Here are a few rewritten versions of the given line:

1. Dynamic MPPT control using variable step sizes reduces energy losses in photovoltaic systems.
2. A perturb and observe MPPT controller with adaptive step size minimizes energy loss in photovoltaic systems.
3. An enhanced perturb and observe method with adjustable step sizes optimizes power tracking in PV systems, reducing energy losses.
4. A variable step size MPPT controller employing perturb and observe technique minimizes energy loss in photovoltaic power systems.
5. Improved perturb and observe MPPT control with dynamic step size adjustment to mitigate energy losses in photovoltaic systems.

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