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Solar pv and other domestic micro-generation technologies

30 watchers
rf_fozzy
rf_fozzy
Nov 2023
1:01pm, 8 Nov 2023
21,055 posts
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rf_fozzy
I presume the 10+ roi is a pure financial calculation on electricity prices and doesn't factor in other externalities.

My roi is 7-10yr on my installation.

I took that and then looked at how many tonnes of co2 this saves etc as well.

To me, a pure financial calculation misses some of the other factors.

I mean we don't go round our day to day lives always looking to minimise our spend - we do buy trivial stuff for decoration, for example.
HappyG(rrr)
HappyG(rrr)
Nov 2023
1:02pm, 8 Nov 2023
48,376 posts
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HappyG(rrr)
Those calculations sound right jacdaw. It's not that it won't meet your *electrical* needs, but that it isn't the right financial case that you would like, is that right? Ours might be a 10 year ROI too. But I'm OK with that for what I see as the other, non-financial benefits.
HappyG(rrr)
HappyG(rrr)
Nov 2023
1:02pm, 8 Nov 2023
48,377 posts
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HappyG(rrr)
x-post with fozzy, saying pretty much same thing.
rf_fozzy
rf_fozzy
Nov 2023
1:04pm, 8 Nov 2023
21,056 posts
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rf_fozzy
Also I think a 10yr roi isn't bad! I don't see why that's stopping anyone.

I could make comments about older generations who are worried that they not see returns, but who have the money by virtue of being born sooner, but won't spend it and their general **generational** inaction towards climate change and draw conclusions, but I won't.
rf_fozzy
rf_fozzy
Nov 2023
1:05pm, 8 Nov 2023
21,057 posts
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rf_fozzy
Sorry, I get a little cross in that space.
rf_fozzy
rf_fozzy
Nov 2023
1:14pm, 8 Nov 2023
21,058 posts
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rf_fozzy
(and before I'm accused of it,I'm not having a go at any one particular person - I don't know their individual circumstances. My comments are as a population scale.)
Snail
Snail
Nov 2023
1:16pm, 8 Nov 2023
2,443 posts
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Snail
Thanks for those links. I'll have a look this evening and see how compares to the rough high level (pre survey) numbers that we have been sent
jda
jda
Nov 2023
1:20pm, 8 Nov 2023
15,825 posts
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jda
I'd love a 10y ROI! Assuming that really does cover all the foreseeable costs (maintenance?) it would be a no-brainer for me. However once you're down at 20y it's questionable.
jacdaw
jacdaw
Nov 2023
2:20pm, 8 Nov 2023
4,125 posts
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jacdaw
I'm genuinely wondering if the money invested in a rooftop PV system might generate greater environmental good if invested in larger projects in more optimal sites.

Granted, I wouldn't get the virtue signalling.

No point in chucking money away Fozzy, if it ultimately isn't doing much good.
rf_fozzy
rf_fozzy
Nov 2023
2:27pm, 8 Nov 2023
21,059 posts
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rf_fozzy
" if it ultimately isn't doing much good."

*facepalm*

About This Thread

Maintained by ThorntonRunner
Every so often we talk about solar pv, batteries etc split across the environment, energy bills and electric car threads. Here's a dedicated home for such discussion :)
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