Avenue between Woodmont and Del Ray avenues.

And if you do park at one of these meters, the county wants to hear about your experience. Here’s a survey asking drivers what they did or didn’t like about the meters.