First full week

Right, first full week of solar generation completed - here's the total kWh generated for each day over the last week since installation:

Wed 8.3
Thur 5.2
Fri    3.9
Sat 10.4
Sun  2.5
Mon 5.5
Tue   5.8
Total 41.6 kWh for the week
Avg 5.9 kWh per day.

As you can see, the values vary considerably despite being over 7 consecutive days, with virtually identical amounts of daylight (sun up to sun down).  The differences are due to cloud cover.  Even for the HIT panels, when the sun goes behind moderate cloud, the drop off is noticeable.

I've detailed in a previous blog post ("First full day") about how I have worked out the predicted average daily kWh for each month.  The seven days above span across the end of August and beginning of September, so I've crunched those two months averages and the prediction shows an average of 5.46kWh/day for this period.

Therefore at the moment, I'm getting about 8% more than predicted, which, if consistent over the year, translates into a final year prediction of 1776 kWh for the year.

As the winter nights draw in, and the cloud cover is more frequent, the predicted daily averages drop off as follows:
October:     3.18 kWh / day
November: 1.79 kWh / day
December:  1.13kWh / day

The panels were working absolutely flat out for a good chunk of Satuday (August 31st). I checked the inverter a couple of times over lunch when the sun was at its highest, and they were kicking out 1920W, which is their theoretical maximum. It was sunny all day on Saturday, with only intermittent hazy cloud cover from time to time - hence the 10.4kWh total for that day. It's worth noting that the predicted daily kWh average for *June* is 7.59kWh.