Hi again,
Yes, I always test the output of the turbine going into the battery and i often use the formula, Volts times Amps to get total Watts and came up with around 13.5V*28A=380watts. I have had this continous for over 30sec intervals, as the wind rarely blows at 10m/s for any more than 1 or 2 minutes.
I also teach wind energy, and as you are all aware, if you short the output of a wind turbine, you will get high amps for a short time then usually it slows down nearly to a stop. I never use this method to measure the turbines output.
I sometimes short the turbines if i know a wild storm is coming, just for safety.
My system has an 18 amp solar array and various sized turbines going into a 12V/2000Ah battery bank, I use a 1000W Inverter which runs our fridge, which is the biggest consumer.
All this is logged with an intelligent Plasmatronics Regulator showing a 30 day history of everything you could think of, eg: Wind Amps & A/hours in battery, Inverter load amps, A/hrs out, S.O.C and solar/wind input individually.
Thanks for your reply,
Matt Au.