Hi, We don't keep daily records, but the equipment does keep some records, which I have just got the OH to show me how to get to.
On a cloudy dull day we will make about 1 kW hour
We had a bright sunny day last week ( from about 10am to 6pm)in which we made 8.4 kWhours
I have the monthly readings too here
August 222 kW hours
September 268 kW hours
October 200 kW hours
November 90 kW hours
December 100 kW hours
January 122 kW hours
Our system has 12 panels ( 1m x 1.5m multicrystaline).
We face due South.
We live about 50 km north of Toulouse.
We do have a quite a shallow roof, which does not make it optimal for winter use, but should really benefit in the summer, if you are putting it on the ground, it may be worth seeing about being able to adjust them them for winter and summer time. ?My OH also mentioned reflectors which could extend the optimal time for your cells.
You will also need quite a bit of room for all the 'boxes' we will have to make a special cupboard for ours as they are in the hall. I will post a photo later to show you what we have.
As far as our figures go
We very roughly paid 22000€
Will get €9600 back in tax rebate
The rest was a very low interest loan which is supported by government.
We receive 56 cents per kWh for every one produced
We pay 6 and 9 cents depending on time of day, so we get a normal bill and a yearly payment for what is put into the grid.
OH has worked out that we need to make 231 kWh hours per month to break even for the installation and cost of the system. That is not taking into account reducing the electricity bill at all.
We have talked about air source, but see them as quite inefficient compared to the ground source, although much cheaper to install. the thinking is that, when you want the house warm, the source air is very cold, when you want to cooler inside, the source air is hot, so there is always a large change in temperature required, which could be as much as 30 degrees going by last winter in the UK. This is surely going to cost quite a lot in power to get that heat. With Ground source the ground maintains a roughly constant temperature of between 10-16 dregrees, so the change needed in temperature is far less and therefore less energy will be required.
I hope this has been of some help. Any more questions just ask and I will try to help!
June