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Going Solar.... (1 Viewer)

joffer said:
my utility doesn't allow this.  i can't run off the panels if the grid is down.  don't know if its a TX state law or not.  of course in a Walking Dead scenario i could figure out how to do it ;)
At all?  I don't feel so bad then.  It's a crock of #### IMO, but we can at least partially run.  Do you have the generator too then?

 
The Commish said:
You need to check your state laws.  Some states have been convinced by the power companies that if the power company service is down you can only use a % of what you generate from your panels and have laws to that affect.  That's the case here and I need to find out exactly what that % is.  I suspect I would be able to run everything in my house sans the AC, but I'm not sure about that.
That seems so strange.  I'm in FL as well.  How do they stop you from using them?

 
I'm not sure.  I need to find out.
I think it's the way the inverter is setup.  If it's a GTI (Grid Tied Inverter) most of the time your panel has become part of the closed loop grid, and you aren't really supplying your own power for your house as much as just adding onto the grid. So grid goes down, you are RIP.

A battery backup will keep you on for awhile.  

This is really the only way to do this in a sustainable manner.  The long term issue of climate change and things mean there are huge power drains right at peak times of the day for solar production.  Having solar panels present at end points in the grid can help smooth out bumps where brownouts would otherwise be required. 

Blackouts are typically weather based, and you just hope they don't happen.  Long term, there should be GTI that allow you to disconnect if power is off for a period of time, and while waiting you run off battery.  

 
I think it's the way the inverter is setup.  If it's a GTI (Grid Tied Inverter) most of the time your panel has become part of the closed loop grid, and you aren't really supplying your own power for your house as much as just adding onto the grid. So grid goes down, you are RIP.

A battery backup will keep you on for awhile.  

This is really the only way to do this in a sustainable manner.  The long term issue of climate change and things mean there are huge power drains right at peak times of the day for solar production.  Having solar panels present at end points in the grid can help smooth out bumps where brownouts would otherwise be required. 

Blackouts are typically weather based, and you just hope they don't happen.  Long term, there should be GTI that allow you to disconnect if power is off for a period of time, and while waiting you run off battery.  
I could see this being the case, but then I wouldn't be able to draw anything while they were down.  That's not what I was told.  I was told I'd be able to draw a % while they were down but I couldn't be fully self sufficient while they were down.  I haven't asked what that % was yet.

 
I think it's the way the inverter is setup.  If it's a GTI (Grid Tied Inverter) most of the time your panel has become part of the closed loop grid, and you aren't really supplying your own power for your house as much as just adding onto the grid. So grid goes down, you are RIP.

A battery backup will keep you on for awhile.  

This is really the only way to do this in a sustainable manner.  The long term issue of climate change and things mean there are huge power drains right at peak times of the day for solar production.  Having solar panels present at end points in the grid can help smooth out bumps where brownouts would otherwise be required. 

Blackouts are typically weather based, and you just hope they don't happen.  Long term, there should be GTI that allow you to disconnect if power is off for a period of time, and while waiting you run off battery.  
yes, this is how mine is set up.  the reason i was told was that the utility didn't want anyone electrifying the grid when it was down because people would be working on it.  seems like you could get around that with some relays, but that adds cost.

 
I could see this being the case, but then I wouldn't be able to draw anything while they were down.  That's not what I was told.  I was told I'd be able to draw a % while they were down but I couldn't be fully self sufficient while they were down.  I haven't asked what that % was yet.
There are three main flavors of inverters.  The differences are what are needed to meet the grid hook-ups by region.   Everything is going to be super region specific and across the street could be a totally different thing.

I work for the key component supplier to these power switches.  It's all complicated as #### because there are 1,000,000 grid types out there and to a lesser extent utilities don't want to be obsoleted.  

 
oct 16 to oct 17 was 5743 kwh.  i have zero knowledge on the subject.  is that a lot?
about half of what i draw, and i only have 2400 square feet, although i'm in TX.  Depends on your utility's rules.  if its like Commish and you get full credit for everything you produce, could still be worth it.

 
yes, this is how mine is set up.  the reason i was told was that the utility didn't want anyone electrifying the grid when it was down because people would be working on it.  seems like you could get around that with some relays, but that adds cost.
Yes, but this issue (safety) has been mostly regulated now to the point where this is no longer a problem.

 
about half of what i draw, and i only have 2400 square feet, although i'm in TX.  Depends on your utility's rules.  if its like Commish and you get full credit for everything you produce, could still be worth it.
I don't feel so bad. I've got 4200 sq feet and use about 33k a year

 
There are three main flavors of inverters.  The differences are what are needed to meet the grid hook-ups by region.   Everything is going to be super region specific and across the street could be a totally different thing.

I work for the key component supplier to these power switches.  It's all complicated as #### because there are 1,000,000 grid types out there and to a lesser extent utilities don't want to be obsoleted.  
So the restriction mechanism is in the hardware at my house?

 
Anybody's electric utility offer a solar co-op? Mine does but I'm clueless whether this is worth messing with or not. I kinda like the idea, but feel like I'm missing something here. WHAT?

https://www.mtemc.com/CooperativeSolar

The relevant thing from that page is probably this:

MTEMC residential members can to participate in the program for a monthly program fee of $20 per energy block, which will allow members access to the equivalent amount of generated capacity of approximately five solar panels. In some months, generated capacity may be less than the monthly participation cost, and in some it may exceed that cost; members will see the monthly participation fee as well as their portion of the equivalent generation on their monthly bill.
ETA: max allowed is 2 blocks per household ($40/month)

 
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So I am installed.  And now I have several questions answered that I asked here.  Regarding the limitations of the system and how they keep me from being 100% self sufficient when the power is out.  I have three inverters on the side of the house.  Each of those has electrical outlets connected to them with an on/off switch.  When the power goes out, the system senses that I am not being supplied power and the inverter powers up the electrical outlets.  Each inverter provides 2000Kw of power for as long as the sun is up.  When the sun goes down I am SOL.  It's not exactly the impression I was given initially, but it makes sense.  I have plenty of power there to run everything in my house except for AC of course, but hot water would be a problem since I can't just plug in my hot water heater. That was a bit of a letdown, but overall this system seems to be pretty sweet.  I am now waiting on Duke Power to come out and switch the meter so I can be fully up and running to see what this baby can do.

 
Anybody's electric utility offer a solar co-op? Mine does but I'm clueless whether this is worth messing with or not. I kinda like the idea, but feel like I'm missing something here. WHAT?

https://www.mtemc.com/CooperativeSolar

The relevant thing from that page is probably this:

MTEMC residential members can to participate in the program for a monthly program fee of $20 per energy block, which will allow members access to the equivalent amount of generated capacity of approximately five solar panels. In some months, generated capacity may be less than the monthly participation cost, and in some it may exceed that cost; members will see the monthly participation fee as well as their portion of the equivalent generation on their monthly bill.
ETA: max allowed is 2 blocks per household ($40/month)
There's a little math involved here.  You'd want to compare the Kw price they charge you today against the $40 they are charging you for access.  If they are charging you $5 per Kw today and that $40 for access to five panels is a charge of $4 per Kw, then it makes sense (as long as they don't have any other fees etc).  Make sense?  The toughest part is cutting through all the marketing and getting to the real costs.

 
The Commish said:
So I am installed.  And now I have several questions answered that I asked here.  Regarding the limitations of the system and how they keep me from being 100% self sufficient when the power is out.  I have three inverters on the side of the house.  Each of those has electrical outlets connected to them with an on/off switch.  When the power goes out, the system senses that I am not being supplied power and the inverter powers up the electrical outlets.  Each inverter provides 2000Kw of power for as long as the sun is up.  When the sun goes down I am SOL.  It's not exactly the impression I was given initially, but it makes sense.  I have plenty of power there to run everything in my house except for AC of course, but hot water would be a problem since I can't just plug in my hot water heater. That was a bit of a letdown, but overall this system seems to be pretty sweet.  I am now waiting on Duke Power to come out and switch the meter so I can be fully up and running to see what this baby can do.
Hey man, been a minute. Living in Rock Vegas as much of a slice as I imagine it to be?

So here's my question, given where we live you bring up two key points that would trouble me about this investment. It gets hot down here...Africa hot sometimes. When the power goes out you have plenty of power except to run your AC? That's kinda important for us 60% of the year. Then you follow it with your hot water tank will be inoperable as well. So no AC and no hot water? Those would be two key things I would expect from the system. I know there isn't a good solution for the hot water tank but the AC would be a negative for me. You still need a generator for that. And once the sun goes down your out of power? I thought there were batteries associated with these systems to store power for these down times?

Not knocking it because I've thought about it as well but it's the devil in the details that keep me from giving it serious consideration. I literally just got a 3500 watt inverter generator yesterday. It's plenty for running the fridge and few other essentials. It won't cover me for the Walking Dead scenario but it will get me through the upcoming Snowpocolypse that will hit this weekend and devastate our area for the next week :D

 
Hey man, been a minute. Living in Rock Vegas as much of a slice as I imagine it to be?

So here's my question, given where we live you bring up two key points that would trouble me about this investment. It gets hot down here...Africa hot sometimes. When the power goes out you have plenty of power except to run your AC? That's kinda important for us 60% of the year. Then you follow it with your hot water tank will be inoperable as well. So no AC and no hot water? Those would be two key things I would expect from the system. I know there isn't a good solution for the hot water tank but the AC would be a negative for me. You still need a generator for that. And once the sun goes down your out of power? I thought there were batteries associated with these systems to store power for these down times?

Not knocking it because I've thought about it as well but it's the devil in the details that keep me from giving it serious consideration. I literally just got a 3500 watt inverter generator yesterday. It's plenty for running the fridge and few other essentials. It won't cover me for the Walking Dead scenario but it will get me through the upcoming Snowpocolypse that will hit this weekend and devastate our area for the next week :D
Dude....I moved to Florida a year and a half ago!!!!  :D

I asked all these questions too.  What you'd want at your home and what I'd get if I were still there is a whole home generator that runs off propane/natural gas.  There are battery solutions but they are SIGNIFICANTLY more expensive right now than the generator solution.  The tech in batteries just isn't where it needs to be yet.  Once it's there, I may end up retro fitting batteries in.

The primary reason I made this decision on this house was for stability and longevity of our savings.  We've had months where our bill is $150 then during the summer it's $700.  This system is going to cost us $300 a month until we pay it off, then we don't have a bill anymore.  Energy down here is way more than it was up there where you're at.  If you're still part of York electric, I don't think this sort of move makes sense.  And FWIW, I did look into solar while I was there and the companies I talked to said hooking into the co-ops was a PITA and they didn't give a great return.

 
Dude....I moved to Florida a year and a half ago!!!!  :D

I asked all these questions too.  What you'd want at your home and what I'd get if I were still there is a whole home generator that runs off propane/natural gas.  There are battery solutions but they are SIGNIFICANTLY more expensive right now than the generator solution.  The tech in batteries just isn't where it needs to be yet.  Once it's there, I may end up retro fitting batteries in.

The primary reason I made this decision on this house was for stability and longevity of our savings.  We've had months where our bill is $150 then during the summer it's $700.  This system is going to cost us $300 a month until we pay it off, then we don't have a bill anymore.  Energy down here is way more than it was up there where you're at.  If you're still part of York electric, I don't think this sort of move makes sense.  And FWIW, I did look into solar while I was there and the companies I talked to said hooking into the co-ops was a PITA and they didn't give a great return.
LOL, #### I gotta update my notebook more often! No issues with the hurricanes I hope?

I hear you on batteries, some of the systems my company is looking at are stupid expensive for not a lot of return. Cool tech but not for the everyday guy. Our utilities have gone up pretty significantly since the company decided to pass along the cost of the $8 billion dollar failed nuclear reactor build to the consumers :thumbup: Thinking moving into a cave is looking better & better.

 
LOL, #### I gotta update my notebook more often! No issues with the hurricanes I hope?

I hear you on batteries, some of the systems my company is looking at are stupid expensive for not a lot of return. Cool tech but not for the everyday guy. Our utilities have gone up pretty significantly since the company decided to pass along the cost of the $8 billion dollar failed nuclear reactor build to the consumers :thumbup: Thinking moving into a cave is looking better & better.
Other than Irma just after moving in, we've been good :thumbup:   We ended up in a bit of a fixer so it's kept us busy.

These guys are an awesome resource if you are interested in learning more.  They can tell you everything you want to know.  I will say that if you go online and read about them, you may get some conflicting information because their start was pretty rocky with some guys who were pretty shady, but by the time I got hold of them and talked to them they had righted the ship and they were awesome to work with.  When I moved into my Rock Vegas house, the attic fans all died at once and they hooked me up with solar fans that were unbelievable.  They even cost less after the tax credits and I didn't have to pay the electricity for vent fans anymore.  

 
After 40 Years of Searching, Scientists Identify The Key Flaw in Solar Panel Efficiency

DAVID NIELD

8 JUN 2019

Solar panels are fantastic pieces of technology, but we need to work out how to make them even more efficient – and scientists just solved a 40-year-old mystery around one of the key obstacles to increased efficiency.

A new study outlines a material defect in silicon used to produce solar cells that has previously gone undetected. It could be responsible for the 2 percent efficiency drop that solar cells can see in the first hours of use: Light Induced Degradation (LID).

Multiplied by the increasing number of panels installed at solar farms around the world, that drop equals a significant cost in gigawatts that non-renewable energy sources have to make up for.

In fact, the estimated loss in efficiency worldwide from LID is estimated to equate to more energy than can be generated by the UK's 15 nuclear power plants. The new discovery could help scientists make up some of that shortfall.

"Because of the environmental and financial impact solar panel 'efficiency degradation' has been the topic of much scientific and engineering interest in the last four decades," says one of the researchers, Tony Peaker from the University of Manchester in the UK.

"However, despite some of the best minds in the business working on it, the problem has steadfastly resisted resolution until now."

To find what 270 research papers across four decades had previously been unable to determine, the latest study used an electrical and optical technique called deep-level transient spectroscopy (DLTS) to find weaknesses in the silicon.

Here's what the DLTS analysis found: As the electronic charge in the solar cells gets transformed into sunlight, the flow of electrons gets trapped; in turn, that reduces the level of electrical power that can be produced.

This defect lies dormant until the solar panel gets heated, the team found.

"We've proved the defect exists, its now an engineering fix that is needed," says one of the researchers, Iain Crowe from the University of Manchester.

The researchers also found that higher quality silicon had charge carriers (electrons which carry the photon energy) with a longer 'lifetime', which backs up the idea that these traps are linked to the efficiency degradation.

What's more, heating the material in the dark, a process often used to remove traps from silicon, seems to reverse the degradation.

The work to push solar panel efficiency rates higher continues, with breakthroughs continuing to happen in the lab, and nature offering up plenty of efficiency tips as well. Now that the Light Induced Degradation mystery has been solved, solar farms across the globe should benefit.

"An absolute drop of 2 percent in efficiency may not seem like a big deal, but when you consider that these solar panels are now responsible for delivering a large and exponentially growing fraction of the world's total energy needs, it's a significant loss of electricity generating capacity," says Peaker.

The research has been published in the Journal of Applied Physics.

 
I am installed, inspected, but not live yet...waiting on the utility been almost two weeks 😞. Gonna have to call those fools Monday 

 
Has any one installed their own?  What was the savings if so?  If my wife ever divorces me,  gonna buy some property out in the country install it my self.   Which I would like to buy a property with a stream and build a water turbine generator, coupled with solar and a battery back-up.  

 
yes, this is how mine is set up.  the reason i was told was that the utility didn't want anyone electrifying the grid when it was down because people would be working on it.  seems like you could get around that with some relays, but that adds cost.
That's exactly what I was told. I've had a PV array since 2008. No complaints

 
I just think the panels look so terrible. The Tesla roof has me very curious. I’ll research once it’s available on the east coast.  

In my mind I can discount it about $15k, because we’ve been in the market for a whole house backup generator and it would cost about that much to install and run all the plumbing. This would serve that dual purpose as well.

 
The value equation here is having some storage bank rather than flipping it back to the electric company.  This extends your payoff 7 more years, but puts you nearly off grid if you have enough capacity.  Exceptions here are if flipping back to the electric company pays well.  
I agree.  There are a decent number of power wall / batteries on/entering the market.  The warranties are 10 years iirc. 

 
spend a lot of time looking at your roof?
I mean, whenever I walk or drive up to my house, yeah, I see the roof.  It’s also curb appeal.  If it’s ugly, it may be hard to sell it one day.

Same reason i think it looks ugly or tacky when people have a bunch of satellite dishes and wires dangling down the roof from them.  Just an eyesore.  

 
I could see this being the case, but then I wouldn't be able to draw anything while they were down.  That's not what I was told.  I was told I'd be able to draw a % while they were down but I couldn't be fully self sufficient while they were down.  I haven't asked what that % was yet.
There are three main flavors of inverters.  The differences are what are needed to meet the grid hook-ups by region.   Everything is going to be super region specific and across the street could be a totally different thing.

I work for the key component supplier to these power switches.  It's all complicated as #### because there are 1,000,000 grid types out there and to a lesser extent utilities don't want to be obsoleted.  
I forgot to come back to this. So I'm up and running now for a few months. Each inverter has an outlet with a switch attached to it. So when the powers put the inverter directs the electricity to those outlets and i can use them like id use a generator..... will during the day anyway. Mystery solved

 
I mean, whenever I walk or drive up to my house, yeah, I see the roof.  It’s also curb appeal.  If it’s ugly, it may be hard to sell it one day.

Same reason i think it looks ugly or tacky when people have a bunch of satellite dishes and wires dangling down the roof from them.  Just an eyesore.  
Possible solution.

 
We have had panels since 2014: 26 @ 260 w for 6.76 kw  system. Basically, $19k system with 50% rebate from local utility and 30% tax credit so out of pocket was about $6,500. On an annual basis consistently provides 60% of our electricity demand. Usually get about 4 bills per year that are negative (the credit rolls to next month). When panels are producing during the day, all energy is directly going to current home demand. Any excess power being produced goes back onto the grid to the utility.  My only complaint is the ridiculous effort by the utility to pay consultant co in california 10’s of thousands of $ to calculate the  “cost of solar” the city pays you for the solar power you produce.  After all this it night change from $.105 to $.097 per kwh and there is a rolling 5 year average so the  change each year is rather negligible. Technically your panels are a power system and you can sell the energy to any utility. Going back to the “rebate” and you are agreeing to sell your power to the local utility for 20 years in exchange for the rebate. There are numerous types of cost models around the country that cities/utilities have developed.  When selling your home you will not get any appraisal value for a solar system, at least in central Texas. It may, however, make your home more desirable, as we just found out when we recently sold our home. We have had no maintenance or repairs to the system- it just works every day. The inverters tend to need to be replaced around 10 years (maybe around $2k). The panels are on the back of the house so not visible from the street. I think in the future more homes will be designed with roof lines that take advantage of solar, or like Tesla, the shingles are the panels.

 
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Into the guts of Florida summer and my bill is about $100 at peak.  Prior to the panels, that would be a $700-$800 bill.  I suspect I get down to under $50 once the 2002 unit goes caput and I replace it.

 
I forgot to come back to this. So I'm up and running now for a few months. Each inverter has an outlet with a switch attached to it. So when the powers put the inverter directs the electricity to those outlets and i can use them like id use a generator..... will during the day anyway. Mystery solved
damn i wish i could do that in TX

 
$700-$800 a month? Whoa.
Yeah....we have a two story house in central Florida...little over 4000 sq and two units that are over 10 years old each.  They run all the time when it's 95+.  On top of that, we need a good layer of insulation in our second floor attic.  I will say, after putting the panels on the roof, it has helped the AC upstairs...deflects a lot of that heat.

 
That's a pretty big house. Live in AZ and my high bill usually around $400 for 2750 two story house with two new units put in in 2013.

 
Yeah....we have a two story house in central Florida...little over 4000 sq and two units that are over 10 years old each.  They run all the time when it's 95+.  On top of that, we need a good layer of insulation in our second floor attic.  I will say, after putting the panels on the roof, it has helped the AC upstairs...deflects a lot of that heat.
How many panels?

 
cap'n grunge said:
That's a pretty big house. Live in AZ and my high bill usually around $400 for 2750 two story house with two new units put in in 2013.
It was a fixer upper...still working on it.  It was either this house, a 2 bed 3 bath or a McMansion on a postage stamp lot that cost double what we paid for this one.  I think my problem is magnified by the fact it's two story...all the hot air rises to upstairs.

 
It was a fixer upper...still working on it.  It was either this house, a 2 bed 3 bath or a McMansion on a postage stamp lot that cost double what we paid for this one.  I think my problem is magnified by the fact it's two story...all the hot air rises to upstairs.
So shut up and go downstairs! :lmao:

I kill me!

 

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