Methods and systems for operating an absorber-replenisher to supply fluid to a low pressure circuit in a hydrostatic circuit or recover surplus energy usually wasted across a pressure relief valve in the low pressure side by intensifying it for use in a high pressure circuit in the hydrostatic circuit. The absorber-replenisher 1) allows fluid flow through a high pressure motor-pump section of the absorber-replenisher from a high pressure circuit source causing a low pressure motor-pump section to turn providing additional fluid flow to the hydrostatic circuit, or 2) allows increased fluid flow from the low pressure portion of the hydrostatic circuit to increase pressure until the higher pressure induces a higher net torque of the low pressure motor-pump section to reverse the direction of the absorber-replenisher and pump fluid flow into a high pressure circuit through the high pressure motor-pump section.