renaud67 wrote:is it not rather 7 days of production in 3 winter months?
If that's so. By production I mean "the needle of the thermometer placed in the middle" has moved. Complement by the boiler, of course.
There have been I don't know how many days of compact low gray sky, without the circulator starting! In any case, tens and tens! Just thinking about it, I'm still depressed!
Unfortunately, I do not record and afterwards my memory fails. It seems to me that the first 100% solar day after November, cema was during a period of about 8 days of "blue sky / cold weather" in February ...