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Author Topic: How about a solar power source for pop one price mining  (Read 675 times)
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philipma1957
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October 05, 2018, 05:58:27 PM
 #41

I'm not sure about privacy laws in your state, but don't assume that you can bring in an audio (if you have)/video recording if the other party had an expectation of privacy.  If the cameras recorded audio and video you may only be allowed to show the video portion without audio.  If you only have video it will carry a little weight as it makes your side more believable.  Remember in civil court you just have to show your case with a preponderance of the evidence.  Again, not sure about the laws in your state, make sure to check on that.

And this next part won't make sense, but because the company stated that your miner was the cause of the lack of electricity production, you might want to remove it temporarily.  By removing it you can show them and/or your attorney or the courts that it made no difference to the production of power of the solar panels.  You want to remove all doubt in the judges mind, and the judge might be confused between production and consumption.  If the solar company brings it up in court or even next week you can say that it's been disconnected on such and such date and it's made no difference to the production.  I only say this because you stated that the reason for the solar installation was to keep you in Tier 1.  You then installed a miner which uses 1,000 kWh a month which keeps you out of Tier 1, but without the miner you state that you would still be out of tier 1.  It would just be cleaner to stick with your story of wanting to stay in Tier 1, the solar installation was designed for that purpose, you were promised 65 kWh per day to keep you in Tier 1, and the system isn't working as promised.  It's a lot easier than jumping through hoops and defending your connection of a 1,000 kWh a month device that you'll need to explain in court, which nobody will understand.

This is good advice.  

Also  consider telling the solar company  you would stop complaining and not take them to court if they add 5 more panels. With an appropriate invertor.

can  you list the make and model of the inverter  .. I may be able  to find out what it is rated for and see if it is good enough for

12kwatts in panels

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October 05, 2018, 06:02:19 PM
 #42

I'm not sure about privacy laws in your state, but don't assume that you can bring in an audio (if you have)/video recording if the other party had an expectation of privacy.  If the cameras recorded audio and video you may only be allowed to show the video portion without audio.  If you only have video it will carry a little weight as it makes your side more believable.  Remember in civil court you just have to show your case with a preponderance of the evidence.  Again, not sure about the laws in your state, make sure to check on that.

And this next part won't make sense, but because the company stated that your miner was the cause of the lack of electricity production, you might want to remove it temporarily.  By removing it you can show them and/or your attorney or the courts that it made no difference to the production of power of the solar panels.  You want to remove all doubt in the judges mind, and the judge might be confused between production and consumption.  If the solar company brings it up in court or even next week you can say that it's been disconnected on such and such date and it's made no difference to the production.  I only say this because you stated that the reason for the solar installation was to keep you in Tier 1.  You then installed a miner which uses 1,000 kWh a month which keeps you out of Tier 1, but without the miner you state that you would still be out of tier 1.  It would just be cleaner to stick with your story of wanting to stay in Tier 1, the solar installation was designed for that purpose, you were promised 65 kWh per day to keep you in Tier 1, and the system isn't working as promised.  It's a lot easier than jumping through hoops and defending your connection of a 1,000 kWh a month device that you'll need to explain in court, which nobody will understand.

yea the privacy laws state you cannot record someone's audio without their permission - my property does have visual signs announcing that property has cameras - whether their coming on the property upon seeing those signs amounts to consent or not - unknown.

if it comes to it and there is a need to show that the miners do not affect production - not sure how anyone with common sense would think that they do though - then I will shut them down.

This is good advice.  

Also  consider telling the solar company  you would stop complaining and not take them to court if they add 5 more panels. With an appropriate invertor.

can  you list the make and model of the inverter  .. I may be able  to find out what it is rated for and see if it is good enough for

12kwatts in panels

I will get the inverter make model when I go home today and update it here. There are 2 inverters on my system.

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October 05, 2018, 06:12:59 PM
 #43

Sometimes courts aren't about common sense.  It's more about calculating risks and removing doubt.  You don't know the judge's background, you don't know the other side's tactics.  If you can remove one doubt from the equation you will be better off in court.

"The law, for all its failings, has a noble goal - to make the little bit of life that people can actually control more just" - Scott Turow
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October 05, 2018, 06:15:08 PM
 #44

if it comes to it and there is a need to show that the miners do not affect production - not sure how anyone with common sense would think that they do though - then I will shut them down.

If you do then I suggest you replace the load with electric heaters. That way you are comparing the same verifiable power consumption to any changes you see. Of course since kwh is kwh regardless of what the load is you should see the same numbers.

And before someone niggles, miner PSU's use power-factor correction circuits so they are NOT a significant reactive load which is different than a purely resistive load like heaters. Yes slightly reactive but typically corrected to better than 99% of 1:1.

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October 06, 2018, 03:16:43 AM
 #45

can  you list the make and model of the inverter  .. I may be able  to find out what it is rated for and see if it is good enough for

12kwatts in panels

these are  the inverters I have - https://www.sma-america.com/products/solarinverters/sunny-boy-30-us-38-us-50-us-60-us-70-us-77-us.html

the 3.8-US and the 7.7-US

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October 06, 2018, 05:57:01 AM
 #46

http://files.sma.de/dl/27676/SB30-77-1SP-US-40-IA-xx-14.pdf

Technical Data starts on page 65

Stryfe:  assuming a 120/240 volt system, is that correct?  Mine is 120/208 volts but I don’t believe that it’s as common as 120/240 volts.
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October 06, 2018, 06:20:56 AM
 #47

http://files.sma.de/dl/27676/SB30-77-1SP-US-40-IA-xx-14.pdf

Technical Data starts on page 65

Stryfe:  assuming a 120/240 volt system, is that correct?  Mine is 120/208 volts but I don’t believe that it’s as common as 120/240 volts.

yes 120/240

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October 06, 2018, 03:01:45 PM
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 #48

Need Phil or Notfuzzy for this one to verify my numbers or correct me where I’m wrong:

Your 7.7 kW inverter has a maximum usable DC load of 8100 watts at 240 volts.
You have 31 solar modules each 295 watts = 9145 watts, with wiring losses ~8,230 watts going through that one inverter.  It seems to me that you might have 1 solar module too many going through that inverter, or maybe the inverter is able to handle all that power your modules can produce under the most favorable conditions (full sun, cool day) for a short period.  Your CEC rating, and I’m in California so I’m not sure if the rest of the nation uses CEC, is 96.5 so the most power that inverter can produce is 7,816.5 watts AC and with an average of 4.5 hours of sunlight per day over the course of a year, you should produce on average 35.2 kWh per day with just that inverter.

So you added 5 more 295 watt solar modules and a 3.8 kW inverter.  That inverter can handle 4000 watts of DC power at 240 volts. 5 x 295 = 1,475 x .9 = 1327 watts so with the CEC rating factored in you can produce an additional 5.8 kWh per day for a total of 41 kWh on average per day.

The good news is that your 3.8 kW inverter can handle up to 15 solar modules at 295 watts so you have room to add 10 more solar modules to your system.  Doing that will get you a total system of about 53 kWh per day on average, it will definitely get you close to a 60 kWh per day range this time of year if your existing system is giving you 45-46 kWh per day now.
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October 06, 2018, 03:58:12 PM
 #49

Need Phil or Notfuzzy for this one to verify my numbers or correct me where I’m wrong:

Your 7.7 kW inverter has a maximum usable DC load of 8100 watts at 240 volts.
You have 31 solar modules each 295 watts = 9145 watts, with wiring losses ~8,230 watts going through that one inverter.  It seems to me that you might have 1 solar module too many going through that inverter, or maybe the inverter is able to handle all that power your modules can produce under the most favorable conditions (full sun, cool day) for a short period.  Your CEC rating, and I’m in California so I’m not sure if the rest of the nation uses CEC, is 96.5 so the most power that inverter can produce is 7,816.5 watts AC and with an average of 4.5 hours of sunlight per day over the course of a year, you should produce on average 35.2 kWh per day with just that inverter.

So you added 5 more 295 watt solar modules and a 3.8 kW inverter.  That inverter can handle 4000 watts of DC power at 240 volts. 5 x 295 = 1,475 x .9 = 1327 watts so with the CEC rating factored in you can produce an additional 5.8 kWh per day for a total of 41 kWh on average per day.

The good news is that your 3.8 kW inverter can handle up to 15 solar modules at 295 watts so you have room to add 10 more solar modules to your system.  Doing that will get you a total system of about 53 kWh per day on average, it will definitely get you close to a 60 kWh per day range this time of year if your existing system is giving you 45-46 kWh per day now.

so, you think it might help to shift some of the panels from the 7.7 to the 3.8? They did say the first inverter was maxxed and that is why they added the second one - so maybe the panels are producing more than the first inverter can handle? that would mean I am just losing that energy right?

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October 06, 2018, 04:31:05 PM
 #50

You probably don’t need to because you will never have those modules producing maximum power under ideal conditions.

And I need to make a small correction, your 7.7 kW inverter is CEC rated at 97%, the 3.8 kW inverter is 96.5%.
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October 06, 2018, 06:12:54 PM
 #51

yeah  I  read that  7.7 can do a max of  8100 watts  in and it sends a max of  7700 x .975 =

7500  or 7.5 kwatts  which was the most it could do   at say 12 noon to 1 pm on a bright sunny day if and only if you roof allows for the perfect tilt say 30 degrees and faces south .

So they lied a lot  when then set it up with   only the 7.7 kwatt inverter

now they added a 3.8 kwatt and some panels.

but I have no idea of the way the panels are wired i really they should have under 7700/295  =26.1 or 27 panels

and 3800/295 = 12.88 or 13 panels

but panels have specific dc volts so  a string of  7 works but a string of 8 does not

I also don't know how they tied the  2 inverters together .

but to me they certainly tried cheating you when they only put in a 7.7kwatt inverter.

they tried fixing it adding on. Ask for more panels  to the 3.8  see what they say.

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October 06, 2018, 08:23:03 PM
 #52

my roof slants to the east on the back and to the west on the front - the house is lined up with one end facing south and the other end facing north. the only angle they have is to the east or west based on pitch of the roof. as close as they are together, can they angle them to the south? or would they need to space them out more? I would think that to optimize the opportunity - even if for a few hours each day for it to reach its full potential. So far, they are still stone walling me - but maybe move 4 panels from the 7.7 to bring it down to 27 panels - move those 4 over to the 3.8 inverter bringing that one to 10 panels and then ask for three more to bring it to 13?

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October 06, 2018, 08:55:00 PM
 #53

my roof slants to the east on the back and to the west on the front - the house is lined up with one end facing south and the other end facing north. the only angle they have is to the east or west based on pitch of the roof. as close as they are together, can they angle them to the south? or would they need to space them out more? I would think that to optimize the opportunity - even if for a few hours each day for it to reach its full potential. So far, they are still stone walling me - but maybe move 4 panels from the 7.7 to bring it down to 27 panels - move those 4 over to the 3.8 inverter bringing that one to 10 panels and then ask for three more to bring it to 13?

like I said there are specific string patterns when you wire panels and since there are a lot of panels involved across two inverters I can not tell you what is optimum .  Also I am a knowledgeble but not licensed to do the work.

They did cheat you with just the 7.7 kwatt inverter installed

They added the 3.8 kwatt inverter  and 5 panels at 295 = 1455

They should add more panels to the  3.8 kwatt inverter.

Tell you cheated me at first as 7.7 kwatt inverter was too small

and while you gave me a 3.8 kwatt inverter later you only gave me  5 panels with a total of 1455 watts.

I should get at leas 5 more panels or I will have to get a lawyer.

It is worth a shot.  Tell them I don want to have to do face book and youtube attacks over 5 more panels.  bottom line is you did cheat with the 7.7kwatt inverter it was too small.  How many of the 400 installs did you do like that?  I don't want trouble and I don't want to be an a-hole
but I am not the company that put in only a 7.7kwatt inverter  . 

Tell them You took a shot you got caught by me a simple fix is 5 or 6 or 7 more panels.

try 7 panels then drop a little . fact is they did not put in a proper inverter 7.7kwatts was to small.

the 3.8 is a good fix but it needs more then the 5 panels they added.

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October 06, 2018, 09:33:34 PM
 #54

my roof slants to the east on the back and to the west on the front - the house is lined up with one end facing south and the other end facing north. the only angle they have is to the east or west based on pitch of the roof. as close as they are together, can they angle them to the south? or would they need to space them out more? I would think that to optimize the opportunity - even if for a few hours each day for it to reach its full potential. So far, they are still stone walling me - but maybe move 4 panels from the 7.7 to bring it down to 27 panels - move those 4 over to the 3.8 inverter bringing that one to 10 panels and then ask for three more to bring it to 13?

On an east and west facing roof you would not want to angle them to the south because then you will be introducing shading to the panels closely spaced together, especially with the lower sun angles in winter.  Also with tilting introduced it will destroy the aesthetics of a low profile system.  With east and west facing orientation you will also have a certain percent power reduction, I think it would be about 85% but don’t quote me on that, it’s been 18 years since I designed my system.
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October 07, 2018, 02:03:30 AM
 #55

aight - thanks for all the advice everyone - I will work on them in the upcoming week and let you all know if I make any progress.

Happily mining at https://www.kano.is
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October 08, 2018, 04:19:50 PM
 #56

For current sharing, I use smart diode with only 26mV forward voltage drop at 8A
It can handle 15A max. Useful for DIY solar project.
Solve voltage drop and power dissipation, very nice.

PDF
http://www.ti.com/lit/ds/symlink/sm74611.pdf

Where to buy
https://www.newark.com/texas-instruments/sm74611kttr/hot-swap-controller-30v-to-263/dp/54Y4755?cjevent=d386339fcb1411e880dc00090a240610&CMP=AFF-CJ-7642757-Newark%20Product%20Catalog&source=CJ&CAWELAID=120185550002204491
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