Figure 1

This is my 'baseline' day - How the house performed without heating from the Sun Lizard or any other introduced source. The day was a fine suuny Winter's day with a slightly higher than normal maximum temperature. As can be seen, the 'inside' temperature only rose from a minimum of around 13°C to a max of around 15°C.

Figure 2

This is an example of a day with similar starting temperatures to the above 'baseline' day, but with the Sun Lizard turned on. The amount of default heating wasn't as great (Roofspace temperature was down by 2 degrees and Outside temperature was down a little). There was some intermittent cloud cover between about 11:00 & 13:00. It can be seen that the Inside temperature rose higher than the baseline day - This was due to the heating of the air in the living area by the Sun Lizard.

Figure 3

This is an example of a day with good solar exposure, but with lower inital temperatures. Therfore, the Inside temperature didn't rise as high.