Worked out the benefits of 4Kwp PV array.

£ Electricity.

Outlay for 3.88Kwp PVpanel……….....………….£14,000
Cost of imported electricity………….....……………..£509
FIT Money received from PV electricity generated...£1800
Money saved by using free PV electricity………………£130
Total income if tax is taken into account………………£2570
Return on capital………………………………………...18%

Annual electricity balance. Post PV installation.

Electricity imported from mains…………………...3100Kwh
PV Power generated in year 2011….....…………...4010Kwh
Power used from PV……………………………..….810Kwh
Total power consumed (PV+mains)…….…………3910Kwh
Exported power ……………………………………3200Kwh
Net export……………………………………...…….100Kwh

The split on power used from the PV panel was derived from comparing
pre and post PV installation annual electricity consumption.

On Jun 24, 4:16*pm, John Rumm <see.my.signat...@nowhere.null> wrote:
> On 24/06/2012 11:12, harry wrote:
>
> > Worked out the benefits of 4Kwp PV array.
>
> > £ Electricity.
>
> > Outlay for 3.88Kwp PVpanel……….....………….£14,000
> > Cost of imported electricity………….....……………..£509
> > FIT Money received from PV electricity generated...£1800
> > Money saved by using free PV electricity………………£130
> > Total income if tax is taken into account………………£2570
> > Return on capital………………………………………...18%
>
> You forgot depreciation on the capital assets....
>
> What would a 3.88kW (what's a Kwp?) cost today?
>

kilowatt peak.

Don't forget repair costs.


NT

On Jun 24, 7:27*pm, NT <meow2...@care2.com> wrote:
> On Jun 24, 4:16*pm, John Rumm <see.my.signat...@nowhere.null> wrote:
>
>
>
>
>
> > On 24/06/2012 11:12, harry wrote:
>
> > > Worked out the benefits of 4Kwp PV array.
>
> > > £ Electricity.
>
> > > Outlay for 3.88Kwp PVpanel……….....………….£14,000
> > > Cost of imported electricity………….....……………..£509
> > > FIT Money received from PV electricity generated...£1800
> > > Money saved by using free PV electricity………………£130
> > > Total income if tax is taken into account………………£2570
> > > Return on capital………………………………………...18%
>
> > You forgot depreciation on the capital assets....
>
> > What would a 3.88kW (what's a Kwp?) cost today?
>
> kilowatt peak.
>
> Don't forget repair costs.
>
> NT- Hide quoted text -
>
> - Show quoted text -

5yr guarantee, so should have paid for itself. (If they still exist)
Cost of components seems to be in free fall.

On Jun 24, 4:16*pm, John Rumm <see.my.signat...@nowhere.null> wrote:
> On 24/06/2012 11:12, harry wrote:
>
> > Worked out the benefits of 4Kwp PV array.
>
> > £ Electricity.
>
> > Outlay for 3.88Kwp PVpanel……….....………….£14,000
> > Cost of imported electricity………….....……………..£509
> > FIT Money received from PV electricity generated...£1800
> > Money saved by using free PV electricity………………£130
> > Total income if tax is taken into account………………£2570
> > Return on capital………………………………………...18%
>
> You forgot depreciation on the capital assets....
>
> What would a 3.88kW (what's a Kwp?) cost today?

Cost now would be £7000-£8000 depending on how much scaffolding
required.
I have seen "frommers" advertising 4Kwp for £6000

Dunno how long to write it off over. !0yrs?
It allegedly has a 25 year life minimum. So knock a grand off a year?

But then there's inflation and no interest at the bank.

But the price of electritcity will go up and the FIT is inflation
linked. Went up two point something % last April.

Does my 'ead in.