Times they is Worryin

At least we dont measure water in "acre feet" which they do in the USA. That sounds to me like more like an animal illness ! As in "poor creature got acre feet, so I shot her to prevent suffering."

Referring across to another thread, the Americans seem to measure air conditioning and heat pumps in "tons".  I have no idea how that translates into kilowatts.

1 "ton" = 12,000 Btu per hour.

Acre feet seems reasonable to me - how big is your farm, and how deep is the flood water?

Any of these have to be better than the output of PV systems - often given in kWh/year. Why not just kW?

Chris Pearson said:

Any of these have to be better than the output of PV systems - often given in kWh/year. Why not just kW?

Because the output of the system varies wildly from hour to hour.  Mine could be anything between 0kW and 3.4kW,  So people usually quote the typical total output over a year.

I think it sounds more impressive if you measure it in MWh per year.

Chris Pearson said:

Any of these have to be better than the output of PV systems - often given in kWh/year. Why not just kW?

Because the output of the system varies wildly from hour to hour.  Mine could be anything between 0kW and 3.4kW,  So people usually quote the typical total output over a year.

I think it sounds more impressive if you measure it in MWh per year.

Yes but you are still using a unit which includes time per time.

because you are indicating a time-average over the year, daily generation is very bumpy - indeed zero at night...

Mike