My March effort…
Out of 104 Hours* of Sun & 59 mm* of Rain My Kit managed this;
Total generation: 272 kWh
222 kWh Mar 2018,
270 kWh Mar 2017,
284 kWh Mar 2016,
294 kWh Mar 2015,
309 kWh Mar 2014,
201 kWh Mar 2013,
366 kWh Mar 2012, Avg to Date= 277 kWh
PVGIS (classic) 230 kWh = 118%
PVGIS (cmsaf) 274 kWh = 99.2%
Daily average: 8.77 kWh
Generation per kWp: 77.7 kWhDaily average per kWp: 2.5 kWh
Best day: 19.1 kWh – 25th
Worst day: 1.41 kWh – 3rd
Capacity Orientation Slope Lat Total Best Worst PVGIS(c) %PVGIS kWh/kWp Daily/kWp Days
3.5 225 35 51.3 272 19.1 1.41 230 118
77.7 2.5 31
*source
http://www.martynhicks.uk/weather/data.php