Back in the 1950s there seemed to be a lot of interest in secondary capacitors for residential services. For example, Sangamo offered the "Secovar" line of 240V 2KVAR caps for installation at the meter location. They came in three versions: a separate box which connected to the meter box by a nipple, a box with male and female meter jaws on opposite sides which was inserted between the meter and the meter box, and a meter box with the caps inside.
Several companies also produced pole-mounted secondary caps.
