Keeping data of this sort highlights the efficiencies and inefficiencies of solar, production days are like a roller-coaster, up and down as no day, month or year is ever the same.
Weather, clouds and heat play a big part in all this.
I have also kept data similar to yours but in different format, mine was to work out complete payback period covering poles and line charges and the solar meter reading fee.
Below is just a little snippet from my sheet which I have kept since install, just over 6 years ago.
Most times I have entered the info in daily but as of late it is entered in about every week now since I have covered all costs and know exactly my overnight usage and when best to utilise the solar.
People don't want to keep the finer detail when installing solar and then fail to fully understand how to capitalise on the investment.
Solar to me was and is an investment of money and I have made it work for me, installing timers to run things all in daylight hours and at different times.
You can always tell when cloud is about looking at production.
June 2012
March 2021, when you go from 2 days of just producing just over 5kwh each to 37 and then nearly 40kwh cloud has a big impact overall.
