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i finished the final portion of the system per FPL guidelines in August 2018 and everything has been operating nicely with no problems! -
the 3kw system is now operational after the power company installed the net metering meter.
thanks to all for the help.Leave a comment:
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as of last week the system passed inspection. the new net metering meter will be installed after the holiday!Leave a comment:
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Originally posted by Jest Waitn View Post
you can't let go of high voltage dc.
I have seen the result of someone having contact with 115V AC and know that they could have been killed but got lucky. I have also seen what a 480volt AC arc flash do to equipment and people. That type of flash can result in body parts being burnt to a crisp.
AC is not safer than DC. People who come in contact with either can be killed if they are not careful.
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and i already told someone that suggested this that i am not interested in long dc runs. too dangerous. more context added.Leave a comment:
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Originally posted by Jest Waitn View Post
you are the king of not paying attention (context). you & a couple more have hijacked this thread and made it about you. it's not about you. and the veteran members and moderators have stopped posting here after you hijacked it. do you do this to everyone?Leave a comment:
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Originally posted by Jest Waitn View Post
you can't let go of high voltage dc.Leave a comment:
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Originally posted by ButchDeal View Post
Why is 430 or 600 for that matter D.C. Too dangerous but 480 AC isn't? Maybe with a string inverter without ground fault and arc fault protection but any that is approved for US installs now will have those features .Leave a comment:
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Originally posted by ButchDeal View Post
Ok yes you are the king of random statements. You claimed that the advantage is that the can have less loss due to D.C. Runs. I corrected your inaccurate statement that it is not the D.C. But the high voltage that makes it have less lose.
it doesn't matter if you already told someone or are arrfrade of D.C., facts are factsLeave a comment:
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Well said, Butch. FWIW, if you are not comfortable working with voltages over 240, then don't play with large arrarys.Leave a comment:
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Originally posted by Jest Waitn View Post
if i could transmit 480vac to the main panel and then split it or step it down, i'd do it. but not 430vdc. too dangerous.
as far as the line loss, this point was not made by me. it was made in this thread by another. it was suggested that the micros would have trouble when the line voltage rose above 261vac. this was something new to me. and i asked the question about string inverter response to rising voltage (261vac). more context.
Microsw or string inverter trying to push 240v AC a long distance is going to be creeping up on the voltage at the inverter. Micros will not have a choice for higher D.C. Voltage but string inverters will have that option. Further they will not shut down of the D.C. Voltage is effected by the long run, but they will have to shut down if the AC voltage gets too far off.Leave a comment:
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Originally posted by Jest Waitn View Postand i already told someone that suggested this that i am not interested in long dc runs. too dangerous. more context added.
back to what i said, the only real advantage to the string is the ability to have long runs without much power loss. this is not an advantage to me, given the context.
it doesn't matter if you already told someone or are arrfrade of D.C., facts are facts
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Originally posted by J.P.M. View Post
As Butch writes, The long wire loss is mostly f(voltage), not whether the line is carrying AC or DC. Higher Voltage results in lower line loss.
For a given amount of power transmission, higher voltage reduces the line current which is what reduces the resistive losses in the conductor. One better way to make the losses as small as desired is to use appropriate wire thickness and or material as required by specs. Making the choice of micro inverter or optimizers vs, string inverter based on line loss due to voltage drop seems a bit odd.
as far as the line loss, this point was not made by me. it was made in this thread by another. it was suggested that the micros would have trouble when the line voltage rose above 261vac. this was something new to me. and i asked the question about string inverter response to rising voltage (261vac). more context.Leave a comment:
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Originally posted by ButchDeal View Post
It isn't that they are DC power runs but that they are higher voltage.
back to what i said, the only real advantage to the string is the ability to have long runs without much power loss. this is not an advantage to me, given the context.Leave a comment:
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Originally posted by ButchDeal View Post
If by " 'the' or one primary advantage" you mean the one or primary advantage that you are concerned with sure. Most people would consider this pretty low on the comparison chart unless they have very long wire runs.Leave a comment:
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