In article , Martin Brown '''newspam'''@ne
zumi.demon.co.uk scribeth thus
On 30/04/2019 08:37, The Natural Philosopher wrote:
On 30/04/2019 08:15, wrote:
How realistic are the manufacturers claims for energy produced by
their solar pv panels. If they claim 2kw howlikel is this to be
true/realistic ?

realistic at midday in June.

It is better than you might think in winter direct sunlight since to
some extend the cold makes the panel a bit more efficient.

You can also push solar panels a bit harder at the risk of cooking them
by adding a couple of mirrors either side. Some fold out portable
battery chargers work that way.

Average about 20W

Pessimist! The usual figure for the UK is about 900kWhr per 1kW peak of
PV panel which in ballpark terms is about 100W average (taking a year as
9000hr). The further north you go the worse it gets.

Even so I am inclined to think that solar is a bit of a waste of time in
the UK since it isn't really sunny enough to be worthwhile. At lower
much sunnier latitudes where peak solar power generation coincides with
peak aircon demand then having an extra layer on the roof providing
shade and solar PV power serves a useful purpose.

A lot of UK solar generated electricity is immediately dumped into the
homes immersion heater because of FIT market distortions. You get paid
for half of what you generate irrespective of what you do with it!


Well right now. 30/4 at 12:14 not that sunny today Gridwatch is
reporting 6.31 GW 16% which is a fair chunk of the UK demand..

--
Tony Sayer


Man is least himself when he talks in his own person.

Give him a keyboard, and he will reveal himself.