Discuss solar quote question - estimated return on investment timescale. in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

I agree with you, i often get asked if i want to take finance out on a car, i ask "is it less than 3.3%" - they say "No" - so i say forget it, i will pay cash.....
In the good old days of solar, i believe it actually made a return even after borrowing the money from the bank, not sure if thats still possible
 
Someone's maths seems to be a little off!
570.09+339.70+2037.50=2947.29
2947.29 x 4= £11789.16
or am I missing something?
I thought it may be a good idea to get my accountant to check the quoted figures. The first thing he spotted was exactly the same as you saw - the annual benefit compared to the 4 year payback ( actual figure 29.49% - 3 years 4 months ) With the price at £16585 the annual return must be in excess of 25% around £4200. The quoted annual benefit is only £2947?? so I will await my accountants calculations to see how this works.

With solar, it is impossible to gauge the actual return to the quoted estimated return until at least a year has passed. So are there any special terms attached to this type of purchase? Can you pursue exaggerated claims 12 months after installation?
 
Not quite a year yet but have just received my previous 12 months statement from Eon & saved the grand total of...........£187 :unamused:.

I have a spreadsheet prepared to enter the actual yield etc for a more accurate comparison. I will post it once prepared. Can I attach a spreadsheet to a post?
 
Not quite a year yet but have just received my previous 12 months statement from Eon & saved the grand total of...........£187 :unamused:.

I have a spreadsheet prepared to enter the actual yield etc for a more accurate comparison. I will post it once prepared. Can I attach a spreadsheet to a post?

Not sure about spreadsheets, but pdfs and photos deffo
 
My suspicious nose sniffs out somebody who wants to complain about miss selling....
I've had the inspector visit from Certsure. He did highlight that the quote was not to the recommended guidelines & has to be re-calculated. There are lots of known variables to be used in the generation yield calcs & all contribute to a reasonably accurate forecast.

It was agreed that the biggest factor to influence the savings is the "percentage usage". Sadly the estimated usage figure that is used is entirely at the discretion of the installer. There doesn't seem to be any accurate charts or formula for this percentage figure despite its enormous affect on the annual savings & ultimately the payback period.

Following the first full years generation it is now clear that the year following the installation saved a total of £1774.26 that includes both the reduction in the bought electricity plus the fit payments. The quoted annual savings were £2947.29 in total & equate to the actual return being 60.2% of the quote.

My next dilemma is how to calculate the amount I will be short & base any compensation on the difference. My initial thoughts are to see how much I will lose over the lifetime of the system. The quote gave a 20 year saving of £138 850.93. Using this 20 yr figure & the actual percentage return of 60.2% of the quoted figure gives an actual 20 year return of £83 587.86. This is a 20 yr shortfall of £55 263.07. So if I get no compensation this is a true reflection of the loss based on the measured output. Does anyone have any experience of how to calculate the loss over the systems 20 yr lifetime?
 
I doubt there could be any formula for calculating potential usage, it's very occupant / lifestyle /property specific.
It could only be a wild guess based on information from the occupants.
 
Even paying back the cost of an install could take about 17 years if the cost was approx £10K like it was for us, the best thing about it is you can put your yearly FIT payment (£600-ish depending on weather) towards paying the bills.

It's hard to say if it's a real win overall as that £10K is gone forever and getting replacement parts hasn't even been factored into those costs for up-keep for the foreseeable future.
 
Perhaps I should consider reinstatement as an option to compensation. This would involve steel roof repair/replacement + removal of equipment + my money back. Would this be seen as reasonable restitution?
 
Good luck trying to get any compensation. ... there seem to be faults on both sides.

Your usage could vary, the sun may not shine ......

I'm not sure what faults I have contributed to apart from being a bit too trusting.

It's true that my usage may vary & the sunlight will too, but remember the percentage usage figure was guessed by my installer.

As I mentioned before this figure is by far the most influential when converting the diligently calculated output into monetary savings.

I understand that I may well use 100% of the generation for 2/3 rds of the year, as the generation is so low. During the brighter months I may only be using 20% but this is 20% of the vast majority of my annual generation. So the percentage usage is not a simple as it seems & with my system can be nowhere near 95%.

p.s. my feedback is limited to 4kWh so the 15kWh potential in the brighter months is severely reduced, thereby reducing the fit payments.
 
Who decided a 15kwh system was the best option, was it a case of fill the roof?
And why was it capped, did they try to get FIT on 15kw?

The installer suggested that with my high usage ( no gas ) I should go for the maximum amount that I could fit on the roof. This worked out at 15kWh & they contacted the dno who were happy with it providing that it was capped to 4kWh max feeding back. I have 3 ct clamps, one from each 5kW inverter connected to my incoming live.

I do get the FIT & have to send the meter reading in every quarter. This first year I received £692 on the 15kW install.
 
Good luck trying to get any compensation. ... there seem to be faults on both sides.

Your usage could vary, the sun may not shine ......

The installer had to recalculate the potential generation as directed by the Inspector. It was found that the calcs were around 26% out so a settlement fee was agreed. This amount now gives me a payback within 4 years as quoted originally.
 
You can work this out easily using a full discounted cashflow calculation. However I wouldn't bother. If you installed simply to make money, I can make the payback period and internal rate of return what ever you like by altering the inputs to the DCF.

Remember your panels have a 30 year plus life expectancy. If you assess over this period, your purchase is a no brainer. Leave it at that and enjoy what you have.

My customers motivations for installation have moved way beyond this narrow little calculation to take in much wider considerations. They are far more interested in value rather than cost. They take pleasure from their systems, are loving life and moving forward.

As Shirley Conran said: "Life is too short to stuff a mushroom."
 

Reply to solar quote question - estimated return on investment timescale. in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock