Posted by jim on December 7, 2008, 6:10 pm
//
> Well, in the case of my house's UPS, that's 24 volts at 1000 amp-hours.
that is (assuming you can drain the last drop out of the battery)
2.4KWhr - a perfectly valid emergency supply
I got
> the 20 AGMs as a matched but used set as scrap from an AVS electric bus
> battery pack.
and you have it bunded - ie it is in your cellar.
& it is NOT the Heath Robinson brew suggested by the wiki article.
//
> Well, this whole thread is silly and those of us who can do simple math are
> just funning around. Anyone who thinks that they're going to supply their
> house with 20kWh of wind power on a daily basis cheaper than the utility power
> is smoking something MIGHTY FINE!
Oh yes? There's loads of idiots out there, including govt ministers
and advisers and civil servants, who obviously cannot do the simple
sums & do not think it is a silly idea. And they are right there in
the middle of govt putting up all of our elec bills.
The daft idea has got out that wind energy is 'free' and all you do is
put up a fan, plug it into the mains and lie back whilst the cheques
roll in. It is perhaps inexhaustable, but is it truly renewable? The
expected life of a wind turbine is c.30years. Not very long as
electrical generation infrastructure goes. Plus there is a large plug
of expensive-energy-consumed concrete under it.
Posted by Andy Burns on December 7, 2008, 6:21 pm
jim wrote:
>
>> in the case of my house's UPS, that's 24 volts at 1000 amp-hours.
>
> that is (assuming you can drain the last drop out of the battery)
> 2.4KWhr - a perfectly valid emergency supply
24kWh, more than a days worth for most homes, especially if you realise
it's an emergency and can cut down on usage to make it last.
Posted by Neon John on December 8, 2008, 3:59 am
wrote:
>jim wrote:
>>
>>> in the case of my house's UPS, that's 24 volts at 1000 amp-hours.
>>
>> that is (assuming you can drain the last drop out of the battery)
>> 2.4KWhr - a perfectly valid emergency supply
>24kWh, more than a days worth for most homes, especially if you realise
>it's an emergency and can cut down on usage to make it last.
Correct. In an experiment, I made it a week and didn't drop below 80% DOD.
Now I did cheat and turn on utility power to heat water to shower with but the
charger was off and all my vital bus lighting was still on the UPS. Doing
without a shower for a week is more than I'm willing to sacrifice for an
experiment.
In a real emergency I would probably run the genny every other day to shower
and refill my water tank. My stove is electric but I have a Coleman 3 burner
stove in my summer (outdoors) kitchen and then there's the stove in the
motorhome. (gotta get that well pump on the UPS!) Otherwise, a week would be
no problem at all. Especially in the winter when I can roll my chest freezers
outside. I mounted them on wheels for that purpose.
John
--
John De Armond
See my website for my current email address
http://www.neon-john.com
http://www.johndearmond.com <-- best little blog on the net!
Tellico Plains, Occupied TN
Vegetarian - Indian word for "poor hunter".
Posted by me on December 8, 2008, 10:16 pm
>Especially in the winter when I can roll my chest freezers
>outside. I mounted them on wheels for that purpose.
What brand/model chest freezers you have?
Posted by Neon John on December 9, 2008, 10:29 am
On Mon, 08 Dec 2008 21:16:12 -0600, me@privacy.net wrote:
>>Especially in the winter when I can roll my chest freezers
>>outside. I mounted them on wheels for that purpose.
>What brand/model chest freezers you have?
Yard sale specials. Why, what features are you interested in? My wheels
consist of 1 and 2 (for the larger freezer) furniture movers, those wooden
platforms with 4 casters mounted on the corners. I'd need something better
if the surface was at all rough but this does fine on concrete.
John
--
John De Armond
See my website for my current email address
http://www.neon-john.com
http://www.johndearmond.com <-- best little blog on the net!
Tellico Plains, Occupied TN
You can't turn [MS] shovelware into reliable software by patching it a whole
lot. -Marcus Ranum
XML site map