Our 4.9kW solar system has performed well we think. Based on 1 year’s data the average figures per day are:
Produced 17.51 kWh
Monthly data can be seen in the following graph.
January and December figures are high because of Christmas and New Year family social gatherings and entertainment – additional cooking (all electric) and hot water usage.
I will also need to try an identify why in October, so much electricity was used.
To help in getting our average down to 8.26kWh, the most electricity hungry activities (washing machine and the air-source heat pump for the hot water) are set to work only at night. All other heating is from the wood stove, and cooling in the summer simply by the house insulation (earlier post insulation for more details), and natural air flow.
To help improve the figures for 2015, I hope to work out how to use the hot water system better (all the instructions are in Japanese) to control more closely when and how much water is produced.
Any comments or questions on these results most welcome.