Sunday, October 31, 2010

First readings

It's the end of our first whole month so we can now see how well we are doing. Here is a small print out of the readings. Numbers are in Kilo Watt Hours. September's reading is what we generated from the 21st to the end of the month. I want to track from the 1st day in the month in order to be able to compare to the predictions as accurately as I can.


Note: Hydro Meter is accumulative. Therefore the difference from the first of one month to the first of the next month is the Amount of energy generated.

What you see in green is the predicted hours I should generate, and the numbers I relied on to predict the return on investment. This was using the PV-Watts program.The dark blue Enphase numbers are what you will also find on the  Enphase link in the blog. It is what the inverters are telling Enphase what they are producing. As you can see they do not match what the Hydro meter is saying. I am not sure why yet, I am investigating. The good news is even the hydro meter shows a 3% improvement over the prediction for first month and 32% for the second. Very happy with that. Don't know if it is going to hold so stay tuned. I will update again next month.