solar panel power generation

Happy_Sloth

hosay299 said:

QrizB said:

Happy_Sloth said:

19 x 395watt  panels totalling a 7.5KW system.  this company have said there is no point getting a battery on day 1 as chances are given our high daytime usage we wouldn't fill it. They suggested, it's better to monitor usage and export over the first year and adding a battery later if we find we are exporting a lot. 

That's a good-sized system and better advice re. battery.

I've done the math... i think it would bring the energy bill down by about £70 per month, granted taking 11 years to get ROI  (At todays prices 21p per unit) 

This suggests a price of around £9k for the system, perhaps a little more?

whats the cost for just the normal system with out the Battery

Sorry yes the cost is £7100 and this is our forever home.  

Martyn1981

Ideally, if it's a single roof install, I'd have hoped for a sub £7k price, maybe closer to £6k, but it does seem like prices are high at the moment.

Look like a nice package, and good advice on the battery.

1961Nick

Why not set a target price, say £6000, & then get quotes for the maximum kWp from that sum? If you’ve got plenty of real estate on your roof, more lower output panels might be a cheaper option than getting the latest technology.

JKenH

Verdigris said:

I'm sure my mother would approve of me going on cruises, too. However, I have a responsibility to her grandchildren and great grandchildren to leave an inhabitable planet. I think it is perfectly ethical to ignore the wishes of somebody, who perhaps hasn't given enough thought to the future, to mitigate the damage done by their generation.

Not sure I agree with that. I don’t know anything about your mother but if she was like mine she had a heck of a lot tougher life than I have had and if she caused any damage to the environment by enjoying her later years I wouldn’t criticise her for it. Was your mother even aware she was damaging the environment?

I suspect our generation with our massively higher levels of consumption has done far more damage and for the last 20 years or so at least we have been aware of that. My mum never had electricity or running water until the 1950s, never had gas and it wasn’t until she was 65 she had central heating. My parents generation, for much if not all of their working lives, walked or cycled to work. Let’s not be so hard on them.

Last night I happened to watch Cider with Rosie, whose author Laurie Lee’s life (1914 to 1997) coincided with that of my parents generation. Just watch something like that and you will realise the hardship that generation had to put up with. 

I expect it of generation Z to disrespect the older generations - that is the role of the young - but as we grow older we gain a more balanced understanding of the world we grew up in.

So if I were the OP I would respect my father’s wishes and do something special with the money. Solar panels would be a fitting memorial and everytime the sun shines it will be a fond reminder.

Happy_Sloth

Martyn1981 said:

Ideally, if it's a single roof install, I'd have hoped for a sub £7k price, maybe closer to £6k, but it does seem like prices are high at the moment.

Look like a nice package, and good advice on the battery.

Oops!  i totally misread the quotation.  It's actually £7100 (which is not anything like £9900... i don't know how i got that figure in my head!)  

Which i think makes the ROI 

£7100/ £70 =  101 Months /12 = 8.4 years.  

silverwhistle

If you have an immersion tank don't forget you could get a diverter for surplus energy and supply much/most of your hot water from March to October. I've averaged 2kWh a day over the last week and as a single person find I don't use the gas boiler at all March to October (with 4kWp of panels).

Notional savings could go towards a holiday fund and might be a more satistying spend than getting rid of your capital in one splurge or keeping the money in the bank for no interest..

hosay299

and can u say what it is for and what type of system they are quoting for as i do a local company near me does them and am thinks of asking for one but would like as much info as posable to compare ??

we one person at home all the time and me who works up 30 hours a week.

hosay299

Happy_Sloth said:

Martyn1981 said:

Ideally, if it's a single roof install, I'd have hoped for a sub £7k price, maybe closer to £6k, but it does seem like prices are high at the moment.

Look like a nice package, and good advice on the battery.

Oops!  i totally misread the quotation.  It's actually £7100 (which is not anything like £9900... i don't know how i got that figure in my head!)  

Which i think makes the ROI 

£7100/ £70 =  101 Months /12 = 8.4 years.  

u can delete post with the incorrect info just click the symbol on top right

hosay299

silverwhistle said:

If you have an immersion tank don't forget you could get a diverter for surplus energy and supply much/most of your hot water from March to October. I've averaged 2kWh a day over the last week and as a single person find I don't use the gas boiler at all March to October (with 4kWp of panels).

Notional savings could go towards a holiday fund and might be a more satistying spend than getting rid of your capital in one splurge or keeping the money in the bank for no interest..

so u Mean send it back to the grid ??

QrizB

Happy_Sloth said:

Martyn1981 said:

Ideally, if it's a single roof install, I'd have hoped for a sub £7k price, maybe closer to £6k, but it does seem like prices are high at the moment.

Look like a nice package, and good advice on the battery.

Oops!  i totally misread the quotation.  It's actually £7100 (which is not anything like £9900... i don't know how i got that figure in my head!) 
Which i think makes the ROI
£7100/ £70 =  101 Months /12 = 8.4 years. 

That's better.

• 3880kWh used @ 21p/kWh = £815
  
• 2600kWh exported @ 7.5p/kWh = £195

so:

• Total annual return = £1010
• Payback period = 7 years, 25-year ROI = 5.2%

Definitely better.

I would be slightly cautious about the realism of you using 60% of your generation; it seems quite high. In June or July, for example, you might generate 45kWh in a single day and only be able to use 15kW of it.