Back in the days when tinkering about “hacking” watt hour meters by tweaking the dials inside. Who knows these analog watt hour meters can be bidirectional or reversible when there is an opposite power generation. Could be from a gasoline or diesel generator, from a wind turbine, or from a massive solar power system controlled by a grid connected DC-AC inverter. Now solar power systems booming and the demand for the reversible meters are on a high. Lucky for me to have one.