Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Maximum power (W)

Maximum power point of the cell.

Open-circuit voltage (V)

Open-circuit voltage of the cell.

Short-circuit current (A)

Short-circuit current of the cell.

Compute the fill factor of a photovoltaic cell from maximum power, open-circuit voltage, and short-circuit current. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Fill factor

Dimensionless fill factor between zero and one.

• Solar-cell and panel current, voltage, power, and fill factor depend on irradiance spectrum, cell temperature, incidence angle, mismatch, shading, degradation, wiring, and maximum-power-point tracking. Standard-test-condition ratings are not field energy predictions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Solar Cell Maximum Power

  Estimate a solar cell's maximum-power-point output from open-circuit voltage, short-circuit current, and measured fill factor at the same conditions.

• Opamp Short Circuit Power

  Estimate output-stage dissipation during an op-amp short to ground as supply-to-short voltage magnitude times the measured short-circuit current; this is not total device power.

• Solar Cell Short-Circuit Current

  Convert a solar cell's measured short-circuit current density and illuminated active area into total short-circuit current.