Max Power Transfer
Calculator

Inputs

Maximum power transfer (W)
0.72

Results

Maximum power transfer (W)
0.72
Matched load resistance (Ω)
50

Electrical results

Maximum power transfer (W)0.72
Matched load resistance (Ω)50

formula-map diagram

Maximum power transfer (W)
0.72
Matched load resistance (Ω)
50

Electrical relationship

Formula

Pmax = Vth² / (4 × Rs), when RL = Rs

= 0.72

Note

This is a simplified model: it applies the textbook relationship to the numbers you entered and assumes ideal components, steady-state sinusoidal conditions, balanced loads and copper resistivity of 0.0172 Ω·mm²/m at 20 °C. It ignores component tolerances, temperature drift, skin effect, harmonics, inrush, transformer and battery losses, and it is not a substitute for the wiring code that applies where you are. Have any installation sized and verified by a licensed electrician or engineer.

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