Renewables: "talking 'bout my generation"

KevinG

Absolute rubbish forecast for today. Forecast was continuous sunshine for every hour of daylight. At around lunchtime we got thunder and a bit of rain and the clouds have never properly cleared since. Generation will be well down on yesterday I expect.

Oscargrouch

KevinG wrote: »

Generation will be well down on yesterday I expect.

Can't wait to hear......:rotfl:

legoman62

2 excellent days
18.36kWh yesterday(sunny most of the day)
15.3kWh today (started off sunny, ended with showers)
Up to 2796.6kWh in just over 9 months:D

Oscargrouch

11.3 kWh - 28C :j

KevinG

Oscargrouch wrote: »

Can't wait to hear......:rotfl:

Sorry to keep you in suspense - 8.47kWh vs. 11.29 yesterday. It was very sunny from at least 4pm, but being SSE facing that does me very little good.

EricMears

KevinG wrote: »

Absolute rubbish forecast for today.

Or what the Met Office would call 'normal variation' - indeed it's so 'normal' that I get really excited on the odd occasion 'real life' looks anything like their forecast :rotfl:

Telly were insisting that yesterday & today looked like being hottest (& presumably sunniest ?) days of the year. Well they weren't here ! 6.9 kWh yesterday and 12.0 today.

Looking forward to being told that day will be completely sun-free; at least I'll be reasonably sure that real life will be better than forecast.

Just about to set off washing machine & dishwasher with delays to use E7 (that should make sun shine tomorrow).

Oscargrouch

EricMears wrote: »

Telly were insisting that yesterday & today looked like being hottest (& presumably sunniest ?) days of the year. Well they weren't here ! 6.9 kWh yesterday and 12.0 today.

Think they were talking about the SE mainly; we just come in to the East Anglian region;:j:beer::rotfl:

jackieblack

EricMears wrote: »

Telly were insisting that yesterday & today looked like being hottest (& presumably sunniest ?) days of the year. Well they weren't here ! 6.9 kWh yesterday and 12.0 today.

Saturday was, indeed, the hottest day of the year here (32 degrees, Essex/Suffolk border) and sunny, yesterday was also hot in the morning, but mainly overcast and very humid.

13kWh gen Saturday, 9kWh yesterday

Being hot isn't great for generation though as panels don't generate as efficiently above about 25 degrees, which is why our best months have been April, May and June for both of the last two years.

sly_dog_jonah

Oscargrouch wrote: »

13.3 kWh today:T 93.2% of SAP forecast todate. :T 12.39% ROI so far...:T But haven't got my original cash available.:eek:

Over to sly_dog-- What is the best formula for working out the true ROI bearing in mind that I have not got the original Capital available ?
OK, it should be back within 6.5 years, (slate cleared) but in 6.5 years it would have earned something on its own (however small in comparison). Over to you Einstein. :rotfl:

Thanks for the compliment

As Martyn pointed out though it is very difficult to calculate the ROI without making significant assumptions about future inflation, interest rates and maintenance costs (eg replacement inverters). Interest rates are relevant because your capital would have been presumably kept in savings and would have continued growing (however this may or may not have exceeded inflation). I believe economists refer to this as the 'Cost of Capital'. Inflation is relevant because it affects the FiT tariff, and reduces what your capital could have bought you otherwise. As Martyn points out it also depends on whether you use the FiT income to rebuild savings or for something else.

Oscargrouch

sly_dog_jonah wrote: »

Thanks for the compliment

Thanks sly_dog: The way I saw the whole deal before I took the 'plunge', was; In 6.5 yrs. we would probably have spent £10K on a decent holiday each year; cash/capital gone: Putting £7K into my size Solar gives a rough income of £1K per year, increasing with inflation, as are holidays. The income from Solar pays more than 1/2 a good holiday each year; so in real life/terms, 'job is a good one'. Only downside is having to buy a new 'Anorak' each month to stay in fashion, when you get on to a thread like this! :rotfl: