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Posted to uk.d-i-y
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solar pv to storage heater
In message ,
writes
Interesting feedback thanks. Obviously not a good idea is the general
consensus.
Just as a matter if interest I thought Id run these figures by and see
if I can get a
clearer picture... My electric storage heater uses 12kwh a night on
cheap rate
night tariff. (Thats 85 p/night) That gets it nice and hot.
Im trying to calculate how many panels would give me the equivelent of
12kwh mains a day...so...
How does one calculate average annual UK output for each 100W panel?
Assuming more in summer less in winter etc.
And how can that be converted into 12kwh/day? In other words
in the UK, if one wanted 12kwh for *general use heating* during the day,
how many 100w panels, on average, would be needed to get the
the equivelent of a mains 12kwh/day input?
Thanks ahead.
On a 4kW SSE-facing array in Sussex, with some shading from trees in
December/January, I get about 3.5MWh/year, so on average, just under
10kWh/day. But that's mostly in May to September. Daily outputs are as
high as 25kWh in summer, but at this time of year 3 kWh would be
exceptionally good, and a dull day might yield only 500Wh. So to
guarantee 12kWh on any day, I make that nine hundred and sixty 100w
panels :-(
HTH...
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P
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