How do you know if a panel is not performing to spec?

[Naptown]

[QUOTE=russ;43634]1) *STC : Irradiance 1000W/m2, AM1.5 spectrum, cell temperature 25

[Kids Education Fund]

Without putting yourself in danger see where the junction box where the cable goes to the meter is look for a junction box looking thing.

Morning,

Naptown, climbed on the roof over the weekend. Followed the cable from the meter and the panel is the furthest away from the junction box.

You must have had a suspicion that this was the case. Why does this matter?

thanks

[Naptown]

Depending on the distance there could be some additional voltage drop particularly if all the other modules are putting out full power. (Higher amps on the Line= greater volt drop) This could account for a slight difference. Again the monitoring is not all that accurate on the Enphase this being the furthest one from the meter and therefore the eEnvoy could also be causing some additional inaccuracy in the measurement.
The difference is minimal however and you should not concern yourself too much with it.

[Kids Education Fund]

Depending on the distance there could be some additional voltage drop particularly if all the other modules are putting out full power. (Higher amps on the Line= greater volt drop) This could account for a slight difference. Again the monitoring is not all that accurate on the Enphase this being the furthest one from the meter and therefore the eEnvoy could also be causing some additional inaccuracy in the measurement.
The difference is minimal however and you should not concern yourself too much with it.

Ok, I understand and agree with what you're saying.

One last question, would this drop/inaccurracy not be gradual for the last few panels as opposed to only the last one?

[Naptown]

Ok, I understand and agree with what you're saying.

One last question, would this drop/inaccurracy not be gradual for the last few panels as opposed to only the last one?

If it a communications issue probably not.