Roger Chapman wrote:
On 08/11/2011 15:50, Mark wrote:
I wonder how many KW £30,000 buys?
about 300,000

Is that W or KW?
Kwh
Over what period? (I want to know the power output)


Your original question related to a school spending £30,000. I don't
know the answer for sure but if £15,000 was the benchmark for a 4Kw
array then I think it reasonable to assume the school got a 10,000 Kw
array for their money. There must be some economy of scale for the
bigger set-up but FIT wise it wouldn't make sense to exceed 10 Kw by a
small margin as that would give a lower FIT. (But rules may have been
different for schools).

What I would like to know is whether a 4 Kw array is ever going to
produce 4 Kw or will the practical maximum always be a rather lower
figure. If Harry has been watching his meter assiduously he should be
able to tell us.

My array is rated at 2.35kWp and is connected to a 2500watt inverter.
My data logger records average power over each 10 minute period.
On a few occasions the inverter has clipped the power output to
2508watts so it appears possible that an array can generate a few
percent more than it's rated power (even after allowing for inverter
efficiency losses)

Bob