Monday, 1 June 2020

Highest Ever Monthly Solar Generation

I've just seen on the news that May 2020 was the sunniest month on record in the UK. Having just loaded the data for our solar panels the results fully bear this out with May 2020 breaching the 500kWh generation barrier for the first time.

In May 2020 our solar panels generated a whopping 517kWh of electricity from the 3kWp set of panels. That's considerably more than the previous high of 460kWh produced in June 2018 which has the potential to be higher as the days are longer.

As we're still working from home, any additional electricity generated during the day is very welcome as we are using higher than normal amounts and can easily schedule washing machine loads at peak times.

Fortunately the days have been hot but with a cooling breeze which may have helped maximise the electricity produced.

Saturday, 2 May 2020

Sunniest April Solar Electricity Records

According to meteorological records April 2020 was one of the sunniest ever recorded
Sunniest April Solar Electricity Records
Sunniest April Solar Electricity Records

This was also reflected in our solar panel electricity generation, we got 432 kWh of electricity last month considerably up on the average of 360kWh and above our previous best of 415kWh.

2020 has been good so far for solar with both March & April beating previous records. It's a bonus as we're now working from home during the Coronavirus lockdown and using more electricity!

Saturday, 4 April 2020

March 2020 Record Beating Solar

March 2020 will be known for record breaking in relation to Corona Virus Covid-19 but in the UK it was also a record breaking month for solar panel electricity generation. The month seemed somewhat dull and cold but obviously there was more sun than I imagined! The cold temperatures would have also helped the panels be more efficient to improve generation too. Since mid March we have been working from home as a result of the Covid-19 virus requirements to stay inside and only travel for essential food or medicine journeys.

The total for March 2020 was 330 kWh of solar electricity produced

This compares to an 8 year average of 270 kWh with lows of 173 kWh for March 2013. You can see the full data here

Do you have solar panels in the UK? How did your data compare for March 2020? Post in the comments if you have any feedback on your own generation.

March 2020 Record Beating Solar
March 2020 Record Beating Solar

Wednesday, 15 January 2020

FIT Rates April 2020 onwards

The Feed In Tariff (FIT) rates are calculated from the base 2010 figure by applying the RPI (Retail Prices Index) rate for December to the previous rate. You can see the December rates since 2011 below.


Dec RPI Rate (%)

In April 2019 the rate increased to  54.17p as a result of the 2.7% increase in RPI for December 2018.
FIT Rates April 2020 onwards
FIT Rates April 2020 onwards
With the latest RPI increase of  2.2% announced for December 2019 this rate will increase again as shown by the calculations below:

Existing Generation rate (54.17p)  x RPI (2.2%)  = New Rate (55.36p)

So the new rate for Electricity generation is 55.36p per kWh

The export rate will also increase by 2.2% from 3.82p to 3.90p

There are various other FIT rates that apply depending on the date that your solar panels were commissioned. They will also increase by 2.7% as the RPI rate for December 2018.

Monday, 18 November 2019

Solar Panels Generation Long Term Average (LTA) Electricity Output

After 8 years we've got some pretty good average generation data for our solar panels. The panels were installed on 18th November 2011 so we've now had plenty of different weather patterns over that time to see how the totals add up.

Solar Panels Generation Long Term Average (LTA) Electricity Output
Solar Panels Generation Long Term Average (LTA) Electricity Output
Our generation meter was reading 26002 kWh this morning so that's 3250kWh per year, quite an impressive amount for 3kWp panels in the UK.

The full details are available here showing each year and month

Winter and Summer Solar Panel electricity generation

Saturday, 2 November 2019

PV Solar Panel Generation Deterioration Over Time?

Solar panels are expected to deteriorate over their lifetime and according to the manufacturers the generation of solar power can drop by around 0.5% per year.

What's interesting is that after 8 years this deterioration isn't visible and that the natural variation of the solar electricity generated is a far more obvious factor than the performance of the panels themselves.

Annual generation has varied between 2794 and 3343 kWh per year but this has not been in a straight line and generation can vary by 10% which easily masks a 0.5% variation in panels.

Friday, 1 November 2019

October 2019 - The Best and Worst Solar Generation!

The data for October 2019 is now complete and a massive contrast. The worst October power generation we've recorded since our solar panels were installed in 2011 but also the best October day since our panels were fitted.

October 2019 Solar Generation Statistics - The Best and Worst!
October 2019 Solar Generation Statistics - The Best and Worst!
Although October 2019 was the lowest ever October at 186kWh electricity generated over the month as it's been quite dull and rainy, we did have a couple of very sunny days one of which gave our best October generating day ever.

October 2018 was nearly 100kWh better at 273kWh compared to the 186kWh this year.
But October 2nd 2019 generated 16.394kWh which was the highest amount for an October day that we've seen.

Full details of the electricity generation from our solar panels is below: