Thoughts on the following solar panels quote

tunnel

Black20VT wrote: »

It was indeed a National, but not sure if we can name on here, so will play the safety first card.

I'm going to plump for s*lar king or s*lar style uk, there, that takes the onus off you. I had both out to my parents and i'll quite happily say they haven't got a clue. In fact, one of the salesmen gloated about how big his bonus would be....must be quite a few gullible people out there.
The guys and gals on here will offer up any advice you want, if your seriously looking at solar then you'll get a good start on here.


If you have someone in all day, I'd be looking at a split system, maybe 1.5kWp east and 2.5kWp west, that way when the kids are bigger you have a bigger evening splurge.


As others have said, estimated consumption is racked up to make the ROI look better. It will be much better if you can get the price down to nearer £6k.

tunnel

Black20VT wrote: »

Just to be more accurate, since 02/05/2013, our average daily usage for electricity has been 19.3 kWh. :mad:

Mine used to be around that figure, probably more. With some adjustments, changing white goods and replacing bulbs for LED's, we can take the 1 off that figure and believe you me, it puts a hell of a smile on your face.
I'm assuming you have an immersion tank too(iboost). That's an excellent way of reducing your gas usage for hot water, more so in the summer months. Some on here report 6-8 months of "free" hot water...all adds up.

zeupater

Black20VT wrote: »

Sorry, was a typo by me, but fixed a short while ago, but obviously after you'd quoted the text.

The £360.06 is based on how much energy they think we'd use...

Hi

In which case the calculation is based on using 2350 of 3176 kWh generated in house, that's 74% ...

Generation will be seasonal, therefore you'll have an excess in the summer months when you don't have a use for it .... somewhere around £100/annum saving would be more realistic, possibly more, but that's down to how you change your usage pattern to mirror generation ...

An average of 19.3kWh/day for electricity priced at 15.32p/kWh is £1080/year on electricity, that's £90/month ... add in the standing charge at say 20p/day and it becomes £96/month. If your dual fuel DD is £130/month, then gas, including standing charge would be ~£34, would work-out at around £28 usage ... that's around 700kWh/month (28/0.04), or ~8400kWh/year.

Averaged statistics suggest that the 'typical' dual fuel customer uses 3300kWh/electricity and 16500kWh/gas per year .... your usage suggests over double (7044/3300) the average electricity, but only ~half (8400/16500) of the average gas, which suggests something atypical is happening (gas available but low usage + some electric heating ?), or there's an error in the average electricity usage you're working on ....

HTH
Z

tunnel

I think that 15.32p per kWh is a tad high personally. My fix is 11.43p + SC which with my usage would equate to around 13.5p a kWh. If they're using 19.3 units daily that rate would probably be nearer 12.5p inc SC which would be around £880 a year or just over £73 a month

jimjames

tunnel wrote: »

I think that 15.32p per kWh is a tad high personally. My fix is 11.43p + SC which with my usage would equate to around 13.5p a kWh. If they're using 19.3 units daily that rate would probably be nearer 12.5p inc SC which would be around £880 a year or just over £73 a month

The other thing to watch out for is that some suppliers use recent price rises to extrapolate for the next 25 years. At the time of our install the price had just risen about 15%. Imagine how that affects the 25 year payback if you assume electricity rises by 15% pa over that time. The salesman didn't seem to understand that the cost of electricity would be 10x anyone's salary on that basis.

zeupater

tunnel wrote: »

I think that 15.32p per kWh is a tad high personally. My fix is 11.43p + SC which with my usage would equate to around 13.5p a kWh. If they're using 19.3 units daily that rate would probably be nearer 12.5p inc SC which would be around £880 a year or just over £73 a month

Hi

I tend to agree it's high, but that's the figure which was included in the calculations ....

Black20VT wrote: »

Energy Used = 2,350.24 kWh x 15.32p = £360.06

.... I looked on a comparison website a few days ago and most of the more competitive electricity offerings around here were currently around the 14p/kWh mark plus standing charge .... we're paying more/unit, but with a zero standing charge we make a small annual saving on electricity and, with no need to heat DHW for the majority of the year, a pretty decent saving on gas (Note: at our low consumption levels and usage pattern!) ...

HTH
Z

Vomityspice

tunnel wrote: »

Mine used to be around that figure, probably more. With some adjustments, changing white goods and replacing bulbs for LED's, we can take the 1 off that figure and believe you me, it puts a hell of a smile on your face.
I'm assuming you have an immersion tank too(iboost). That's an excellent way of reducing your gas usage for hot water, more so in the summer months. Some on here report 6-8 months of "free" hot water...all adds up.

Perhaps I'm just mean but currently we are using less than 6kwh per day??? ( 4 bed detached house) All bulbs are LED and most of the appliances A rated. I thought that was high? About to try out Tado heating control and the windows (wooden) changed to A rated upvc. Not convinced our Iboost is working correctly either yet.....

I'm hoping to get our energy bills to less than £69 per month. In March we spent £78.....

tunnel

Hi VS,
Do you have someone in the house all day? I have a wife who hasn't quite grasped the concept of 1 appliance at a time in fair weather and 2 at a time(all A rated or better) when its sunny, only had the panels in for just over 2 1/2 years as well


My energy supplier has just dropped my dual fuel payment to £91 a month(used to be £135 before panels)

Vomityspice

Both at work all day, and partner trained to use the delay start buttons on the dishwasher, tumble dryer and washing machine!!

Currently with Ovo so pay just under 11p for electric and 3.5 for gas.

Whizzy heating control system should be delivered tomorrow, and Tado are claiming £10 a month cost saving.... We will see! Just need to install it over the weekend.

Martyn1981

zeupater wrote: »

Hi

An average of 19.3kWh/day for electricity priced at 15.32p/kWh is £1080/year on electricity, that's £90/month ... add in the standing charge at say 20p/day and it becomes £96/month. If your dual fuel DD is £130/month, then gas, including standing charge would be ~£34, would work-out at around £28 usage ... that's around £700kWh/year(28/0.04).

Averaged statistics suggest that the 'typical' dual fuel customer uses 3300kWh/electricity and 16500kWh/gas per year .... your usage suggests over double (7044/3300) the average electricity, but only 4.2% (700/16500) of the average gas,

HTH
Z

Hiya Z, I followed this until you said 700kWh/year. Shouldn't that be per month? In which case it starts to look a bit more normal in the 8,000kWh+ range per year.

@Black20VT 19.3kWh per day is high, so you certainly have room to lower that. Our consumption before PV was ~3,000kWh, now it's ~ 1,600kWh, but depends a lot on the month and generation. Dec and Jan were 200kWh, then it drops sharply with 156 in Feb, and 122 in Mar. Last summer Apr to Aug were 122, 80, 78, 75 & 94 before rising back up as generation fell off.

The more you use, the more you can **potentially** save, but consumption and generation have to line up at the same time, so take the leccy savings figures from the salesmen with a large pinch of salt.

Mart.