Category: SolarPower

 

JanOur solar panels have generated 671kWh in the first three months of the year, reasonably consistent with the expected annual profile.

January

January was patchy, with a few reasonable days.  We have no comparison with previous years for the monthly total of 94kWh, as the system was not installed until February 2017.

February

The latter half of February in particular was sunny, contributing to a monthly total of 306kWh, with several days over 20kWh.  Again, no year-on-year comparison is possible.

March

The total for March was 271kWh, slightly greater than March 2017.  A few good days, including one at more than 25kWh helped.

November’s solar power generation was, as expected, down on the summer months, even on clear days.Note, though, a few days when the panels generated 2kWh or less – a dull, cloudy month.  The total for November was 148kWh.

December was no better, even allowing for the expected fall as the solar elevation falls.

The total for December was 78kWh.

The annual picture, below, is broadly in line with the pattern predicted from the solar elevation.  There is no data for January, and February’s result is low, as the panels were installed in late February.

Total for the year was 3454kWh.

Solar power generation is falling now, relative to the summer months, as the days shorten and the solar elevation decreases.  Total generation for the month was 214kWh.  The pattern for our installation is shown below:

October has not had long sunny spells, so the pattern through the month is mixed:

A total of 336kWh in September.  This is consistent with the seasonal fall in production as the elevation of the sun decreases, though probably reduced somewhat by cloud cover – September was a very wet month.

An average summer month at 446.9kWh.

Not a bad month – total generation was 459kWh.

A good few days over 25kWh, not surprising around the summer solstice.

In February, we had 4.13kWp of solar panels installed on our roof.  In May, they generated 511kWh of electricity.  Here is the detail: