Bob Minchin wrote:
The Natural Philosopher wrote:
tony sayer wrote:
I too have just had a PV array fitted. The old "Disk" meters would
run backwards, the new electronic ones won't.
You will normally only get an export meter if you have a large array.
They just assume you are using 50% of the energy generated for the
export tarif.

And just how much power are these generating on an average day ?..
about 30W/sq meter average.

Could be over a KW on a hot sunny day.
My system is quite small = 16.7 sq m rated at 2.35kWp.
It has produce 350kWh since 1st February this year which will pay out
£150 ish plus any saving on power consumed.
As the sun gets higher in the sky the daily totals are rising.
Yesterday was 11.25kWh. Instantaneous power available is regularly in
excess of 1.6kW and can exceed 2kW
Even on a grey day when it is raining, 3-4kWh are produced per day


so in *real* terms it produces an input worth between 12p and 45p per
day, if you discount the ridiculous subsidies.


Bob