Error in measuring the energy

[SteveWi-291]

Voltage and current are measured on a Gosund SP111 socket. The power/apparent power was almost 1900W. The socket with Tasmota 8.5.0 calculated the following:

After 10 min 47Wh
After 15min 70 Wh
After 20min 94Wh

But if I calculate E = P*t, the following should come out:

E(10min) = P * t = 1900W * 0,167h = 316Wh
E(15min) = P * t = 1900W * 0,250h = 475Wh
E(20min) = P * t = 1900W * 0,333h = 633Wh

How is it possible that the displayed value in the Tasmota interface is only 1/6 of what it should be? But since the correct power was measured, it can only be a calculation error by Tasmota?

p.s. Voltage and current were relatively constant at 8.4 - 8.8A and 224V. So the consumption should have been at 31Wh per minute and not 4.7Wh as I was shown on the Tasmota surface...

[arendst]

See #9263 and #9266