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Old 2011-12-16, 14:38   #12
em99010pepe
 
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Originally Posted by fivemack View Post
Life expectation of raw panels is 25 years, and I was using the £5 figure which includes installation, connection and warranty rather than the £2 figure for the panels alone.
Life expectation is less, believe me, I work in the area.
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Old 2011-12-16, 17:19   #13
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Yeah, the life expectation of solar panels isn't that high indeed.
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Old 2011-12-16, 19:00   #14
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I recently noticed on my power bill that I pay double for power at 6 pm, 22 cents/KWH, compared to other times that are 11 cents/KWH. They charge different hourly rates throughout the 24 hour cycle, with those being the high and low. I know storage via batteries is a costly proposition but I wonder if using them to provide compute power at those peak-rate times would pay for itself in a reasonable period. They could be charged by solar or the local utility. I too spend a lot on power for GIMPS, more than the cost of the computers themselves.
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Old 2011-12-16, 19:19   #15
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Quote:
Originally Posted by stars10250 View Post
I recently noticed on my power bill that I pay double for power at 6 pm, 22 cents/KWH, compared to other times that are 11 cents/KWH. They charge different hourly rates throughout the 24 hour cycle, with those being the high and low. I know storage via batteries is a costly proposition but I wonder if using them to provide compute power at those peak-rate times would pay for itself in a reasonable period. They could be charged by solar or the local utility. I too spend a lot on power for GIMPS, more than the cost of the computers themselves.
Here we also have that possibility, one price for all hours or two prices for different hours and even three prices for three ranges of hours. You need to make some calculations about what equipments you have consuming and at hours to see which one is more beneficial. What I did was to know what equipments are usual on, like the frig...and the ones you turn on occasionally, like the wash machine, oven, etc You need to play with all those things to be sure to choose the right regime of payment.


By the way, a small correction, it's kWh and KWh. k of kilo and not K of Kelvin (temperature).
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Old 2011-12-16, 20:14   #16
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Quote:
Originally Posted by stars10250 View Post
I recently noticed on my power bill that I pay double for power at 6 pm, 22 cents/KWH, compared to other times that are 11 cents/KWH.
I too am on a staged-rate scheme ('Economy Seven'); there's a standing charge of about £120 per year, then 16.1p per kWh for seventeen hours per day and 5.9p per kWh for the other seven. It's designed for people with electric storage heaters, but it seemed when I did the sums to be the best deal (13.1p/kWh) for people with a constant 24/7 load.
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Old 2011-12-17, 00:46   #17
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Quote:
Originally Posted by pinhodecarlos View Post
Here we also have that possibility, one price for all hours or two prices for different hours and even three prices for three ranges of hours. You need to make some calculations about what equipments you have consuming and at hours to see which one is more beneficial. What I did was to know what equipments are usual on, like the frig...and the ones you turn on occasionally, like the wash machine, oven, etc You need to play with all those things to be sure to choose the right regime of payment.


By the way, a small correction, it's kWh and KWh. k of kilo and not K of Kelvin (temperature).
By the way, a small correction, it's equipment and not equipments. "Equipment" is both a plural noun and a singular noun.
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Old 2011-12-17, 01:39   #18
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Originally Posted by retina View Post
By the way, a small correction, it's equipment and not equipments. "Equipment" is both a plural noun and a singular noun.
Don't you just love the English language?
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Old 2011-12-17, 01:59   #19
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"I recently noticed on my power bill that I pay double for power at 6 pm, 22 cents/KWH, compared to other times that are 11 cents/KWH."

Sheesh! And I was feeling put upon by a 7.7xx cents rate. (I don't remember the last two digits. It would round to 7.8 anyway.
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Old 2011-12-17, 05:34   #20
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I'm an engineering hacker...the price of solar panels is becoming competitive with the $1 per installed watt for thermal power generation.

The ultimate GIMPS hacked installation would be solar panels feeding into some part of the DC power system that operates the GIMPS computer(s), and GIMPS runs in proportion to the available solar power.

This saves all the cost (in semiconductors and filters and backfeed control) associated with trying to generate AC, and it makes maximal use of the solar power.

Not that it will be cheaper than simply plugging in the computer, but it won't be *too* expensive, and it will produce a pleasing result.

Now, maybe I ought to ask if it's practical to get my hot water from my roof, which I do own...it freezes here, and it's been a year since I've been up there to clean the gutters, which need it.
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Old 2011-12-17, 07:10   #21
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Quote:
Originally Posted by Christenson View Post
I'm an engineering hacker...the price of solar panels is becoming competitive with the $1 per installed watt for thermal power generation.

The ultimate GIMPS hacked installation would be solar panels feeding into some part of the DC power system that operates the GIMPS computer(s), and GIMPS runs in proportion to the available solar power.

This saves all the cost (in semiconductors and filters and backfeed control) associated with trying to generate AC, and it makes maximal use of the solar power.

Not that it will be cheaper than simply plugging in the computer, but it won't be *too* expensive, and it will produce a pleasing result.

Now, maybe I ought to ask if it's practical to get my hot water from my roof, which I do own...it freezes here, and it's been a year since I've been up there to clean the gutters, which need it.
Cool concept on the self-regulating solar GIMPS station.

On the solar/thermal panels, I think you can use anti-freeze in the exposed parts, and run it through a heat exchanger. Does your roof get buried in snow? Face a convenient direction for solar rays?
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Old 2011-12-17, 09:20   #22
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Quote:
Originally Posted by retina View Post
By the way, a small correction, it's equipment and not equipments. "Equipment" is both a plural noun and a singular noun.
Thank you for the correction, English is not my native language and therefore I appreciate your note. SI units are universal.
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