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SubjectInstalling Solar Panels on my house new Reply to this message
Posted byn2locarz
Posted on06/24/09 02:55 PM



I couldn't have picked a worse time to install these damn things. It's over 100 right now and humid as hell. Not to mention monsoon's are starting. Getting the solar guys to commit has been a big issue. Doing most of the install myself to save cash. It will all pay off though.

n2




SubjectWhat kind of % of power are you getting out of it new Reply to this message
Posted bySilentAce
Posted on06/24/09 05:23 PM



Is it trying to be a full on replacement and then trickle the extra power back into the grid for money? Or is this just a supplemental power? Curious because i thought its a good idea, just don't know anyone to actually do it

> I couldn't have picked a worse time to install these damn things. It's over 100
> right now and humid as hell. Not to mention monsoon's are starting. Getting
> the solar guys to commit has been a big issue. Doing most of the install myself
> to save cash. It will all pay off though.
>
> n2
>





Subjecthere are some details new Reply to this message
Posted byn2locarz
Posted on06/24/09 10:50 PM



I purchased a 3k system. I have 40 panels total. Each panel is rated at approx 70 watts. The panels produce DC power that runs into the inverter. I got the Xantrex GT3.8. That is fed into the power coming into the house. The way it works is it should suppliment my power usage. I am currently paying a flat fee of $170 a month. The solar should drop the price to about $75-100 a month. Of course I won't know until it up and running.

n2




SubjectOne doubt... new Reply to this message
Posted byDeath Knight
Posted on06/25/09 04:47 AM



When you say the rated output is 70watts per panel, is that monthly, dayly?
And waht state are you in? Does the efficiency deppend or just varies with direct/indirect exposure?

I thing it's a great investment, but down here, the most we see is solar-heated water tanks for the shower, and also, only in reeeally sunny cities in the country.

All work and no play makes me..., well, you know the rest.


SubjectI believe... Reply to this message
Posted bysphincter
Posted on06/25/09 05:52 PM



> When you say the rated output is 70watts per panel, is that monthly, dayly?

Been awhile since I checked, but IIRC they're rated in W/h. 40 panels @ 70W apiece = 2.8kW/h peak. Makes sense since most people use them to pump power back into the grid, and the power consumed from the grid is usually measured in kW/h.

> I thing it's a great investment, but down here, the most we see is solar-heated
> water tanks for the shower, and also, only in reeeally sunny cities in the
> country.

Agreed. When I was living in Southern California, I was in a top-floor apartment that faced East and had no crawlspace between the ceiling and roof. The DWP where I was billed its customers on a bi-monthly basis, so in the summer it wasn't unusual to have a $500-$600 electric bill because I had to run the A/C all day (pets).

I went to the management company with a proposal to install solar panels on the roof: the idea was that all tenants' and common areas power would receive an equal share of the panels' output. What I didn't tell them was that the real benefit would be to the people on the top floor, whose electric bills would be slashed dramatically just by the shade they'd provide to the roof. Not that it mattered; they weren't interested anyway.

Frined of mine with a place out in the Mojave Desert (near 29 Palms) has solar panels & storage batteries on his property out there. Works well for him, but then it's literally 800 sq. ft. and only used on weekends.




SubjectYou are correct new Reply to this message
Posted byn2locarz
Posted on06/26/09 01:17 PM



> > When you say the rated output is 70watts per panel, is that monthly, dayly?
>
> Been awhile since I checked, but IIRC they're rated in W/h. 40 panels @ 70W
> apiece = 2.8kW/h peak. Makes sense since most people use them to pump power
> back into the grid, and the power consumed from the grid is usually measured in
> kW/h.

This is something I only recently learned. My electric bill is written in Greek and I can't make heads or tails from looking at my meter.

>
> > I thing it's a great investment, but down here, the most we see is
> solar-heated
> > water tanks for the shower, and also, only in reeeally sunny cities in the
> > country.
>
> Agreed. When I was living in Southern California, I was in a top-floor
> apartment that faced East and had no crawlspace between the ceiling and roof.
> The DWP where I was billed its customers on a bi-monthly basis, so in the summer
> it wasn't unusual to have a $500-$600 electric bill because I had to run the A/C
> all day (pets).
>
> I went to the management company with a proposal to install solar panels on the
> roof: the idea was that all tenants' and common areas power would receive an
> equal share of the panels' output. What I didn't tell them was that the real
> benefit would be to the people on the top floor, whose electric bills would be
> slashed dramatically just by the shade they'd provide to the roof. Not that it
> mattered; they weren't interested anyway.

I have the perfect setup for it. My roof faces south. The roof pitch is 4:12 - a very good angle to the sun. Here in Tucson we get sunshine most of the year, can't remember the number of days but it's around 300. And lastly the panels will shade the roof which should help keep it a bit cooler.

>
> Frined of mine with a place out in the Mojave Desert (near 29 Palms) has solar
> panels & storage batteries on his property out there. Works well for him, but
> then it's literally 800 sq. ft. and only used on weekends.
>

I guessing he is off the grid? Usually those battery setups are used for that. They are a more of pain since you have to maintain the batteries and replace them. My goal is a setup that requires little maintenance.

n2




SubjectRe: You are correct new Reply to this message
Posted bysphincter
Posted on06/28/09 09:58 AM



> > Frined of mine with a place out in the Mojave Desert (near 29 Palms) has solar
> > panels & storage batteries on his property out there. Works well for him, but
> > then it's literally 800 sq. ft. and only used on weekends.
> >
>
> I guessing he is off the grid? Usually those battery setups are used for that.
> They are a more of pain since you have to maintain the batteries and replace
> them. My goal is a setup that requires little maintenance.

That is *precisely* what it's used for; he's something like 14 miles from the nearest utility pole. He used deep cycle batteries (Optima Yellowtops, IIRC) which makes it less maintenance-intensive, but yeah, it's still something you have to pay attention to that's not needed for most domestic setups.




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