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-   -   Economic prospects for solar photovoltaic power (https://www.mersenneforum.org/showthread.php?t=16770)

chalsall 2018-06-25 22:29

[QUOTE=Uncwilly;490543]I looked at the rebates and tax credits for Texas and the system might be nearly free.[/QUOTE]

Cool. Seriously.

It's good that the Government subsidize Solar, much like they do burning carbon, particularly in warm places. Here in Binshire there's a high correlation between noon and heavy draw. Air-conditioning, anyone?

VBCurtis 2018-06-25 22:59

[QUOTE=Uncwilly;490543]So, it looks like solar panels might get as cheap as [URL="https://www.renewableenergyworld.com/articles/2018/06/solar-prices-nosedive-after-china-pullback-floods-global-market.html"]24 cents per watt[/URL] by the end of the year.

$0.24/w * 5000 = $1200
That is the size of a nice home system.
Let's set the of the other hardware (inverters, etc.) and add just as much for the install labour. That is $3600.

I looked at the rebates and tax credits for Texas and the system might be nearly free.[/QUOTE]

Summer 2016 I installed a 7.3kW system on my house. Non-panel costs were just over $10,000. Your estimate of $2400 for these costs is more than a bit optimistic, though my system was large enough to require a new 200-amp electrical panel (house originally had 100); perhaps $1/watt in install and inverter costs is possible with a competitive/cheap contractor.

kladner 2018-06-26 01:53

:popcorn:
No sarcasm intended. This discussion is well worth watching.I feel the same way about Air Squirrels' mentions of a solar powered data center.

M344587487 2018-06-26 14:49

[QUOTE=VBCurtis;490553]Summer 2016 I installed a 7.3kW system on my house. Non-panel costs were just over $10,000. Your estimate of $2400 for these costs is more than a bit optimistic, though my system was large enough to require a new 200-amp electrical panel (house originally had 100); perhaps $1/watt in install and inverter costs is possible with a competitive/cheap contractor.[/QUOTE]

Small scale the costs are much worse for panels, and much better for non-panel costs (I'm talking around a kilowatt or less, you can possibly get away with as little as a DIY lead-acid bank and inverters depending on what you're doing). I'm inclined to believe that the 24 cents per watt figure is the raw cost of a fraction of a cell before it's been packaged as a panel, even taking into account a big installation that seems way too low for the UK at least. What may I ask was the cost per watt of your big installation for just the panels, ignoring all other costs? I'm assuming America before tax? I'm always curious as figures I find online always seem way off to what I see. My UK small scale figures are ~$1.20/watt for panels, large scale I have no experience with but assume they must be much cheaper.

VBCurtis 2018-06-26 15:20

The system was nearly 50-50 panel vs non panel costs, total expense before USA government kickbacks $21000. Contract was signed Feb 2016.

26 panels, 7300 watts rated. I don't recall the brand nor exact rating. $10,200 panel cost.

M344587487 2018-06-26 15:46

[QUOTE=VBCurtis;490610]The system was nearly 50-50 panel vs non panel costs, total expense before USA government kickbacks $21000. Contract was signed Feb 2016.

26 panels, 7300 watts rated. I don't recall the brand nor exact rating. $10,200 panel cost.[/QUOTE]

Thank you. It's surprising my small scale figures are anywhere near competitive, although we're talking cheap brands and no doubt less efficient or durable compared to your proper solution (honestly I wouldn't be surprised if my figures are peak and yours are average or something like that, I've never had need to measure).


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