[JohnS99]

My line voltage is running at 251v-261v most of the time when the sun shines. (Northern Power are aware, too much solar energy being generated in the area with nowhere to go!). Remembering my schooldays long a go when w=iv, v=ir etc, if 'r' is constant then 'w' increases with 'overvoltage'. Does this mean I am recording more kwh units for my energy usage? (On the other hand things like the oven are heating up quicker so not using as much energy.) What about my SEG export meter? Does this record more or less as the voltage increases? Calculators out.

[rwh202]

You pay for energy consumed and / or exported. That remains the same.

Yes, resistive heating will operate at higher power, but for less time, consuming the same energy. In fact, might be slighter better off since a kettle boiling quicker will have less heat loss than one heating slower.

Other electronics with switch mode power supplies might be more efficient at the upper end of the voltage range too, with less I2R losses.

Overall, next to no difference and nothing like say 10% extra voltage = 10% extra cost or anything like that.

[geoffers]

Originally Posted by JohnS99

My line voltage is running at 251v-261v most of the time when the sun shines. (Northern Power are aware, too much solar energy being generated in the area with nowhere to go!).

Could this be a situation which justifies getting an air-conditioning unit to run on hot summer days for instance, to burn off the excess energy 😎