Repost please: $1/watt solar panals.
in [Basics]
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From: nospam on 29 Oct 2009 12:33 Michael A. Terrell wrote: > nospam(a)nevis.com wrote: >> Michael A. Terrell wrote: >>> What guarantee do you have that the seller will be in business next >>> year, let alone 15 years from now? >> And the sun could snuff out tomorrow, life is chancy. With your >> viewpoint we'd all still be huddled around the fire afraid of >> the dark. There are no 100% guarantees about anything but your own >> mortality. > > > Yawn. I built a 48 VDC powered KU band communications system for the > International Space Station while working at Microdyne. Lockheed-Martin > packaged it into one of the custom rack modules and supplied the > modified remote control software to NASA. It was a modifed Microdyne > '700 Series' design. > > Cheap and long life just don't go together on batteries. If someone > actually did discover how to do it, they would own the market in a very > short time. > > Huddle all you want, around your jury-rigged toys. As far as the > fire, you might get that from you overloaded and under designed 12 volt > wiring. > > Don't tell grandma how to suck eggs. I built my first solar water heater in 1971 (the unit is still functioning) and worked on the first R-2000 homes in North America back in 1973. We built a completely off grid super insulated home in 1998/99 with Hydronic radiant floor heating, solar hot water and PV.
From: Dirk Bruere at NeoPax on 29 Oct 2009 13:54 Michael A. Terrell wrote: > Dirk Bruere at NeoPax wrote: >> Michael A. Terrell wrote: >>> nospam(a)nevis.com wrote: >>>> Michael A. Terrell wrote: >>>>> nospam(a)nevis.com wrote: >>>>>> TheM wrote: >>>>>>> "vaughn" <vaughnsimonHATESSPAM(a)gmail.FAKE.com> wrote in message news:hc7utq$1a1$1(a)news.eternal-september.org... >>>>>>>> "Don Lancaster" <don(a)tinaja.com> wrote in message news:7kooa3F39fllbU1(a)mid.individual.net... >>>>>>>>> For net energy, a quarter per peak pv watt is needed. >>>>>>>>> >>>>>>>>> Even then, it would be many years after a quarter per watt for actual breakeven, owing to all the previously lost energy. >>>>>>>>> >>>>>>>> Huh? I usually agree with Don on these things, but here he seems to be confusing energy break even with economic break even. I a >>>>>>>> perfect world they might be comparable, but I doubt if that is true in the real world. >>>>>>>> >>>>>>>> Vaughn >>>>>>> I think what he wants to say is that energy break even is many years down the road, >>>>>>> possibly decades. And fixing and maintaining it might kill the small net energy surplus. >>>>>>> And before we get to break even we might have new, much better technology. >>>>>>> >>>>>>> M >>>>>>> >>>>>>> >>>>>>> >>>>>> Who knows, but for a $1.98 a watt it's a good deal if you want to give >>>>>> it a go. I know I could run my home office off a couple of panels >>>>>> (laptop, printer etc.)Even having a couple would keep the lights on >>>>>> in an emergency. >>>>> If there is enough sun to power the lights, you don't need them. >>>>> >>>>> >>>> After 4pm six months of the year, yes I do need lights. >>> >>> The solar panels are worthless for that use without expensive, short >>> lived batteries. >> Cheap deep cycle batteries with a 15 year guarantee are available > > > What guarantee do you have that the seller will be in business next > year, let alone 15 years from now? The manufacturer is likely to be. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.theconsensus.org/ - A UK political party http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Dirk Bruere at NeoPax on 29 Oct 2009 13:55 vaughn wrote: > <nospam(a)nevis.com> wrote in message news:4ae8ff39$1(a)news.x-privat.org... >> For a laptop, printer and a couple of 15 watt compact florescent lights? >> Hardly a huge expense, with 1000watt inverters $100.00 on ebay, a couple >> of Sams' club deep cycle batteries ? > > Actually for system you don't really need inverters at all. I use > 12-volt compact florescent lamps, and 12 volt adapters are available for > laptops. I use the lamps out in my yard, and my in-home 12-volt wiring > system is slowly growing. Does a low voltage DC house supply make sense? It's looking like it for lighting. -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.theconsensus.org/ - A UK political party http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: Dirk Bruere at NeoPax on 29 Oct 2009 14:39 Josepi wrote: > Post the guarantee here so we can see what it says. > Let's see if we are allowed to actually discahrge the batteries and still > get our 1% back. http://sunelec.com/index.php?main_page=index&cPath=7 -- Dirk http://www.transcendence.me.uk/ - Transcendence UK http://www.theconsensus.org/ - A UK political party http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: vaughn on 29 Oct 2009 15:24
"Dirk Bruere at NeoPax" <dirk.bruere(a)gmail.com> wrote in message news:7ku397F3aokmiU3(a)mid.individual.net... > Does a low voltage DC house supply make sense? > It's looking like it for lighting. My system is mostly for lighting, with possibly a laptop and a portable TV thrown in during power failures. The "40-watt-equiv" 12 volt CFL's that I use draw 1 amp each. So far, the most I have on one circuit is 2 of them. For minimum voltage drop, I wire my interior circuits with #10 THHN wire. Vaughn |