Methods and systems are presented for configuring a rectifier across a secondary side of a current transformer; configuring circuitry to harvest energy across one or more loads coupled across an output of the rectifier selectively in response to an indication that a variable line current at a primary side of the current transformer is small enough; configuring circuitry to shunt at least a first load of the one or more loads coupled across the output of the rectifier selectively in response to an indication that a line current at the primary side is large enough; and configuring circuitry to harvest energy across the first load of the one or more loads coupled across the output of the rectifier again selectively in response to an indication that a line current at the primary side is again small enough.