Considering solar PV installation

gm624

Update: DNO sign-off provided (no export limitation required), and scaffolding is up, ready for installation of the panels on Monday.

Martyn1981

No limitation!!!!! Grumble, grumble - These nubies come along with their high efficiency panels, giant systems, and no capping ...... they don't know they're born I tell you. Back in my day ..... grumble grumble, moan, moan.  

I'm just jealous mate, well done, and enjoy moving into the future.  

gm624

I'd still swap it for FIT though!

gm624

And it's all installed and commissioned! First full day's production (if I've got the sums right) of 0.15 O.
On that basis I'm currently expecting to recoup my investment in approximately 110 years' time 😉. Tomorrow should be better...

Exiled_Tyke

gm624 said:

And it's all installed and commissioned! First full day's production (if I've got the sums right) of 0.15 O.
On that basis I'm currently expecting to recoup my investment in approximately 110 years' time 😉. Tomorrow should be better...

My best late spring day makes about 20 times what a good mid December day makes.  I have plenty of December days were production is close to, if not zero!

EricMears

gm624 said:

And it's all installed and commissioned! First full day's production (if I've got the sums right) of 0.15 O.
On that basis I'm currently expecting to recoup my investment in approximately 110 years' time 😉. Tomorrow should be better...

Afraid nobody generates very much in December !  I don't even bother checking each day although when I did a week's worth of daily data a couple of days ago I seemed to have been earning more (from FIT of course) than I would have got in interest if we'd left the cash in an ISA.  And as ET suggests,  a good day in May can be worth more than the whole month of December.

And just to make you even more jealous,  FIT receipts fully covered installation costs over two years ago and I'll still be be collecting them for another 14 years. 

tim_p

EricMears said:

Afraid nobody generates very much in December !  I don't even bother checking each day although when I did a week's worth of daily data a couple of days ago I seemed to have been earning more (from FIT of course) than I would have got in interest if we'd left the cash in an ISA.  And as ET suggests,  a good day in May can be worth more than the whole month of December.

Seriously?  My December totals are usually around 80kWh whereas I’ve never gone above 30kWh in a day in any month. Either I’ve got a really good Dec total or other peoples are really bad.

Martyn1981

tim_p said:

EricMears said:

Afraid nobody generates very much in December !  I don't even bother checking each day although when I did a week's worth of daily data a couple of days ago I seemed to have been earning more (from FIT of course) than I would have got in interest if we'd left the cash in an ISA.  And as ET suggests,  a good day in May can be worth more than the whole month of December.

Seriously?  My December totals are usually around 80kWh whereas I’ve never gone above 30kWh in a day in any month. Either I’ve got a really good Dec total or other peoples are really bad.

It's the fun of PV. In Eric's case he has shallow pitch panels, so a small annual reduction in total gen, but the losses concentrated in the winter. I'm the same with E/W split, about a 15-20% annual loss v's south facing, but again concentrated into the winter when the panels don't 'see' the sun.
Then there's the opposite, where you have steep panels, say 50d to 60d. Again only a small annual loss, perhaps 5%, but this works to the benefit of household demand, with say a 10% reduction in the summer, and a 20% boost in the winter.

Lots of fun. And our Dec target is a whopping 79kWh., but we have hit 34kWh in a single day in the summer.

tim_p

Martyn1981 said:

tim_p said:

EricMears said:

Afraid nobody generates very much in December !  I don't even bother checking each day although when I did a week's worth of daily data a couple of days ago I seemed to have been earning more (from FIT of course) than I would have got in interest if we'd left the cash in an ISA.  And as ET suggests,  a good day in May can be worth more than the whole month of December.

Seriously?  My December totals are usually around 80kWh whereas I’ve never gone above 30kWh in a day in any month. Either I’ve got a really good Dec total or other peoples are really bad.

It's the fun of PV. In Eric's case he has shallow pitch panels, so a small annual reduction in total gen, but the losses concentrated in the winter. I'm the same with E/W split, about a 15-20% annual loss v's south facing, but again concentrated into the winter when the panels don't 'see' the sun.
Then there's the opposite, where you have steep panels, say 50d to 60d. Again only a small annual loss, perhaps 5%, but this works to the benefit of household demand, with say a 10% reduction in the summer, and a 20% boost in the winter.

Lots of fun. And our Dec target is a whopping 79kWh., but we have hit 34kWh in a single day in the summer.

My actual Dec target  is a similarly whopping 85 kWh, 16 panels spread over 3 roofs, 30 degree pitch, it’s the idea that a May day can equal that Dec monthly total that I’m struggling with!

EricMears

tim_p said:
Seriously?  My December totals are usually around 80kWh whereas I’ve never gone above 30kWh in a day in any month. Either I’ve got a really good Dec total or other peoples are really bad.

Well perhaps a slight exaggeration     "Two and a bit good days in May can be better than a below average December" didn't seem quite as punchy.

 PVGIS suggests that I ought to expect 87 kWh in Dec and 457kWh in May (only 15kWh/day average but a good day might well be twice average).  However,  that doesn't allow for having ten consecutive days with no generation when panels covered with snow that didn't fall off (mercifully not a regular problem)