Photovoltaic array output for 2014 so far

My 1.5 kWh (theoretical maximum output-it actually maxes out at 1.35 kWh) PV array is steadily increasing its production so far in 2014.

Power production from my 1.5 kWh solar array is steadily increasing so far in 2014

We have recently set the PV array angle at 45 degrees since the sun is higher in the sky these days. We plan to re-set the array angle four times at year to accommodate the changing position of the Sun in the sky visavis the Earth.

Advertisements

Does solar energy work in rural Iowa?

With the drop in prices for solar panels, power generation from solar panels in a photovoltaic array, is now within reach of rural Iowans. The winter sun, on a good day, has been strongest from 10:30 a.m. to 2:30 p.m. Those are the peak hours for my array so far. On a good day we generate in the range of 7-9 kWh. We have had cloudy days, of course, when we generate less than 1 kWh. Our daily home use, depending on the amount of heating and cooling we are doing, is between 20 and 40 kWh per day, so my goal for the next year is to produce about 20% of my power with this array.

So far, January 23 has seen the highest one-day production, 10.1 kWh. My array started generating power at 7:40 a.m. and shut down at 5:25 p.m. on that day. January so far has been an up and down month with a sunny day followed by a cloudy day typically.

March 2, 2014 update

January usage: 1646 kWh (47 kWh per day)

January PV array production: 149 kWh (9% of usage)

February PV array production: 166 kWh

PV array production so far in 2014: 315 kWh

March 23, 2014 update

Today we manually changed the angle on our array to approximately 45 degrees. This is necessary due to the fact that the sun is higher in the sky as the days get longer. Check out this handy solar angle calculator: http://solarelectricityhandbook.com/solar-angle-calculator.html.

6-panel solar array rated at 1.5 kWh. We installed this array in December 2013.

6-panel solar array rated at 1.5 kWh. We installed this array in December 2013.

%d bloggers like this: